atelNum int64 1 15.2k | title stringlengths 8 376 | authors stringlengths 3 6.6k | body stringlengths 11 5.12k | submissionDate stringlengths 19 19 | keywords stringlengths 4 185 | submissionDay stringlengths 10 10 | submissionTime stringlengths 8 8 | length_of_text int64 11 5.12k | embedding list | idx int64 0 15.2k |
|---|---|---|---|---|---|---|---|---|---|---|
1 | QPOs in 4U 1626-67 | J. Kommers (MIT), D. Chakrabarty (MIT), W. H. G. Lewin (MIT) | The low-mass X-ray binary pulsar 4U 1626-67 shows quasi-periodic oscillations (QPOs) with a centroid frequency of 0.048 Hz and red noise variability as well as coherent pulsations at the 0.130 Hz neutron star rotation frequency. In power density spectra of observations made with the Rossi X-ray Timing Explorer, we have... | 1997-12-18 01:28:00 | optical,x-ray,binary,neutron star,pulsar,star | 1997-12-18 | 01:28:00 | 3,014 | [
-0.059046339243650436,
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0.00505917938426137,
-0.07444272935390472,
-0.0007450644625350833,
-0.04630762338638306,
0.026958417147397995,
-0.04481837898492813,
0.028803428635001183,
-0.10... | 0 |
2 | GB971227 | R. Rutledge | The following message was emailed to me this evening by Walter Lewin at MIT. - -------------------------------------------------------------- A GRB (GB971227, Bacodine trigger 6546) has been detected by BeppoSAX GRBM and WFC at 8:23:06 UT.
Coordinates from WFC are: RA(2000)=194.373 Dec(2000)=59.27 The event was detect... | 1997-12-28 12:43:00 | gamma ray,gamma-ray burst | 1997-12-28 | 12:43:00 | 901 | [
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0.04071778059005737,
-0.03665624186396599,
0.040671251714229584,
-0.... | 1 |
3 | Improved Coordinates for GB971227 | R. Rutledge | In addendum of ATEL #2: Additional Information forwarded by Walter Lewin, providing improved coordinates for the Gamma Ray Burst 971227 - ---------------------------------------------------------------
Slightly improved coordinates of GB971227 from BeppoSAX WFC are RA(2000)=194.395 Decl(2000)=59.256 i.e. only 1.4' far... | 1997-12-28 14:52:00 | gamma ray,gamma-ray burst | 1997-12-28 | 14:52:00 | 1,007 | [
-0.01714549958705902,
-0.032474663108587265,
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0.032570596784353256,
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-... | 2 |
4 | The Probable Connection Between Relativistic Shock Acceleration and Gamma Ray Bursts | R. Lieu (Department of Physics, University of Alabama, Huntsville, AL 35899) | The recent detection of delayed Gamma ray burst (GRB) afterglows at longer wavelengths (van Paradijs et al 1997, Piro et al 1997, Bond 1997, Frail and Kulkarni 1997, Halpern et al 1997) supports strongly the notion that GRBs are produced at relativistic cosmological shocks (Pacynski 1986, Goodman 1986, Rees and Meszaro... | 1998-01-06 14:11:00 | optical,gamma ray,uhe,agn,cosmic rays,gamma-ray burst,a comment | 1998-01-06 | 14:11:00 | 3,105 | [
-0.09626948088407516,
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0.032534126192331314,
-0.03574583679437637,
0.025741171091794968,
-0.03... | 3 |
5 | GRB 971214 | S. R. Kulkarni, A. N. Ramaprakash, J. Bloom, S. Djorgovski, Caltech; R. Goodrich, Keck Observatory/CARA and D. Frail, VLA/NRAO report on behalf of the Caltech GRB effort | The optical transient (IAUC # 6788 ) of GRB 971214 (IAUC # 6787 ; IAUC # 6792 ) was observed by J. Aycock using the LRIS instrument on Keck II. The observations were conducted between 1400--1600 UT of January 10, 1998 and images were obtained in the R band. The seeing was consistently 0.86 arcsec and 12 frames each of ... | 1998-01-13 05:31:00 | optical,gamma ray,gamma-ray burst,transient | 1998-01-13 | 05:31:00 | 1,510 | [
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-0.03440670296549797,
-0.022481439635157585,
-0... | 4 |
6 | GRB980109 | Andrzej Udalski and Martin Kubiak, Warsaw University Observatory, on behalf of the OGLE collaboration | GRB980109 field was observed by the OGLE collaboration with the 1.3-m Warsaw telescope at the Las Campanas Observatory, Chile on Jan. 10.06, 10.18, 11.05, 12.05 and 16.05, 1998. Ten 900 sec I-band exposures were collected. The field size was 14.2 by 14.2 arcmins covering almost entire error box. None fading or variable... | 1998-01-18 09:48:00 | optical,gamma ray,gamma-ray burst,variables | 1998-01-18 | 09:48:00 | 427 | [
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-0.07057124376296997,
-0.07594247162342072,
-0.008153000846505165,
0.007922053337097168,
-0.0... | 5 |
7 | GRB 971214 | S. R. Kulkarni, K. L. Adelberger, J. S. Bloom, T. Kundic, L. Lubin, (California Institute of Technology) | On December 28, 1997, Kundic and Lubin obtained spectra of the optical transient of GRB 971214 (IAUC # 6788 ) with the Low Resolution Imaging Spectrograph (LRIS) mounted on the Keck II telescope. The seeing conditions were excellent. If the transient continued the power-law decay as indicated by the data from Halpern e... | 1998-01-24 12:07:00 | optical,gamma ray,gamma-ray burst,transient | 1998-01-24 | 12:07:00 | 1,686 | [
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0.004991576541215181,
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-0.095... | 6 |
8 | Possible Radio Counterpart of MXB 1730-335 | R. Rutledge (UCB), C. Moore (Kapteyn Inst.) D. Fox, W. Lewin (MIT), and J. van Paradijs (UA/UAH) | Contemporaneous observations with RXTE All-Sky Monitor (2-10 keV) and the VLA at 4.9 and 8.4 GHz reveal a transient radio point-source, the intensity of which is correlated with the X-ray flux of MXB 1730-335 (The Rapid Burster; RB). The dates of observations, ASM 1-day average countrates, and flux densities are:
The ... | 1998-01-28 03:03:00 | radio,x-ray,binary,transient | 1998-01-28 | 03:03:00 | 1,649 | [
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-0.0... | 7 |
9 | Outburst of MXB 1730-335 | D. Fox, R. Guerriero, W. Lewin (MIT), R. Rutledge (UCB), C. Moore (Kapteyn Inst.), M. van der Klis (UA), and J. van Paradijs (UA/UAH) | The Rapid Burster (MXB 1730-335) has been detected by the All-Sky Monitor of the Rossi X-ray Timing Explorer in three consecutive 90-second dwells over the course of the last 28 hours (beginning 28 Jan 1998 22:20 UT). The source was detected at fitted count rates of 14, 11, and 15 cts/sec (per SSC), with uncertainties ... | 1998-01-30 11:39:00 | radio,infra-red,x-ray,binary,transient | 1998-01-30 | 11:39:00 | 1,195 | [
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0.05900949239730835,
-0.04846905544400215,
0.02560480870306492,
0.03337... | 8 |
10 | GRB as Vacuum Discharge of Schwinger Critical Field at Fireball Surface | R. Lieu, Y. Takahashi (U Ala, Huntsville), T. W.B. Kibble (Imperial College) | It has long been recognized[1] that when a static electric field exceeds a critical value E_c corresponding to an electron acceleration of a_c ~2.4 x 10^31 cm per sec per sec, it is unstable with respect to pair production. The `vacuum breakdown' causes a E=E_c field to dissipate its energy in a timescale of ~10^-16 se... | 1998-03-07 08:50:00 | optical,gamma ray,gamma-ray burst,supernovae | 1998-03-07 | 08:50:00 | 3,505 | [
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-0.02465294487774372,
-0.036653775721788406,
-0.059272632002830505,
-0.0... | 9 |
11 | Discovery of quasi-periodic oscillations in the new X-ray pulsar XTE J1858+034 | B. Paul (Tata Institute of Fundamental Research) | Discovery of quasi-periodic oscillations in the X-ray pulsar XTE J1858+034
This is the fifth X-ray pulsar after Cen X-3, EXO 2030+375, 4U 1626-67 and GRO J1744-28 in which QPOs have been detected. Assuming that the QPOs are produced as a result of some inhomogeneity at the magnetospheric boundary with the disk rotatin... | 1998-03-20 00:59:00 | x-ray,binary,neutron star,pulsar,star,transient | 1998-03-20 | 00:59:00 | 1,210 | [
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0.09674640744924545,
-... | 10 |
12 | BeppoSAX Alert -- GB980425 | Editor | I received the following notice:
BeppoSAX GRB MAIL N. 98/9 ^^^^^^^^^^^^^^^^^^^^^^^^^
GB980425
The BeppoSAX GRBM was triggered at 21:49:11 UT of April 25 by a GRB (GB980425) The event was detected by one of the WFC (WFC2), with preliminary position: RA(2000)=293.65 Dec(2000)=-52.81 The error radius at this stage is 1... | 1998-04-26 11:37:00 | gamma ray,gamma-ray burst | 1998-04-26 | 11:37:00 | 541 | [
-0.006444768514484167,
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-... | 11 |
13 | BeppoSAX GRB ALERT: refined position of GB980425 | Editor | Further to ATEL #12, I received the following:
BeppoSAX GRB MAIL N. 98/10 ^^^^^^^^^^^^^^^^^^^^^^^^^^
GB980425: REFINED POSITION FROM WFC
Refined position of GB980425 in BeppoSAX WFC are: RA(2000)=293.72 Dec(2000)=-52.83
with an error radius of 8', that includes systematic errors due to a not optimal attitude config... | 1998-04-26 12:32:00 | gamma ray,gamma-ray burst | 1998-04-26 | 12:32:00 | 501 | [
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-0.... | 12 |
14 | BeppoSAX Alert: GB980425: Preliminary results from BeppoSAX NFI follow up | Editor | Further to ATEL #12, #13, I received the following:
BeppoSAX GRB MAIL N. 98/11 ^^^^^^^^^^^^^^^^^^^^^^^^^^
GB980425: Preliminary results from BeppoSAX NFI follow up
The BeppoSAX Wide Field Camera error box of GRB 980425 (IAUC # 6884 ) was observed with the BeppoSAX Narrow Field Instruments (NFI) starting about 10.0 h... | 1998-04-29 00:50:00 | x-ray,gamma ray,gamma-ray burst | 1998-04-29 | 00:50:00 | 881 | [
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-0.04547837749123573,
0.04517275094985962,
-0.022178... | 13 |
