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 sequence | 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,
-0.013923058286309242,
-0.07610341906547546,
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-0.0765090212225914,
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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 | [
-0.023058470338582993,
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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,
-0.039303816854953766,
0.032570596784353256,
-0.00958364736288786,
-0.05550466850399971,
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0.032255835831165314,
-... | 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,
-0.07970959693193436,
-0.006727009080350399,
0.020782167091965675,
0.016752444207668304,
0.022773610427975655,
0.029642662033438683,
0.03777003660798073,
-0.01938668079674244,
-0.0814623013138771,
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 | [
-0.058535557240247726,
-0.026300497353076935,
0.005738308187574148,
-0.03389855846762657,
0.02961626648902893,
-0.04237203672528267,
-0.003532150760293007,
0.01282894890755415,
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-0.05102705582976341,
-0.013209225609898567,
-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 | [
-0.05157780647277832,
-0.0019521545618772507,
-0.038732338696718216,
0.02433936484158039,
0.08379367738962173,
-0.056056857109069824,
0.03925362229347229,
0.0689956322312355,
-0.09301874786615372,
-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 | [
-0.07520414888858795,
-0.01794513687491417,
-0.022344179451465607,
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-0.02227669022977352,
-0.02656896971166134,
0.004991576541215181,
-0.06690887361764908,
-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 | [
0.012251748703420162,
-0.05117415636777878,
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-0.03867235779762268,
-0.009594234637916088,
-0.015689648687839508,
0.11980750411748886,
-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 | [
-0.07655233144760132,
-0.053679391741752625,
-0.0870586484670639,
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-0.01296625379472971,
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 | [
-0.12111613154411316,
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-0.05438905209302902,
-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 | [
-0.08334829658269882,
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-0.05735117942094803,
0.018737541511654854,
-0.01613786444067955,
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,
-0.029621653258800507,
0.0005136845866218209,
0.02728750929236412,
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-0.004869610536843538,
0.03943021595478058,
-... | 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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0.00... | 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 | [
-0.09355867654085159,
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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,
-0.005387614481151104,
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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 | [
-0.028585033491253853,
0.02587912604212761,
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-0.006188511848449707,
-0.021627167239785194,
0.04292331635951996,
-0.00889347679913044,
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 | [
-0.059729207307100296,
-0.14454150199890137,
0.0493907704949379,
-0.004170069471001625,
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-0.02776051126420498,
0.032234176993370056,
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0.014224588871002197,
0.04329000413417816,
0.030535874888300896,
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,
-0.06970474123954773,
-0.004914287943392992,
0.031157679855823517,
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-0.019836310297250748,
0.03496617451310158,
-0.0042181177996098995,
0.03044644556939602,
-0.... | 19 |
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