15 | GB980425: BeppoSAX NFI follow up UPDATE | Editor | Further to previous Telegrams (ATEL #12, #13, #14), I received the following:
BeppoSAX GRB MAIL N. 98/12 ^^^^^^^^^^^^^^^^^^^^^^^^^^
GB980425: BeppoSAX NFI follow up UPDATE
The first TOO pointing of GB980425 with the NFI was completed with a total duration of about 2 days. The unknown x-ray source quoted in the previ... | 1998-04-30 02:42:00 | x-ray,gamma ray,gamma-ray burst | 1998-04-30 | 02:42:00 | 830 | [
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0.0069633666425943375,
-0.02356240525841713,
0.046153802424669266,
0.00... | 14 |
16 | Real Time Gravitational Microlensing in OGLE experiment | Andrzej Udalski, Michal Szymanski (Warsaw Univ. Observatory) | A. Udalski and M. Szymanski, on behalf of the OGLE collaboration: The Early Warning System (EWS) designed for detection of microlensing events in progress has been implemented for the second phase of the Optical Gravitational Lensing Experiment - OGLE-2. Information about detected events in progress is available on WWW... | 1998-05-07 21:06:00 | optical,gravitational lensing,microlensing event,star | 1998-05-07 | 21:06:00 | 934 | [
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0.017240010201931,
-0.022334573790431023,
-0.031071830540895462,
-0.0040208157151937485,
0.027... | 15 |
17 | Discovery of 7-13 Hz quasi-periodic oscillations in the new X-ray transient XTE J1806-246 | Rudy Wijnands & Michiel van der Klis (Astronomical Institute "Anton Pannekoek", University of Amsterdam) | We have discovered quasi-periodic oscillations (QPO) with frequencies of 7-13 Hz (see the power density spectrum) in the recently discovered X-ray transient XTE J1806-246 (IAUC 6891 ) in data obtained on May 3 1998 21:03-22:31 UT with the proportional counter array (PCA) onboard the Rossi X-ray Timing Explorer. The tot... | 1998-05-08 09:06:00 | x-ray,binary,star,transient | 1998-05-08 | 09:06:00 | 1,603 | [
-0.02181578427553177,
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-0.02595989964902401,
0.014243686571717262,
-0.03821008652448654,
0.012391510419547558,
0.... | 16 |
18 | Possible high magnification microlensing event | Andrzej Udalski, Michal Szymanski (Warsaw Univ. Observatory) | The OGLE team informs about a microlensing event in progress - OGLE-1998-BUL-15 (18:07:20.83, -27:34:10.8, J2000) which is presently about 4 days before maximum and is rising rapidly (already more than 2 mag above the normal level). Preliminary fit to the light curve predicts possible maximum magnification as large as ... | 1998-05-08 16:35:00 | optical,microlensing event | 1998-05-08 | 16:35:00 | 590 | [
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0.0... | 17 |
19 | 3rd Interplanetary Network Gamma-Ray Burst Website | Kevin Hurley (SSL) | We announce the opening of the 3rd Interplanetary Network web site at http://ssl.berkeley.edu/ipn3/index.html . This site presently has four parts:
1. A bibliography of over 3000 publications on gamma-ray bursts,
2. IPN data on all bursts triangulated up to February 1998,
3. A master list showing which spacecraft ob... | 1998-05-12 05:49:00 | gamma ray,gamma-ray burst,a comment | 1998-05-12 | 05:49:00 | 396 | [
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0.06079752370715141,
-0.006706737447530031,
-0.026... | 18 |
20 | GB980515 | Editor | Two messages received, regarding a newly detected gamma-ray burst:
BeppoSAX GRB MAIL N. 98/13 ^^^^^^^^^^^^^^^^^^^^^^^^^
GB980515
A GRB (GB980515) was observed by the BeppoSAX GRBM at about 17:00:10 UT of May 15. The event was detected by one of the WFC (WFC2), with preliminary position:
RA(2000)=319.25 Dec(2000)=-6... | 1998-05-19 06:39:00 | gamma ray,gamma-ray burst | 1998-05-19 | 06:39:00 | 1,062 | [
-0.03324035555124283,
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0.03496617451310158,
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0.03044644556939602,
-0.... | 19 |
21 | GB980519 | Editor | The following two messages were received by email:
BeppoSAX GRB MAIL N. 98/15 ^^^^^^^^^^^^^^^^^^^^^^^^^^
GB980519
GB980519 (BATSE trigger n.6764) has been detected by the GRBM of BeppoSAX and by the WFC at about 12:20:00 UT of May 19.
A preliminary position by the WFC is
RA(2000)=350.54 Dec(2000)=77.293
with an e... | 1998-05-20 02:11:00 | gamma ray,gamma-ray burst | 1998-05-20 | 02:11:00 | 678 | [
-0.03488893061876297,
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0.04878101125359535,
-0.04... | 20 |
22 | BeppoSAX Alert: GB980515 | Editor | Further to ATEL #20, The following email was received:
BeppoSAX GRB MAIL N. 98/17 ^^^^^^^^^^^^^^^^^^^^^^^^^^
GB980515: follow up with NFI
A previously unknown faint X-ray source has been found by MECS during the follow up observation starting about 10 hrs after the GRB.
Position is:
R.A.(2000)= 21h16m49s.5 Dec.(20... | 1998-05-20 13:20:00 | x-ray,gamma ray,gamma-ray burst | 1998-05-20 | 13:20:00 | 406 | [
-0.04843590036034584,
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-0.... | 21 |
23 | SGR1900+14 | K. Hurley, Space Sciences Laboratory, on behalf of the Ulysses Gamma-Ray Burst Team; C. Kouveliotou, Universities Space Research Association, on behalf of the Gamma-Ray Observatory BATSE team; and E. Mazets and T. Cline, on behalf of the KONUS-WIND team | This soft gamma repeater has entered an extraordinary new phase of activity with a previously unobserved frequency and intensity of bursts. Activity began on May 26 and has continued at least through May 30. Triangulation with Ulysses and BATSE gives a preliminary annulus whose center is at (equinox 2000.0) R.A. = 21h5... | 1998-06-03 09:17:00 | x-ray,gamma ray,soft gamma-ray repeater,star | 1998-06-03 | 09:17:00 | 1,035 | [
-0.11983335763216019,
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0.010298144072294235,
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0.019769368693232536,
0.009769903495907784,
0.04895048588514328,
-0... | 22 |
24 | SGR1900+14 | C. Kouveliotou, Universities Space Research Association, P. Woods, M. Kippen, M. S. Briggs, University of Alabama in Huntsville, K. Hurley, Space Sciences Laboratory | On May 30th, BATSE triggered on an extremely intense outburst from this source that comprised at least 38 bursts of varying intensity and duration; the series of bursts started at 32624 s UT, and lasted for about 350s. The peak flux of each of the three major bursts in the series is 1.1x10e-4 ergs/cm^2 s (between 25-30... | 1998-06-03 09:21:00 | radio,infra-red,x-ray,gamma ray,soft gamma-ray repeater | 1998-06-03 | 09:21:00 | 986 | [
-0.026809008792042732,
-0.02395550161600113,
-0.011130934581160545,
0.03583071753382683,
0.010469449684023857,
-0.045562248677015305,
-0.03666648641228676,
0.1021675392985344,
-0.01022622361779213,
-0.00936045777052641,
-0.015590960159897804,
-0.024219825863838196,
-0.007880715653300285,
-... | 23 |
25 | New RXTE/ASM Transient XTE J1748-288 | D. A. Smith, A. Levine, and A. Wood (M. I.T.) report for the RXTE ASM team at M. I.T. and NASA Goddard Space Flight Center | The RXTE All-Sky Monitor has detected a transient X-ray source at the following position (equinox J2000): R.A=17h48m8s, Decl.= -28o28.8' (error radius = 5' to better than 90% confidence). The source was observed in each of two detector systems in two contiguous 90 s exposures at 1998 June 4.69, and again in two more ob... | 1998-06-05 05:26:00 | x-ray,transient | 1998-06-05 | 05:26:00 | 460 | [
-0.02214628830552101,
-0.0291371401399374,
0.03874041140079498,
0.08676224201917648,
0.10416694730520248,
-0.054732222110033035,
0.03711175546050072,
0.11241938918828964,
-0.02771141193807125,
-0.036976080387830734,
-0.01685398630797863,
-0.013595890253782272,
0.11346253752708435,
0.026606... | 24 |
26 | IR Observations of SGR 1900+14 | B. R. Oppenheimer, J. S. Bloom, S. S. Eikenberry, and K. Matthews (Caltech) | We have obtained narrowband 2.2 micron images of the proposed infrared counterpart to SGR 1900+14 (Vrba et al. 1996, Ap.J. 468, 225) at June 3.486 UT, 4.1 days after the recent bursting activity reported by Hurley et al. and Kouveliotou et al. (ATEL #23, #24; IAUC # 6929 ). Differential photometry of stars "A" and "B" ... | 1998-06-05 08:43:00 | infra-red,gamma ray,soft gamma-ray repeater,star | 1998-06-05 | 08:43:00 | 587 | [
-0.14549779891967773,
-0.034655459225177765,
-0.010666281916201115,
0.07408343255519867,
-0.011319203302264214,
-0.05056345835328102,
-0.034236833453178406,
0.05054570734500885,
0.0032378952018916607,
-0.013284074142575264,
0.01960062049329281,
0.008745398372411728,
0.03781339153647423,
-0... | 25 |
27 | Possibly high amplification microlensing event | Michal Szymanski, Andrzej Udalski (Warsaw Univ. Observatory) | The OGLE team informs about a microlensing event in progress - OGLE-1998-BUL-18 (17:54:21.79, -29:53:24.0, J2000) which is presently about 2 days before maximum. It is relatively bright star (I0=15.5), rising rapidly. Preliminary microlensing fit to the light curve predicts large maximum magnification to be reached on ... | 1998-06-05 20:24:00 | optical,microlensing event,star | 1998-06-05 | 20:24:00 | 588 | [
-0.04228191822767258,
0.024694232270121574,
0.01872921921312809,
0.05373351648449898,
0.03962601348757744,
-0.1556933969259262,
0.021165110170841217,
0.06659672409296036,
-0.02982291579246521,
-0.006780683994293213,
-0.02871541492640972,
0.020499659702181816,
-0.0070716943591833115,
0.0091... | 26 |
28 | Microlensing Event Caustic Crossing | MACHO/GMAN Collaboration | The MACHO/GMAN Collaboration (cf. IAUC 6845 ) plus affiliate S.Rhie report that further observations of microlensing event MACHO-98-SMC-1 (R.A. = 0h45m35s.2, Decl. = -72o52'34" J2000) confirm the binary lens interpretation and yield a prediction for the time of the 2nd caustic crossing: June 19.2 +/- 1.5 UT. The confir... | 1998-06-16 18:13:00 | optical,binary,microlensing event,star | 1998-06-16 | 18:13:00 | 1,006 | [
-0.07306069135665894,
-0.04358486458659172,
0.005092214792966843,
0.052392132580280304,
0.04467017948627472,
-0.071992427110672,
-0.025720233097672462,
0.07895222306251526,
-0.022928183898329735,
0.007092949002981186,
0.0197062399238348,
-0.138790100812912,
-0.04603937640786171,
-0.0251492... | 27 |
29 | BATSE Discovery of Previously Unknown Soft Gamma-ray Repeater SGR1627-41 | C. Kouveliotou, Universities Space Research Association, M. Kippen, P. Woods, G. Richardson, University of Alabama in Huntsville, V. Connaughton, National Research Council, report on behalf of the BATSE team at NASA/Marshall Space Flight Center | BATSE has detected repeated soft gamma-ray bursts consistent with the same (previously unknown) location. We recorded three bursts on June 15.109, 15.296, 15.411 UT (BATSE triggers 6825, 6826, 6827, respectively) with an average duration of ~ 200 milliseconds. Preliminary spectral analysis of the data indicates that th... | 1998-06-19 00:34:00 | gamma ray,gamma-ray burst,soft gamma-ray repeater | 1998-06-19 | 00:34:00 | 1,256 | [
-0.013719126582145691,
-0.0749891921877861,
0.006522606126964092,
0.042304351925849915,
0.016668271273374557,
-0.038173314183950424,
0.033438194543123245,
0.019191300496459007,
0.040332697331905365,
0.013250663876533508,
-0.000018367516531725414,
-0.06741486489772797,
0.020725494250655174,
... | 28 |
30 | RXTE/ASM observations of new SGR 1627-41 | D. A. Smith & A. M. Levine (MIT) | Although the ASM did not observe any of the BATSE-detected events from SGR 1627-41, during the interval from Jun 15 to Jun 19, three short (<~1 s) burst events were detected in SSC 3 at May 17.943917, 17.954243, and 18.010803 (UTC). During the first event, the original BATSE location (ATEL #29) was outside the FOV of t... | 1998-06-20 03:16:00 | x-ray,gamma ray,soft gamma-ray repeater,supernova remnant,supernovae | 1998-06-20 | 03:16:00 | 1,442 | [
-0.06422849744558334,
-0.052344098687171936,
-0.03756909817457199,
0.023606907576322556,
0.04070578143000603,
0.026342041790485382,
-0.04498215764760971,
0.06688375771045685,
0.02388397417962551,
0.04296359792351723,
0.03140248730778694,
-0.001447230693884194,
-0.053413208574056625,
0.0144... | 29 |
31 | GRB 980425/980712 repeater nature: GRBs as precessing Gamma Jets | Daniele Fargion | We notice that the two very recent GRBs on July 12 (by GCN Trigger n.6917 at UT 06:04:00:73 and , fifteen hours later , n.6918 at UT 21:06:07:13), are placed at coordinates (RA 292.6,Dec -47.6; RA 300.5,Dec -52) whose corresponding error boxes (3.4-18.2 deg) almost contains and /or overlaps the previous GRB980425 cente... | 1998-07-15 21:49:00 | optical,gamma ray,gamma-ray burst,magnetar,soft gamma-ray repeater,supernova remnant,supernovae | 1998-07-15 | 21:49:00 | 1,936 | [
-0.12922878563404083,
-0.07067292928695679,
0.016477731987833977,
0.0003087284858338535,
0.049786392599344254,
0.01792784221470356,
-0.001970370765775442,
-0.01590913161635399,
0.052615366876125336,
-0.11094779521226883,
-0.021920226514339447,
0.011505953967571259,
-0.01814519613981247,
-0... | 30 |
32 | Outburst of MXB 1730-335 | D. Fox, D. Smith, W. Lewin (MIT), and R. Rutledge (Caltech), on behalf of a large collaboration | The Rapid Burster (MXB 1730-335) has been detected by the All-Sky Monitor (2-12 keV) of the Rossi X-ray Timing Explorer satellite (RXTE) in two consecutive 90-second dwells beginning at 18 August 1998 08:40 UT. The source was detected at fitted count rates of 45 and 15 cts/sec (per SSC), respectively, with uncertaintie... | 1998-08-20 12:55:00 | radio,infra-red,x-ray,binary,transient | 1998-08-20 | 12:55:00 | 2,697 | [
-0.02316914312541485,
-0.09555933624505997,
0.013081514276564121,
0.08512674272060394,
0.023593613877892494,
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0.05469445139169693,
0.05876075476408005,
-0.06478599458932877,
-0.01915162056684494,
-0.024463286623358727,
0.04336506500840187,
0.051... | 31 |
33 | HST Observations of the Host Galaxy of GRB970508 | A. Fruchter (STScI) and E. Pian (ITESRE) on behalf of a large international collaboration | The field of GRB970508 was imaged by HST with the STIS CCD in open filter mode (50CCD) on 1998 August 5.78-6.03 for a total exposure time of 11,568 seconds. An extended object, which we believe to be the host galaxy of GRB970508, was detected at the astrometric position of the optical transient of GRB970508. The galaxy... | 1998-08-21 03:49:00 | optical,gamma ray,gamma-ray burst,transient | 1998-08-21 | 03:49:00 | 1,726 | [
-0.0748317688703537,
0.03587178513407707,
0.0005737800383940339,
-0.02134961262345314,
0.03498835116624832,
-0.018683532252907753,
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0.10022550076246262,
0.010343646630644798,
-0.053552769124507904,
-0.021802330389618874,
-0.08537380397319794,
0.02359781414270401,
-0.0... | 32 |
34 | A Possible Optical Counterpart to XTE J1550--564 | Jerome Orosz (Penn State), Charles Bailyn, Raj Jain (Yale) | We report YALO consortium observations using the Yale 1m telescope at Cerro Tololo Interamerican Observatory and the ANDICAM CCD camera. We have identified a possible optical counterpart to the recent X-ray transient XTE J1550-564 (IAUC 7008 ) in V-band images obtained September 8.99 UT. The J2000 coordinates of the ca... | 1998-09-10 10:33:00 | optical,x-ray,star,transient | 1998-09-10 | 10:33:00 | 807 | [
-0.05395451560616493,
-0.026064667850732803,
0.03283469378948212,
-0.007523807231336832,
0.0577060841023922,
-0.08279993385076523,
-0.012525110505521297,
0.058890070766210556,
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0.006754581816494465,
-0.017469951882958412,
-0.035576559603214264,
0.025118421763181686,
-0... | 33 |
35 | Corrected Coordinates for the Possible OC to XTE J1550-56 | Jerome Orosz (Penn State), Charles Bailyn, Raj Jain (Yale) | There was a slight error in the coordinates of the possible optical counterpart to XTE J1550-56 we reported in our previous telegram. The correct J2000 coordinates are RA = 15:50:58.78, DEC = -56:28:35.0. The coordinates printed on the finding chart available at http://www.astro.psu.edu/users/orosz/xte.html has been co... | 1998-09-11 03:36:00 | optical,transient,a comment | 1998-09-11 | 03:36:00 | 403 | [
-0.0891014114022255,
-0.04491528123617172,
0.0742405578494072,
-0.06530684977769852,
0.010504784062504768,
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0.021210797131061554,
0.07475373893976212,
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-0.020246995612978935,
0.027896972373127937,
0.032646048814058304,
-0.013749590143561363,
0.0142... | 34 |
36 | XTE J1946+274 Transient 15.8-s Pulsar (= 3A 1942+274 ?) | D. A. Smith (MIT) & T. Takeshima (NASA/GSFC) | This is an advance copy of an announcement submitted to the IAU Circulars. D. A. Smith (MIT) and T. Takeshima (NASA/GSFC) on behalf of the RXTE/ASM and PCA teams at MIT and GSFC report: The ASM has detected emission from a celestial location that overlaps the previous localization of the 1976 Ariel V transient 3A 1942+... | 1998-09-16 11:38:00 | x-ray,binary,pulsar,transient | 1998-09-16 | 11:38:00 | 1,318 | [
-0.062186963856220245,
-0.001473256153985858,
0.01038406789302826,
0.0555446594953537,
0.02567242458462715,
-0.05147475376725197,
-0.03148916736245155,
0.05950478836894035,
-0.033908337354660034,
0.012698439881205559,
0.042582038789987564,
-0.05113669112324715,
0.0401737242937088,
-0.00373... | 35 |
37 | Transient Black Hole Candidate XTE J1550-564 Brightens to 6.8 Crab | R. Rutledge (Caltech), D. Fox, and D. A. Smith (MIT) | The black hole candidate (BHC) X-ray transient XTE J1550-564 (IAUC # 7008 ) continues to brighten in X-rays, according to RXTE All-Sky Monitor (ASM; 2-12 keV) observations, and at the time of this posting has reached 6.8 Crab (513 +/- 10 cts/sec) in its brightest 90-second ASM dwell.
A total of 113 ASM dwells on the s... | 1998-09-20 06:10:00 | radio,optical,x-ray,binary,black hole,transient,variables | 1998-09-20 | 06:10:00 | 1,983 | [
0.022027499973773956,
-0.01845688186585903,
0.05295485258102417,
0.09057146310806274,
0.04206569120287895,
-0.0777307078242302,
0.01460535079240799,
0.06483082473278046,
0.011981123127043247,
-0.03702901303768158,
-0.048258669674396515,
-0.04960473254323006,
0.07327904552221298,
0.01624047... | 36 |
38 | Optical Observations of GRB981226 | Przemyslaw R. Wozniak (Princeton University Observatory) | Przemyslaw R. Wozniak reports for OGLE team: An attempt to observe optical transient of GRB981226 was made in BeppoSAX 6' radius region reported by Di Ciolo et al. (IAUCirc 7074). On three nights following the announcement, Dec 27-29, approximately between 1:15 and 2:30 UT I collected 10 and 15-minute frames in I band,... | 1998-12-29 13:05:00 | optical,gamma ray,gamma-ray burst,transient | 1998-12-29 | 13:05:00 | 1,079 | [
-0.018045712262392044,
0.030871080234646797,
-0.0049210768193006516,
0.04636748507618904,
0.03127545490860939,
-0.11200053244829178,
-0.011134328320622444,
0.07371440529823303,
0.02141999453306198,
-0.007323008496314287,
-0.04110061749815941,
-0.05657224729657173,
0.052553530782461166,
-0.... | 37 |
39 | Possible microlensing in the Galactic Disk | Andrzej Udalski, Michal Szymanski (Warsaw Univ. Observatory) | A. Udalski and M. Szymanski on behalf of the OGLE microlensing search team report:
The OGLE Early Warning System triggered a microlensing candidate located in the Galactic disk field in Carina. The I=18.0 mag (V=19.6) star designated CAR_SC2 24589 (RA2000=11:07:26.72, DEC2000=-61:22:30.6, l=290.8,b=-1.0) is currently ... | 1999-02-24 18:02:00 | optical,microlensing event,star | 1999-02-24 | 18:02:00 | 1,295 | [
-0.06844574213027954,
0.02508826181292534,
0.020421627908945084,
0.09180714190006256,
0.042697057127952576,
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0.07218138128519058,
0.019712861627340317,
-0.01473294198513031,
-0.05155861750245094,
-0.02419324591755867,
0.0035145634319633245,
-0.00... | 38 |
40 | Outburst from 4U 0115+63 in progress | Wilson, R. B. & B. A. Harmon, NASA/MSFC; M. H. Finger, USRA | An outburst is currently being detected from the Be/x-ray pulsar 4U 0115+63. Pulsations from the source were first detected on Feb 22, 1999, at a frequency of 0.27666170(75) Hz, assuming the binary orbit ephemeris in Bildsten, et al.,1997, Ap J. Suppl. 113,367. The RMS average pulsed flux in the 20-50 keV energy range ... | 1999-03-02 05:59:00 | x-ray,gamma ray,binary,pulsar,transient | 1999-03-02 | 05:59:00 | 679 | [
-0.06086556985974312,
-0.014402960427105427,
0.029611483216285706,
0.02356543578207493,
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0.003136315615847707,
0.006652135401964188,
0.005253367591649294,
-0.04258834570646286,
-0.1127593070268631,
0.03830769285559654,
-0.06... | 39 |
41 | Optical Outburst of Aql X-1 | R. Jain, C. Bailyn (Yale), M. Garcia and K. Rines (CfA), A. Levine (MIT), J. Espinoza and D. Gonzalez (CTIO) | R. Jain and C. Bailyn (Yale); M. Garcia and K. Rines(CfA); A. Levine (MIT); J. Espinoza and D. Gonzalez (CTIO) report YALO consortium observations using the Yale 1-m telescope at CTIO and observations with the 48" telescope at the Whipple Observatory: Aql X-1 = V1333 Aql appears to be beginning a new outburst. This x-r... | 1999-05-11 05:51:00 | optical,x-ray,binary,neutron star,star,transient | 1999-05-11 | 05:51:00 | 1,494 | [
-0.0247648898512125,
-0.06584194302558899,
0.023730937391519547,
0.02810061350464821,
0.02040247805416584,
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0.037021052092313766,
0.01574196293950081,
0.025048736482858658,
-0.03066400997340679,
-0.025669602677226067,
0.06963454186916351,
0.00604... | 40 |
42 | New pulsar 1SAX J1452.8-5949 | M. Orlandini, TeSRE/CNR Bologna; T. Oosterbroek and A. N Parmar, SSD/ESA ESTEC; L. Angelini, NASA/Goddard Space Flight Center, on behalf of the BeppoSAX Galactic Plane Survey Group | M. Orlandini, TeSRE/CNR Bologna; T. Oosterbroek and A.N Parmar, SSD/ESA ESTEC; L. Angelini, NASA/Goddard Space Flight Center, on behalf of the BeppoSAX Galactic Plane Survey Group report the discovery of a 437.4 +/- 1.4 s X-ray pulsar located at R.A. = 14h52m49s, Decl. = -59o49'03" (equinox 2000.0; uncertainty radius 5... | 1999-08-26 15:21:00 | x-ray,pulsar,transient | 1999-08-26 | 15:21:00 | 986 | [
-0.10132130235433578,
-0.010824842378497124,
-0.07422777265310287,
0.015489840880036354,
-0.012678002938628197,
-0.02954038791358471,
-0.0003531244583427906,
0.03850268945097923,
0.00662091001868248,
0.03793991357088089,
0.025875592604279518,
-0.0780404731631279,
0.030630294233560562,
-0.0... | 41 |
43 | SAX J1819.3-2525 (GM Sgr) Brightens to 12 Crab | D. A. Smith, A. M. Levine, and E. H. Morgan (MIT) | SAX J1819.3-2525 (GM Sgr) D. A. Smith, A. M. Levine and E. H. Morgan (MIT) report on behalf of the RXTE All-Sky Monitor (ASM) team at MIT and NASA/GSFC: On 1999 Sep. 15.420 (UT), SAX J1819.3-2525 (= XTE J1819-254), an X-ray transient likely to be associated with the variable star GM Sgr (IAUC 7119 ), was measured by th... | 1999-09-16 01:25:00 | optical,x-ray,star,transient,variables | 1999-09-16 | 01:25:00 | 887 | [
0.00322863576002419,
-0.03664693236351013,
0.059634964913129807,
0.03873458132147789,
0.04190375655889511,
-0.08489692211151123,
0.013317199423909187,
0.05180138349533081,
-0.0164125207811594,
0.0011513561476022005,
-0.034134574234485626,
-0.034615565091371536,
0.11697936803102493,
-0.0145... | 42 |
44 | Palomar Optical Spectrum of GM Sgr in Outburst | S. G. Djorgovski, R. R. Gal, A. Mahabal, T. Galama, J. Bloom, R. Rutledge, S. Kulkarni, F. Harrison (Caltech). | Following the X-ray outburst of GM Sgr (ATEL #43, IAUC # 7119 ) low-resolution spectrum was obtained of GM Sgr on the Hale 200-inch Telescope at Palomar Mountain by S. G. Djorgovski, R. R. Gal, A. Mahabal on 16.25 Sept 1999 UT. The star has extraordinarily strong Balmer emission lines as well as strong He I 5876 Angstr... | 1999-09-17 02:03:00 | optical,x-ray,binary,star,transient | 1999-09-17 | 02:03:00 | 450 | [
-0.044210128486156464,
-0.017835542559623718,
0.001115781837143004,
0.005875998642295599,
-0.0015904851024970412,
-0.05255138874053955,
-0.03157401084899902,
0.03695128485560417,
-0.00017183761519845575,
-0.04890648275613785,
-0.031911734491586685,
-0.007723629008978605,
-0.00083760928828269... | 43 |
45 | Detection and Possible Flare of GM Sgr at 29-34 GHz | B. Mason, S. Kulkarni, R. Rutledge, P. Udomprasert, J. Cartwright, T. Pearson, and A. C.S. Readhead (Caltech) | GM Sgr (SAX J1819.3-2525 = XTE J1819-254) was observed with the OVRO 40m telescope, for 10 1-minute integrations, between Sept 16.15566-16.16340 UT, following reports of the bright X-ray outburst (ATEL #43, IAUC # 7253 ). The observations were made using a dual-beam, Dicke-switching receiver. The source was detected in... | 1999-09-21 00:19:00 | radio,x-ray,binary,transient | 1999-09-21 | 00:19:00 | 1,028 | [
-0.07050658762454987,
-0.040557485073804855,
0.010147071443498135,
0.015292530879378319,
0.05020082741975784,
-0.0932600200176239,
0.02783627063035965,
0.09341844171285629,
-0.058926284313201904,
-0.02598278410732746,
-0.015987277030944824,
-0.029787886887788773,
0.08649956434965134,
-0.04... | 44 |
46 | New Outburst of The Rapid Burster (MXB 1730-335) | D. Fox, W. H. G. Lewin (MIT) | The Rapid Burster (MXB 1730-335) has been detected by the All-Sky Monitor (2-12 keV) of the Rossi X-ray Timing Explorer satellite (RXTE) in nine consecutive 90-second dwells beginning at 30 September 1999 04:46 UT. The source was detected at fitted count rates between 8 and 16 cts/sec (per SSC), with uncertainties of ~... | 1999-10-01 07:10:00 | x-ray,binary,transient | 1999-10-01 | 07:10:00 | 1,343 | [
-0.02038685418665409,
-0.07465056329965591,
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47 | XTE J1859+266 Brightens to 1.4 Crab | D. A. Smith (MIT) | Six 90-s observations of XTE J1859+226 (IAUC # 7274 ) with the RXTE/ASM around 1999 Oct 16.50 (UT) show a mean intensity of 1.37+-0.04 Crab (2-12 keV). The most recent cluster of observations prior to this outburst measured an intensity of 870+-30 mCrab at 1999 Oct 16.115. This value is consistent with the generally li... | 1999-10-17 03:42:00 | x-ray,black hole,transient | 1999-10-17 | 03:42:00 | 582 | [
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48 | Multiwavelength observations of XTE J1859+226 | S. Chaty (Open University) | Multiwavelength observations of the Transient source XTE J1859+226 (IAUC # 7274 ): We have scheduled simultaneous HST and XTE observations of the new X-ray transient XTE J1859+226, planned for October 18th 1999 02:00-09:10 UT. Supporting ground-based observations (simultaneous, near-simultaneous, and following the evol... | 1999-10-17 07:05:00 | radio,millimeter,sub-millimeter,far-infra-red,infra-red,optical,ultra-violet,x-ray,gamma ray,binary,black hole,star,transient,variables | 1999-10-17 | 07:05:00 | 2,110 | [
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49 | Multiwavelength observations of XTE J1859+226 | C. A. Haswell, S. Chaty, A. J. Norton (Open University), W. Chen (NASA/GSFC/U. MD.) and R. I. Hynes (Southampton University) | We have scheduled further simultaneous HST and RXTE observations of the new X-ray transient XTE J1859+226, planned from October 27th 1999 19:26 to October 28th 00:02 UT. Coordinated multi-wavelength observations (simultaneous, near-simultaneous, and following the evolution over days/weeks) would be extremely helpful.
... | 1999-10-22 00:46:00 | radio,millimeter,sub-millimeter,far-infra-red,infra-red,optical,ultra-violet,x-ray,gamma ray,binary,black hole,neutron star,star,transient,variables,request for observations | 1999-10-22 | 00:46:00 | 1,739 | [
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50 | Optical and near-IR observations of XTE J1859+226 | R. I. Hynes (Southampton University), C. A. Haswell, A. J. Norton, S. Chaty, D. J. Rolfe, D. A. Lott (Open University), J.-E. Solheim, R. Ostensen (Tromso University), R. A. Garcia (CEA Saclay), R. Fried (Flagstaff), K. O'Brien, K. Horne (St Andrews University), Z. Ioannou (Keele), A. Shafter (San Diego State Universit... | Following optical and near-infrared monitoring of XTE J1859+226 (IAUC # 7279 , # 7284 ), HST/STIS observations were performed on Oct 18.10-18.38 spanning 112-1026nm. The UV spectrum shows broad (12000km/s FWZI) and deep Lyman alpha absorption, strong CIV 155nm emission (EW 1.1nm, 4000km/s FWZI) and weaker emission line... | 1999-10-28 23:39:00 | radio,millimeter,sub-millimeter,far-infra-red,infra-red,optical,ultra-violet,x-ray,gamma ray,binary,black hole,neutron star,star,transient,variables,request for observations,a comment | 1999-10-28 | 23:39:00 | 1,664 | [
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51 | Multiwavelength observations of XTE J1859+226 on 1999, November 6th | C. A. Haswell, S. Chaty, A. J. Norton (Open University), W. Chen (NASA/GSFC/U. MD.) and R. I. Hynes (Southampton University) | Further simultaneous HST and RXTE observations (visit #3) of the new X-ray transient XTE J1859+226 are scheduled for November 6th 1999 19:37 - 22:22 UT. Coordinated multi-wavelength observations (simultaneous, near-simultaneous, and following the evolution over days/weeks) would be extremely helpful.
If you can observ... | 1999-11-04 20:28:00 | radio,millimeter,sub-millimeter,far-infra-red,infra-red,optical,ultra-violet,x-ray,gamma ray,binary,black hole,transient,variables,request for observations,a comment | 1999-11-04 | 20:28:00 | 1,654 | [
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52 | 2S 1417-624 Outburst | Mark H. Finger | Hard X-ray pulses from the Be/X-ray transient pulsar 2S 1417-624 are currently begin detected by BATSE on CGRO. The first detection was on November 12. The average pulsed flux is 16+-3 mCrab (20-50 keV). After correction with the binary orbit of Finger et al. (1996, A&A Supp. 120, 209) the pulse timing from November 12... | 1999-11-20 06:52:00 | x-ray,binary,pulsar,transient | 1999-11-20 | 06:52:00 | 466 | [
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... | 51 |
53 | Correction to ATEL# 52 | Mark H. Finger | In ATEL #52 the spin frequency of 2S 1417-624 was incorrectly given as 56.99490(9) Hz. The correct value is 56.99490(9) mHz. | 1999-11-24 02:38:00 | x-ray,binary,pulsar,transient | 1999-11-24 | 02:38:00 | 124 | [
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-0.082... | 52 |
54 | Enhanced Radio Activity in the Quiescent State of the X-ray Transient V404 Cyg (=GS2023+338) | R. M. Hjellming, M. P. Rupen (NRAO), A. J. Mioduszewski (U. Sydney), R. Narayan (Harvard Univ.) | The quiescent state of the X-ray transient and 14 solar mass black hole binary, V404 Cyg (=GS2023+338), since it ended the long decay that accompanied its initial discovery event at X-ray, optical, and radio wavelengths (Han and Hjellming, Ap.J., 400, 304, 1992), has been associated with a 0.4 mJy radio source and, mos... | 2000-03-01 01:36:00 | radio,optical,x-ray,binary,black hole,transient,request for observations | 2000-03-01 | 01:36:00 | 1,083 | [
-0.020370356738567352,
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0... | 53 |
55 | Multiwavelength observations of XTE J1859+226 | C. A. Haswell, S. Chaty (Open University), W. Cui (NASA/GSFC/U. MD.), J. V. Casares (IAC), and R. I. Hynes (Southampton University) | On March 2 06:00 UT the transient source XTE J1859+226 had faded considerably to R=18.0 in the optical (IAC) and to a flux of about 13 mCrab (RXTE ASM). However, it clearly remains active in the X-rays. From extrapolating the last spectrum obtained with HST on 2000, February 8th we predict the following approximate mag... | 2000-03-04 09:08:00 | radio,millimeter,sub-millimeter,far-infra-red,infra-red,optical,ultra-violet,x-ray,gamma ray,binary,black hole,neutron star,star,transient,request for observations,a comment | 2000-03-04 | 09:08:00 | 1,732 | [
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56 | Optical Photometry of V404 Cyg (=GS2023+338) | R. M. Wagner (LBTO/U. Arizona), C. R. Shrader (NASA/GSFC), and S. G. Starrfield (Arizona State U.) | In response to the request by Hjellming et al. in ATEL #54, Rose Finn (Steward Observatory/U. Arizona) obtained for us two R-band CCD images of V404 Cyg (=GS2023+338) on 2000 Mar 3.52 UT with the Steward Observatory Bok 2.3-m telescope and direct CCD (scale = 0.3 arcsec/pixel, airmass = 1.8, seeing = 1.7 arcsec FWHM). ... | 2000-03-08 06:33:00 | radio,infra-red,optical,x-ray,binary,black hole,star,transient | 2000-03-08 | 06:33:00 | 1,648 | [
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57 | New Outburst of MXB 1730-335 | Derek W. Fox & Walter H. G. Lewin (MIT) | A Rossi X-ray Timing Explorer Proportional Counter Array (2-60 keV) observation of the source 4U 1728-34, beginning 25 March 2000 20:35 UT, has revealed the Rapid Burster (MXB 1730-335) to be in outburst. Strong (10,000 PCA cts/sec ~ 0.8 Crab) flat-topped bursts, lasting 100-300 seconds and repeating at 500-1000 second... | 2000-03-27 07:27:00 | radio,infra-red,x-ray,binary,neutron star,star,transient,request for observations | 2000-03-27 | 07:27:00 | 1,167 | [
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58 | Likely New Outburst from XTE J1550-564 | D. A. Smith, A. M. Levine, R. Remillard, and D. Fox (MIT), and R. Schaefer (NASA/GSFC) | Observations over 2000 April 6-10 with the RXTE All-Sky Monitor show a clear detection of a source with maximum likelihood position 1 +- 3 arcmin from the position of XTE J1550-564 (IAUC # 7009 ). It is therefore highly likely that we have detected renewed activity of XTE J1550-564. A 2-12 keV light curve from this loc... | 2000-04-11 00:30:00 | x-ray,binary,black hole,transient,request for observations | 2000-04-11 | 00:30:00 | 782 | [
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59 | Mini-outburst of Aql X-1 | R. Jain, C. Bailyn and P. Coppi, (Yale); M. Garcia, (CfA); A. Levine, (MIT); J. Orosz, (Utrecht); P. Lu, (Western Connecticut State); and J. Espinoza and D. Gonzalez,(CTIO) | We report YALO consortium observation of a mini-outburst of Aquila X-1 = V1333 Aql, which occurred between July 04.27 and 07.29 UT. This X-ray binary outbursts approximately once per year, and most recently entered a mini-outburst during May 2000 (IAUC 7423 , 7429 ). We have been monitoring this source since April 5 in... | 2000-07-11 03:50:00 | optical,x-ray,binary,neutron star,star,transient | 2000-07-11 | 03:50:00 | 715 | [
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60 | Black Hole Candidate XTE J1859+226 in the Low/Hard State | J. M. Miller, D. W. Fox, D. Pooley, W. H. G. Lewin (MIT) | Recent flaring activity of this source in the optical (Casares et al. 2000, IAUC # 7451 ) has motivated a public RXTE TOO observation on 8 July 2000.
XTE J1859+226 is a known X-ray nova that reached 1.4 Crab in the RXTE/ASM in October 1999 (Smith 1999, ATEL #47). During that outburst the source exhibited 150 and 187 H... | 2000-07-17 04:47:00 | radio,optical,x-ray,binary,black hole,nova,transient,request for observations | 2000-07-17 | 04:47:00 | 982 | [
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61 | Recurrence of Radio Counterpart of V4641 Sgr (=XTE J1819-254) | R. M. Hjellming (NRAO) | On 2000 July 17.23 UT VLA 1-km array observations detected recurrence of radio emission from V4641 Sgr (=XTE J1819-254) at a level of 1.6 mJy at 8.4 GHz. On July 18.13 UT it was 0.6, 0.9, 1.1, and 1.2 mJy at 1.49, 4.9, 8.4, and 14.9 GHz, corresponding to a spectrum of ~0.53*nuGHz^(-0.35) mJy. This is much weaker than t... | 2000-07-18 23:23:00 | radio,black hole,star,transient,request for observations | 2000-07-18 | 23:23:00 | 744 | [
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62 | Error in ATEL #61: Recurrence of Radio Counterpart of V4641 Sgr (=XTE | R. M. Hjellming (NRAO) | In ATEL #61 the radio fluxes for 2000 July 18.13 UT were correct, but the formula for the spectral fit should have been 0.53*nuGHz^(0.35) mJy | 2000-07-19 00:15:00 | radio,black hole,transient,request for observations | 2000-07-19 | 00:15:00 | 141 | [
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-0.038... | 61 |
63 | Aql X-1 in Brightest X-ray Outburst of RXTE Era | R. E. Rutledge (Caltech) | Following the optical outburst reported by Jain et al (IAUC # 7495 ), the type-I X-ray bursting low mass X-ray binary transient Aql X-1 (V1333 Aql) has been detectable (>3 sigma) in the one-day average countrate measured with RXTE/ASM since 22 Sept 2000, according to the quicklook data. By 06 Oct 2000, the 1-day averag... | 2000-10-21 08:31:00 | optical,x-ray,binary,neutron star,star,transient,request for observations | 2000-10-21 | 08:31:00 | 765 | [
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0.0... | 62 |
64 | A Black Hole in XTE J1118+480 | J. McClintock, M. Garcia, P. Zhao, N. Caldwell, and E. Falco; Harvard-Smithsonian Center for Astrophysic | Spectroscopic observations of this X-ray nova with the new 6.5-m MMT on Dec. 1 & 4 show that it contains a black hole primary of at least 6 solar masses. Our prior photometric observations using the FLWO 1.2-m telescope showed that the X-ray nova was near its pre-outburst brightness (IAUC 7390 ) at V = 18.8 on Oct. 26.... | 2000-12-14 01:44:00 | x-ray,black hole,nova,transient | 2000-12-14 | 01:44:00 | 1,256 | [
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65 | High Enerygy Outburst in BL Lac object Mkn 421 | R. Remillard (MIT), H. G. Boerst (University of Kiel), N. Goetting (University of Hamburg) | Following the detection of enhanced X-ray emission from the BL Lac object Markarian 421 with the RXTE All Sky Monitor on, observations with the Cherenkov telescopes of HEGRA (La Palma, Canary Islands, Spain) show very strong TeV activity. Above a threshold energy of 500 GeV, daily integrated fluxes (20 minute averages)... | 2001-01-23 08:16:00 | x-ray,tev,agn | 2001-01-23 | 08:16:00 | 750 | [
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0.0196313... | 64 |
66 | Black-Hole Candidate GRS 1758-258 Enters an "Off" State | D. M. Smith, Space Sciences Laboratory, U. C. Berkeley; W. A. Heindl, Center for Astrophysics and Space Science, U. C. San Diego; C. B. Markwardt and J. H. Swank, NASA Goddard Space Flight Center | Twice-weekly observations of the black hole candidate GRS 1758-258 with the Proportional Counter Array (PCA) on RXTE have revealed that the source has undergone a dramatic drop in hard x-ray flux for the first time since GRANAT/Sigma saw it disappear (40-150 keV) in 1991/92 (M. Gilfanov et al. 1993, ApJ 418,844). Measu... | 2001-03-13 09:18:00 | radio,optical,x-ray,gamma ray,binary,black hole | 2001-03-13 | 09:18:00 | 2,593 | [
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0.0077275... | 65 |
67 | The spectroscopic mass ratio of the black hole binary XTE J1118+480 | Jerome A. Orosz (Utrecht University) | I obtained spectra of the black hole binary XTE J1118+480 with the 4.2 meter William Hershel Telescope on La Palma February 16/17, 2001. The instrumental configuration was the red arm of ISIS and the R600R grating, which yielded wavelength coverage from 5850 to 6650 Angstroms at a resolution of 1.55 Angstroms FWHM. A t... | 2001-05-03 19:34:00 | optical,binary,black hole,star,transient | 2001-05-03 | 19:34:00 | 1,396 | [
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68 | A superburst from GX 3+1 | Erik Kuulkers (SRON & Utrecht University) | A search through the publicly available RXTE/ASM database of GX 3+1 revealed a single flare with an observed peak flux of ~1.1 Crab and a duration of a few hours. The flare started between 1998 June 8 22:53 and 1998 June 9 00:52 (UT). During the exponential decay, with an e-folding time of 1.6+/-0.2 hrs (1.5-12 keV), s... | 2001-05-18 20:57:00 | x-ray,binary,neutron star,star | 2001-05-18 | 20:57:00 | 1,083 | [
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0.02386193536221981,
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-0.000117121497169137,
0.015821615234017372,
-0.04736809432506561,
-0.06983568519353867,
0.037262871861457825,
0.0102... | 67 |
69 | A Sudden State Change in 1E 1740.7-2942 | D. M. Smith, Space Sciences Laboratory, U. C. Berkeley; W. A. Heindl, Center for Astrophysics and Space Science, U. C. San Diego; C. B. Markwardt and J. H. Swank, NASA Goddard Space Flight Center | The black hole candidate 1E 1740.7-2942 has made the most abrupt spectral transition since the beginning of an RXTE/PCA monitoring campaign in Feb. 1996. It transitioned from a soft power law of index -2.2 on May 12 to a hard power law of index -1.5 on May 14. It had reached the -2.2 index via two months of gradual sof... | 2001-05-22 04:59:00 | radio,x-ray,binary,black hole | 2001-05-22 | 04:59:00 | 2,512 | [
-0.06918813288211823,
-0.0689539983868599,
0.06279703974723816,
0.18309777975082397,
0.052452389150857925,
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0.03984246775507927,
0.02585151046514511,
-0.03964047506451607,
-0.03843783959746361,
-0.01826857402920723,
-0.04728616029024124,
0.014584... | 68 |
70 | Dynamical Evidence for a Black Hole in the Microquasar XTE J1550-564 | Jerome A. Orosz (Utrecht), Michiel van der Klis (Amsterdam), Jeffrey E. McClintock (CfA), Raj K. Jain (Yale), Charles D. Bailyn (Yale), Ronald A. Remillard (MIT) | We obtained direct CCD images and time series spectroscopy of the microquasar XTE J1550-564 on May 24-27, 2001 using the FORS1 instrument on Antu, which is the first 8.2 meter telescope at the European Southern Observatory, Paranal (visitor program 67.D-0229(A)). We obtained a total of 18 spectra covering a wavelength ... | 2001-05-31 02:40:00 | optical,x-ray,binary,black hole,neutron star,star,transient | 2001-05-31 | 02:40:00 | 2,001 | [
-0.024210572242736816,
-0.0290688369423151,
0.024634812027215958,
-0.02730618789792061,
0.04322785139083862,
-0.0077817365527153015,
-0.001617545960471034,
0.07504576444625854,
-0.0004192657652311027,
0.0504942424595356,
-0.07624486833810806,
-0.016525892540812492,
-0.030849911272525787,
0... | 69 |
71 | GRS1915+105 outburst | R. Remillard (MIT) for RXTE ASM team at MIT and GSFC | The latest data points from the RXTE All-Sky Monitor indicate that GRS1915+105 is rising out of the low-hard state, where it had been for the last 14 days with a mean flux of 0.39 mCrab at 2-12 keV. On 2001 July 15, the X-ray flux (2-12 keV) increased from 0.44 Crab (02:50 UT) to 0.73 Crab (07:30 UT). Previous breakout... | 2001-07-16 01:24:00 | radio,infra-red,x-ray,binary,black hole,transient,request for observations | 2001-07-16 | 01:24:00 | 525 | [
-0.07647820562124252,
-0.04351933300495148,
-0.014456269331276417,
0.039966389536857605,
0.06504508852958679,
-0.06126783788204193,
-0.017762236297130585,
0.09539158642292023,
-0.04772770032286644,
-0.07032059878110886,
-0.03214182332158089,
-0.039249908179044724,
0.015305639244616032,
0.0... | 70 |
72 | The likely optical counterpart of X-ray transient KS 1731-260 | Rudy Wijnands (MIT), Paul J. Groot (CfA), Jon J. Miller (MIT), Craig Markwardt (GSFC), Walter H. G. Lewin (MIT), Michiel van der Klis (Amsterdam) | During our 27 March 2001 Chandra observation of the neutron star X-ray transient KS 1731-260, two X-ray sources were detected (Wijnands et al. 2001, ApJL submitted, astro-ph/0107380). One of those sources is very likely a star in the USNO A2.0 optical catalog (Monet et al. 1998, USNO-SA2.0, U.S. Naval Observatory, Wash... | 2001-07-26 05:04:00 | optical,x-ray,binary,neutron star,star,transient | 2001-07-26 | 05:04:00 | 2,015 | [
-0.07943452149629593,
-0.06212441995739937,
-0.012281885370612144,
0.013243189081549644,
0.038151975721120834,
-0.04419601708650589,
0.007430949714034796,
-0.010590720921754837,
0.0007560659432783723,
-0.011361652985215187,
0.033043548464775085,
-0.008986517786979675,
0.0347401462495327,
-... | 71 |
73 | Brightening of WZ Sge | P. Rodriguez-Gil, D. Martinez-Delgado, J. Casares, C. Zurita, I. G. Martinez-Pais, T. Shahbaz; Instituto de Astrofisica de Canarias (IAC) | We report on a sudden brightening of the dwarf nova WZ Sge during decline from outburst (cf. IAUC # 7669 , IAUC # 7670 ). The observations were made with the 0.82-m IAC80 telescope at Teide Observatory (Tenerife, Spain). The object has risen approximately two magnitudes, and CCD photometry gives B=11.33 +/- 0.01 and R=... | 2001-08-22 08:53:00 | optical,cataclysmic variable,nova,variables | 2001-08-22 | 08:53:00 | 491 | [
-0.03913239389657974,
0.024840446189045906,
0.11479354649782181,
0.110056571662426,
0.023372836410999298,
-0.05192752555012703,
-0.0725543275475502,
0.035219188779592514,
0.02610880322754383,
0.03449878841638565,
-0.06384129077196121,
-0.021890077739953995,
-0.009812508709728718,
-0.051513... | 72 |
74 | Outburst of the X-ray transient in NGC 6440 and identification of the optical and quiescent X-ray counterparts | Jean in 't Zand (SRON, Utrecht), Dave Pooley and Walter Lewin (MIT), Marten van Kerkwijk and Frank Verbunt (University Utrecht) | We have obtained observations with ESO NTT SUSI2 in B and R and with Chandra ACIS-S of the transient in NGC6440, which is in outburst again since before 2001 Aug 14, as discovered with RXTE ASM (http://xte.mit.edu/asmlc/ASM.html). The Chandra position of the transient coincides with the brightest source (of some 20 det... | 2001-08-31 20:24:00 | optical,x-ray,binary,globular cluster,neutron star,star,transient,variables | 2001-08-31 | 20:24:00 | 1,118 | [
-0.09479723870754242,
-0.04365959390997887,
0.022106952965259552,
0.09219293296337128,
0.012119858525693417,
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-0.009906136430799961,
0.04719025641679764,
0.0018883097218349576,
0.015850014984607697,
0.042868711054325104,
-0.008170300163328648,
0.016724729910492897,
-0... | 73 |
75 | Infrared Observations of the Neutron Star X-ray Transient KS 1731-260 | Jerome A. Orosz (Utrecht University), Charles D. Bailyn and Katie Whitman (Yale University) | We have obtained J-band images of the field of the neutron star X-ray transient KS 1731-260 on July 13, 2001 using the YALO 1m telescope at Cerro Tololo Interamerican Observatory and the ANDICAM optical/IR camera. We compared our image with the J-band image obtained June 1, 1996 with the Canada-France-Hawaii Telescope ... | 2001-09-06 22:54:00 | infra-red,optical,x-ray,binary,neutron star,star,transient,variables | 2001-09-06 | 22:54:00 | 1,638 | [
-0.05263599753379822,
-0.017146704718470573,
0.009492659009993076,
0.0346607007086277,
0.015293996781110764,
-0.038241103291511536,
0.022766627371311188,
0.11317488551139832,
-0.006950782146304846,
-0.047783154994249344,
-0.046687591820955276,
0.021403353661298752,
0.08858893066644669,
-0.... | 74 |
76 | X-ray Transients in M31 | A. Kong, M. Garcia, S. Murray, F. Primini, J. McClintock and R. Di Stefano (Harvard-Smithsonian Center for Astrophysics) | A bright X-ray transient in M31 was detected in a 5000-sec Chandra ACIS-I observation on 2001 Aug 31.54 UT. The new transient (CXOU J004305.5+411703) is located at R.A. = 00h43m05s.55, Decl = +41o17'03''.3 (equinox 2000.0; based on the aspect solution, with uncertainty of ~1''). The energy spectrum can be fitted with a... | 2001-09-13 07:47:00 | x-ray,transient | 2001-09-13 | 07:47:00 | 1,346 | [
-0.04497003182768822,
-0.0276678204536438,
0.028742805123329163,
0.09446434676647186,
0.016597742214798927,
-0.07466322183609009,
0.01545039378106594,
0.058473870158195496,
0.05684240534901619,
-0.033379871398210526,
0.05337000638246536,
-0.06261415034532547,
0.038628123700618744,
-0.04067... | 75 |
77 | Outburst of 4U 1608-522 Detected with RXTE/ASM | Robert E. Rutledge (Caltech) | The quicklook data from the RXTE/ASM indicate that the neutron star transient low mass X-ray binary 4U 1608-522 (QX Nor) has left quiecence and begun an X-ray outburst. Two ASM dwells on 2001 Nov 2 11:54-13:30 UT detected the source at 7.9+/-1.5 and 4.5+/-1.9 ASM c/s (1 Crab=73 ASM c/s). Five days later (Nov 7 10:56-10... | 2001-11-08 02:52:00 | optical,x-ray,binary,neutron star,star,transient | 2001-11-08 | 02:52:00 | 1,032 | [
-0.009787571616470814,
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0.015928305685520172,
0.1031482145190239,
0.04921141639351845,
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0.11941616982221603,
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-0.04465361312031746,
0.016787979751825333,
-0.005442026536911726,
0.10086772590875626,
0.0186... | 76 |
78 | Leonid Fireballs 2001 | R. J. Nemiroff, D. Perez-Ramirez, W. Pereira, J. B. Rafert, C. Ftaclas (Michigan Tech) & S. Ashe on behalf of the CONCAM team | All four CONCAMs that compose our current global network of continuously operating fisheye CCD cameras have recorded numerous fireballs during the recent peak of the 2001 Leonid Meteor Shower. A preliminary list of fireballs is listed below, each of which received over 10,000 raw counts (uncorrected for zenith angle) d... | 2001-11-24 02:02:00 | optical,meteor | 2001-11-24 | 02:02:00 | 1,949 | [
0.025001414120197296,
-0.005133848171681166,
0.04421620070934296,
-0.02610701136291027,
0.09269623458385468,
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0.04275074601173401,
0.02955693192780018,
0.017710771411657333,
-0.02388402633368969,
-0.060901690274477005,
-0.04993503540754318,
-0.003124753711745143,
0.01... | 77 |
79 | X-ray Transients in M31 | M. Garcia, A. Kong, F. Primini, J. McClintock, S. Murray, and R. DiStefano; Harvard-Smithsonian Center for Astrophysics | On Nov 19, 2001, The Chandra X-ray Observatory surveyed M31 with 5 overlapping very short (1ks) HRC exposures and a single short (5ks) ACIS-S exposure. Preliminary analysis allows us to report the following concerning possible X-ray transients within M31.
A new source CXOU J004428.4+415628 (RA=00:44:28.4, DEC=+41:56:2... | 2001-12-11 04:41:00 | x-ray,black hole,neutron star,star,transient | 2001-12-11 | 04:41:00 | 3,221 | [
-0.10882584005594254,
-0.030069895088672638,
-0.03916908800601959,
0.0741540864109993,
0.02850133180618286,
-0.08317739516496658,
-0.0023833471350371838,
0.048541806638240814,
0.03325192257761955,
0.00957539863884449,
0.05290747433900833,
-0.06432092934846878,
0.04430193826556206,
-0.05445... | 78 |
80 | MCQC J162847-4152 - a Possible Brightest Microquasar found | G. S. Tsarevsky (ATNF, Sydney, & ASC, Moscow), N. S. Kardashev (ASC), R. A. Stathakis (AAO, Sydney), O. B. Slee (ATNF), R. Ojha (ATNF) | MCQC J162847-4152 is one of 40 objects found in the course of our systematic and complete survey for new microquasars in the whole Galactic plane (see project description in astro-ph/0110511). It is optically brightest and mostly definite microquasar candidate in the list, which we describe as follows: 1) It is a brigh... | 2001-12-11 18:19:00 | radio,millimeter,infra-red,optical,x-ray,binary,black hole,neutron star,star,transient,variables,request for observations | 2001-12-11 | 18:19:00 | 885 | [
-0.010051613673567772,
-0.06080698221921921,
-0.029512716457247734,
0.004042082466185093,
0.04262801632285118,
-0.013872716575860977,
0.009923839941620827,
0.0950031578540802,
0.021206414327025414,
0.060670506209135056,
-0.0628851056098938,
0.01100295688956976,
0.0177757628262043,
0.020627... | 79 |
81 | X-ray Absorption Lines in the Galactic Black Hole Candidate XTE J1650-500 | Jon Miller (MIT), Rudy Wijnands (MIT), Patrick Wojdowski (MIT), Paul Groot (CfA), Andrew Fabian (Cambridge), Michiel van der Klis (Amsterdam), and Walter Lewin (MIT), on behalf of a larger collaboration | We report the first convincing detection of narrow features in the grating-resolution X-ray spectrum of a transient low-mass X-ray binary and Galactic black hole candidate. XTE J1650-500 was discovered by Remillard (2001, IAU Circ. 7707) with the All Sky Monitor aboard the Rossi X-ray Timing Explorer (RXTE), and identi... | 2002-01-16 06:44:00 | optical,x-ray,binary,black hole,star,transient | 2002-01-16 | 06:44:00 | 3,217 | [
-0.029523609206080437,
-0.0065847355872392654,
-0.004152227658778429,
0.056058477610349655,
0.07436726242303848,
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0.019514886662364006,
0.029510069638490677,
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-0.0921291634440422,
-0.0782724916934967,
-0.07265455275774002,
-0.004013701807707548,
0.... | 80 |
82 | X-ray Transients in M31 | M. R. Garcia, A. K.H. Kong, J. E. McClintock, F. A. Primini, P. Kaaret and S. S. Murray (Harvard-Smithsonian Center for Astrophysics) | Chandra observations on Jan 16, 2002 surveyed M31 with a series of 5 short (1ks) HRC images. Preliminary analysis yields the following info on new transients and highly variable sources:
A new source CXOU J004307.0+411809 (RA=00h43m07s.099, DEC=+41o18'09".95, +/- 1", J2000) is discovered at a luminosity of 2.7 x 1037 ... | 2002-02-09 05:59:00 | x-ray,black hole,neutron star,star,transient,variables | 2002-02-09 | 05:59:00 | 2,312 | [
-0.0949530303478241,
-0.03772599622607231,
0.01013999618589878,
0.13847053050994873,
0.032465919852256775,
-0.09299930930137634,
-0.0022139414213597775,
0.09348978847265244,
0.039020195603370667,
0.020774373784661293,
0.042893074452877045,
-0.04719088226556778,
0.01006183959543705,
-0.0495... | 81 |
83 | Aquila X-1 Outburst | J. H. Swank, E. A. Smith (GSFC) | RXTE observations indicate that Aquila X-1 has begun an X-ray outburst. The ASM reported a level of 33 mCrab during the period 2002 Feb 12-15. On Feb 15.6 UT the flux began a rise at the rate of 8.3 ASM counts/s (112 mCrab) per day. The PCA observed a rise from 75 to 120 mCrab Feb 16.03-16.25. One X-Ray burst was obser... | 2002-02-17 05:53:00 | x-ray,binary,transient | 2002-02-17 | 05:53:00 | 391 | [
-0.012254253029823303,
-0.04343061521649361,
0.030160199850797653,
0.02837904542684555,
0.008768982253968716,
-0.040337465703487396,
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0.09162082523107529,
-0.012821434997022152,
0.006855209358036518,
-0.03315895423293114,
-0.027732450515031815,
0.10279173403978348,
-0... | 82 |
84 | A search for the optical counterpart of SAX J1805.5-2031 | C. R. Powell, A. J. Norton, C. A. Haswell (Open University), S. T. Hodgkin (Cambridge) | The X-ray transient SAX J1805.5-2031 was reported in IAUC # 7843 on 6 March 2002, with R.A. = 18h05m34s, Decl. = -20o30'.8 (equinox 2000), uncertainty 1'.8. We took CCD photometry of this region in R, V, and B on 2002 March 8 around 06:00 UT, and March 9 between 05:20 and 06:30 UT, with the Jacobus Kaptyn Telescope. No... | 2002-03-23 00:45:00 | optical,x-ray,binary,star,transient,variables,a comment | 2002-03-23 | 00:45:00 | 850 | [
-0.08340922743082047,
0.0027671789284795523,
0.04923904314637184,
0.03335968032479286,
0.05164515599608421,
-0.07707187533378601,
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0.024226969107985497,
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0.03473067656159401,
-0.06836749613285065,
-0.02115822024643421,
0.06488532572984695,
-0.0463... | 83 |
85 | Outburst of GX 339-4 | D. M. Smith (Space Sciences Laboratory, U. C. Berkeley), J. H. Swank (NASA/Goddard), W. A. Heindl (Center for Astrophysics and Space Science, U. C. San Diego), and R. A. Remillard (MIT) | Observations with the Rossi X-ray Timing Explorer (RXTE) show that the suspected black-hole binary GX 339-4 has become active after three years in quiescence. At 15:30 UT on 3/26/02, the Proportional Counter Array (PCA) measured an unabsorbed flux of 9.4 x 10^-11 ergs/cm2/s from 2-10 keV, about an order of magnitude hi... | 2002-04-04 03:42:00 | radio,infra-red,optical,x-ray,gamma ray,binary,black hole,transient,request for observations | 2002-04-04 | 03:42:00 | 1,109 | [
-0.021567774936556816,
-0.030289137735962868,
-0.03360654041171074,
0.11138228327035904,
0.05372407287359238,
-0.07454679161310196,
0.030058685690164566,
0.04212924838066101,
0.025658292695879936,
-0.06486871093511581,
-0.03515544906258583,
-0.033094946295022964,
0.006579732522368431,
-0.0... | 84 |
86 | Search for an Optical Counterpart of XTE J1908+094 | R. M. Wagner (LBTO) and S. Starrfield (ASU) | We obtained R-band imagery of the X-ray error box of the black hole candidate XTE J1908+094 (IAUC # 7856 , # 7861 , and # 7873 ) on 2002 April 11.44 UT with the Hiltner 2.4-m telescope and 8K CCD camera at the MDM Observatory on Kitt Peak. At the location of the possible radio counterpart reported by Rupen, Dhawn, and ... | 2002-04-13 15:30:00 | radio,infra-red,optical,x-ray,black hole,cataclysmic variable,neutron star,star,transient,variables | 2002-04-13 | 15:30:00 | 611 | [
-0.02529112622141838,
-0.030051052570343018,
-0.03931692987680435,
0.030406488105654716,
0.03921037167310715,
-0.02119682915508747,
0.009844131767749786,
0.09215547144412994,
-0.03967232257127762,
-0.03835679218173027,
-0.08075720071792603,
-0.02530992589890957,
0.04177670553326607,
-0.030... | 85 |
87 | Optical Counterpart of the Millisecond Pulsar XTE J1751-305 | A. K.H. Kong, P. Challis, M. R. Garcia and R. Kirshner (Harvard-Smithsonian Center for Astrophysics) | We have obtained I-band images for the new accreting millisecond pulsar XTE J1751-305 (IAUC# 7867 ,# 7870 ,# 7872 ,# 7874 ,# 7876 ) with the 6.5-m Baade telescope and the MagIC CCD camera at the Las Campanas Observatory on 2002 April 14. At the position of the possible infrared counterpart (IAUC# 7874 ), we found no op... | 2002-04-17 10:07:00 | radio,infra-red,optical,x-ray,binary,pulsar,transient | 2002-04-17 | 10:07:00 | 847 | [
-0.08753693848848343,
-0.07123256474733353,
-0.07313448935747147,
-0.0014063885901123285,
-0.008291405625641346,
-0.09202232956886292,
0.03548626974225044,
0.03531193360686302,
-0.010304002091288567,
-0.002553325379267335,
0.02131771482527256,
-0.0883287563920021,
-0.04082992300391197,
-0.... | 86 |
88 | XTE J1901+014: a new, fast X-ray transient | Ron Remillard (M. I.T.) and Don Smith (U. Michigan) | The RXTE All-Sky Monitor has discovered a fast X-ray transient that was initially thought to be a gamma ray burst, reported on the GCN network as GRB020406. The event began on 2002 April 6.76268, lasting more than 2 min and less than 3.15 hr, with a peak flux of 0.9 Crab (2-12 keV). (see http://xte.mit.edu/xtej1901+104... | 2002-04-18 02:50:00 | radio,optical,x-ray,gamma ray,binary,black hole,gamma-ray burst,transient | 2002-04-18 | 02:50:00 | 1,252 | [
-0.047907765954732895,
-0.034128338098526,
0.0689101442694664,
0.017699962481856346,
0.05798867344856262,
-0.05883384123444557,
-0.01388593576848507,
0.07561226934194565,
-0.014447592198848724,
-0.028290651738643646,
-0.00835838820785284,
-0.004702001344412565,
0.07802914828062057,
0.01444... | 87 |
89 | XTE J1901+014 is 1RXS J190141.0+012618 ? | Rudy Wijnands (MIT) | Using the ROSAT All-Sky Survey Source Catalogue, it was found that the ROSAT source 1RXS J190141.0+012618 is located in the RXTE/ASM error box of XTE J1901+014 (ATEL 88) and at the edge of the Einstein error circle. The PSPC position listed in the Catalogue is 19h01m41.0s, +1 26' 18" (1 sigma error radius of 12") and t... | 2002-04-18 05:52:00 | x-ray,binary,black hole,transient,request for observations | 2002-04-18 | 05:52:00 | 962 | [
-0.08340570330619812,
-0.023177625611424446,
-0.07804644107818604,
0.04058118164539337,
0.11616398394107819,
-0.06591257452964783,
0.03306593745946884,
0.1052687019109726,
0.04175245389342308,
-0.013039696961641312,
0.040000203996896744,
0.015964997932314873,
0.04518121853470802,
-0.031979... | 88 |
90 | The XMM-Newton/EPIC-pn Spectrum of the Millisecond X-ray Pulsar XTE J1751-305 in Outburst | Jon M. Miller (MIT), Eckhard Kendziorra (Tuebingen Univ.), Marcus Kirsch (SOC/ESA), Rudy Wijnands (MIT), Mariano Mendez (SRON), Michael Nowak (MIT), Bryan Gaensler (Harvard-Smithsonian CfA), Deepto Chakrabarty (MIT), and Walter H. G. Lewin (MIT) | We have performed a preliminary analysis of the XMM-Newton/EPIC-pn spectrum of the accreting millisecond X-ray pulsar XTE J1751-305 (Markwardt and Swank, 2002, and in't Zand et al. 2002, IAUC 7867 ; Ehle et al. 2002, IAUC 7872 ; Markwardt and Swank, 2002, IAUC 7876 ). The observation started on 2002 April 07.54 and las... | 2002-04-27 03:33:00 | x-ray,binary,neutron star,pulsar,star,transient | 2002-04-27 | 03:33:00 | 1,893 | [
-0.08254025131464005,
-0.020618099719285965,
-0.01814555749297142,
0.07708190381526947,
-0.0008977887919172645,
-0.02805863693356514,
0.004879485350102186,
0.02737477235496044,
-0.028280900791287422,
-0.014785015024244785,
0.03708602115511894,
-0.10276719927787781,
0.009952371940016747,
-0... | 89 |
91 | The XMM-Newton/RGS Spectra of the Millisecond X-ray Pulsar XTE J1751-305 in Outburst | Jon M. Miller (MIT), Mariano Mendez (SRON), Michiel van der Klis (Univ. Amsterdam), Rudy Wijnands (MIT), Rosario Gonzalez Riestra (SOC/ESA), Michael Nowak (MIT), Bryan Gaensler (Harvard-Smithsonian CfA), Deepto Chakrabarty (MIT), and Walter H . G. Lewin (MIT) | We have performed a preliminary analysis of the XMM-Newton Reflection Grating Spectrometer (RGS) spectra of the accreting millisecond X-ray pulsar XTE J1751-305 (Markwardt and Swank, 2002, and in't Zand et al. 2002, IAUC 7867 ; Ehle et al. 2002, IAUC 7872 ; Markwardt and Swank, 2002, IAUC 7876 , Miller et al., 2002, AT... | 2002-05-01 03:55:00 | x-ray,binary,neutron star,pulsar,star,transient | 2002-05-01 | 03:55:00 | 3,165 | [
-0.07494880259037018,
-0.04424275457859039,
-0.008547637611627579,
-0.008716930635273457,
0.02643948420882225,
-0.03323435038328171,
0.04372509941458702,
0.04854085296392441,
-0.06473156809806824,
-0.02579944021999836,
0.038352712988853455,
-0.0690503641963005,
0.03988754004240036,
-0.0408... | 90 |
92 | XTE J0929-314: a faint X-ray transient | Ron Remillard (M. I.T.) and RXTE ASM Team (M. I.T and GSFC) | XTE J0929-314: a faint X-ray transient The RXTE All-Sky Monitor has detected a faint X-ray transient at R.A. = 09h29m22s, Decl. = -31 22'.8 (equinox J2000.0; estimated 3' uncertainty at 90% confidence). The source is visible in sky maps computed from 6-day intervals of ASM data. The average flux (2-12 keV) was 15 +- 2 ... | 2002-05-01 04:16:00 | radio,optical,x-ray,black hole,neutron star,star,transient | 2002-05-01 | 04:16:00 | 727 | [
-0.032765280455350876,
-0.06240282207727432,
0.008028160780668259,
0.08601223677396774,
0.059224046766757965,
-0.06143415719270706,
0.0030765007250010967,
0.11241719871759415,
-0.04039715602993965,
-0.07273411005735397,
-0.02899850718677044,
-0.03145034611225128,
0.09895937144756317,
-0.01... | 91 |
93 | Identification of the optical counterpart of 1RXS J190141.0+012618 and a search for the optical counterpart of XTE J1901+014 | C. R.Powell, A. J. Norton, C. A. Haswell, S. D.Wolters, S. F. Green (Open University), L. Morales-Rueda, P. A. Charles (Southampton University), H. Worters (ING) | The RXTE error circle of X-ray transient XTE J1901+014, reported in IAUC # 7880 , includes the much smaller error circle of ROSAT source 1RXS J190141.0+012618, HRI position 19h01m40.1s, +1 26' 30" (J2000) uncertainty 10" (ATEL #89). We obtained Jacobus Kaptyn Telescope B, V, R, I images of the field on 2002 April 18 04... | 2002-05-10 20:43:00 | infra-red,optical,x-ray,binary,star,transient,variables,a comment | 2002-05-10 | 20:43:00 | 1,311 | [
-0.0791839137673378,
-0.01856314204633236,
0.018480390310287476,
0.002466474426910281,
0.08174322545528412,
-0.09275399893522263,
0.021803556010127068,
0.10136078298091888,
-0.012912925332784653,
-0.024561306461691856,
-0.032799944281578064,
-0.023216431960463524,
0.08861180394887924,
-0.0... | 92 |
94 | Black-Hole Candidate 1E 1740.7-2942 Enters a Faint Soft State | D. M. Smith, Space Sciences Laboratory, U. C. Berkeley; W. A. Heindl, Center for Astrophysics and Space Science, U. C. San Diego; C. B. Markwardt and J. H. Swank, NASA Goddard Space Flight Center | Frequent x-ray monitoring of the black-hole candidate 1E 1740.7-2942 near the Galactic Center with the Proportional Counter Array (PCA) on RXTE shows that it has faded and softened dramatically over the last month, entering a state similar to that shown by the only other persistently active "microquasar" in the Galacti... | 2002-05-21 01:02:00 | radio,x-ray,gamma ray,binary,black hole | 2002-05-21 | 01:02:00 | 2,148 | [
-0.06718161702156067,
-0.045851025730371475,
0.002609595423564315,
0.10118294507265091,
0.05941278487443924,
-0.010671114549040794,
0.011398235335946083,
0.1199524998664856,
0.026576820760965347,
-0.00012935583072248846,
-0.06099360063672066,
-0.010953964665532112,
0.007795396726578474,
0.... | 93 |
95 | State Changes in GX 339-4 | D. M. Smith, Space Sciences Laboratory, U. C. Berkeley; T. Belloni, Brera Observatory, Italy; W. A. Heindl and E. Kalemci, Center for Astrophysics and Space Science, U. C. San Diego; R. Remillard and M. Nowak, MIT; J. H. Swank, NASA Goddard Space Flight Center; and S. Corbel, Universite Paris VII and CEA Saclay | Using recent data from the Rossi X-ray Timing Explorer, we find that the black hole candidate GX 339-4, in outburst since March 26 (see ATEL #85), entered the Very High State (VHS) around May 6, a rare state of x-ray emission last seen in this object in 1988 (Miyamoto et al. 1991, ApJ 383, 784). The VHS may be the same... | 2002-05-21 02:20:00 | x-ray,gamma ray,binary,black hole,transient | 2002-05-21 | 02:20:00 | 1,639 | [
-0.01228233054280281,
-0.0388401634991169,
0.018988855183124542,
0.08914022892713547,
0.029411597177386284,
-0.010995788499712944,
0.006581752561032772,
0.016766030341386795,
0.043759535998106,
-0.059640608727931976,
-0.030524635687470436,
-0.03998479247093201,
0.03749174252152443,
0.01177... | 94 |
96 | HEGRA detects TeV flare from 1ES1959+650 | D. Horns, A. Konopelko (Max-Planck Institut f. Kernphysik, Heidelberg) | Initiated by IAUC # 7903 , the outburst of the nearby BL Lacertae object 1ES1959+650 (z=0.048) has been detected during May 17-21 (MJD 52411-52415) with the HEGRA system of Cherenkov telescopes on La Palma of Canary Islands. During the observation time, the overall flux above 1 TeV (2.4*10^{26} Hz) increased from (1+/-... | 2002-05-22 23:22:00 | tev,agn | 2002-05-22 | 23:22:00 | 677 | [
-0.047724246978759766,
-0.007092147599905729,
0.04393765702843666,
0.09168080240488052,
0.006109927780926228,
-0.04025898873806,
-0.04636877030134201,
0.040349047631025314,
0.030456718057394028,
-0.016610339283943176,
0.0033613366540521383,
-0.0646839588880539,
0.01251845434308052,
0.01402... | 95 |
97 | X-ray Transients in M31 | A. K.H. Kong, M. R. Garcia, F. A. Primini, J. E. McClintock and S. S. Murray (Harvard-Smithsonian Center for Astrophysics) | A bright X-ray transient was detected by Chandra on 2002 June 2 with a series of 5 HRC-I snapshots. The new source CXOU J004154.6+405648 (R.A.=00h41m54s.64, Dec.=+40d56m48s.0, +/- 1", J2000) is discovered at a luminosity (0.3-10 keV) of 1.5 x 1038 erg/s (assuming an absorbed power-law model with photon index = 2 and NH... | 2002-06-07 02:38:00 | x-ray,binary,black hole,neutron star,star,transient | 2002-06-07 | 02:38:00 | 1,361 | [
-0.058581072837114334,
-0.046736594289541245,
-0.01239964459091425,
0.0936170220375061,
0.06918290257453918,
-0.09573154151439667,
0.030111903324723244,
0.09392466396093369,
0.027691463008522987,
0.002769452054053545,
0.033335573971271515,
-0.043385304510593414,
0.049650806933641434,
-0.04... | 96 |
98 | Bright X-ray Outburst of the Black Hole Candidate 4U 1543-47 | J. M. Miller and R. A. Remillard (MIT) | On behalf of the RXTE ASM Team at M.I.T. and NASA Goddard Space Flight Center, we report the detection of a new X-ray outburst in the black hole binary, 4U 1543-47 (archival optical position: R.A. = 15h47m08.6s, Decl. = -47 40' 09", equinox J2000.0; +/- 1 "). The first detections with the RXTE ASM indicated a flux (2-1... | 2002-06-18 00:32:00 | radio,optical,x-ray,binary,black hole,transient,request for observations | 2002-06-18 | 00:32:00 | 613 | [
0.02323707565665245,
-0.00044949285802431405,
0.012564334087073803,
0.04237319156527519,
0.06497141718864441,
-0.06049882620573044,
-0.002915305783972144,
0.04282247647643089,
-0.0027444392908364534,
-0.040850259363651276,
-0.0509609617292881,
-0.08833079785108566,
0.07993747293949127,
0.0... | 97 |
99 | SGR-like X-ray Bursts from the Anomalous X-ray Pulsar 1E 2259+586 | V. M. Kaspi (McGill/MIT), F. P. Gavriil (McGill), P. M. Woods (USRA/NSSTC) | V. M. Kaspi (McGill/MIT), F. P. Gavriil (McGill) and P. M. Woods (USRA/NSSTC), following the discovery of brief X-ray bursts from the direction of the anomalous X-ray pulsar 1E 2259+586 (IAUC 7924 ) on June 18, 2002, report now on further analysis of the same RXTE/PCA data. We find that the pulsed flux declined monoton... | 2002-06-22 07:20:00 | x-ray,gamma ray,magnetar,neutron star,pulsar,soft gamma-ray repeater,star,supernova remnant,supernovae | 2002-06-22 | 07:20:00 | 1,266 | [
-0.03960493206977844,
-0.07586243003606796,
0.0252506323158741,
0.04548468440771103,
0.0605093389749527,
-0.038229022175073624,
0.000705020793247968,
0.05151975527405739,
0.02220829203724861,
-0.006091711577028036,
-0.016409579664468765,
0.0127900131046772,
0.04162418097257614,
0.031163768... | 98 |
100 | Gemini IR Detection of 1E 2259+586 Post-Burst | V. M. Kaspi (McGill/MIT), J. Jensen(Gemini), F. Rigaut (Gemini), A. Hatakeyama (Gemini), P. M. Woods (USRA/NSSTC) | V. M. Kaspi (McGill University/Massachusetts Institute of Technology), J. Jensen (Gemini), F. Rigaut (Gemini), A. Hatakeyama (Gemini), P. M. Woods (USRA/NSSTC) report Gemini North 8-m near-IR observations of the anomalous X-ray pulsar 1E 2259+586 field. K_s band data were obtained on June 21, 2002 at 14:44 UT using the... | 2002-06-23 08:41:00 | infra-red,optical,x-ray,gamma ray,neutron star,pulsar,soft gamma-ray repeater,star,supernova remnant,supernovae | 2002-06-23 | 08:41:00 | 1,081 | [
-0.06814822554588318,
-0.00953606702387333,
-0.03655135631561279,
0.04089387506246567,
0.0022364368196576834,
-0.05249423161149025,
0.022747589275240898,
0.03619090095162392,
0.014430820010602474,
0.03733111545443535,
-0.007356809452176094,
0.003236588556319475,
0.048772182315588,
-0.03706... | 99 |
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