18.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, BerkeleyUS1.3k papers
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- National Institute for AstrophysicsIT239 papers
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32 papers · 1 filter
Present and future gamma-ray burst experiments
K. Hurley
Gamma-ray burst counterpart studies require small, prompt error boxes. Today, there are several missions which can provide them: BeppoSAX, the Rossi X-Ray Timing Explorer, and the…
An IR Search for Extinguished Supernovae in Starburst Galaxies
Bruce Grossan, Earl Spillar, Robert Tripp +3
IR and Radio band observations of heavily extinguished regions in starburst galaxies suggest a very high SN rate associated with such regions. Optically measured supernova (SN) rat…
Astrophysics with HESSI
D. M. Smith, R. P. Lin, J. McTiernan +1
In the summer of the year 2000, a NASA Small Explorer satellite, the High Energy Solar Spectroscopic Imager (HESSI), will be launched. It will consist of nine large, coaxial german…
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
S. Perlmutter, G. Aldering, G. Goldhaber +29
We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discover…
The Ulysses Supplement to the BATSE 4Br Catalog of Cosmic Gamma-Ray Bursts
K. Hurley, M. S. Briggs, R. M. Kippen +5
We present Interplanetary Network localization information for 147 gamma-ray bursts observed by the Burst and Transient Source Experiment between the end of the 3rd BATSE catalog a…
The Ulysses Supplement to the BATSE 3B Catalog of Cosmic Gamma-Ray Bursts
K. Hurley, M. S. Briggs, R. M. Kippen +5
We present Interplanetary Network localization information for 218 gamma-ray bursts in the 3rd BATSE catalog, obtained by analyzing the arrival times of these bursts at the Ulysses…
No Evidence for Gamma-Ray Burst/Abell Cluster or Gamma- Ray Burst/Radio-Quiet Quasar Correlations
K. Hurley, D. H. Hartmann, C. Kouveliotou +4
We examine the recent claims that cosmic gamma-ray bursts are associated with either radio-quiet quasars or Abell clusters. These associations were based on positional coincidences…
A giant, periodic flare from the soft gamma repeater SGR1900+14
K. Hurley, T. Cline, E. Mazets +11
Soft gamma repeaters are high-energy transient sources associated with neutron stars in young supernova remnants. They emit sporadic, short (~ 0.1 s) bursts with soft energy spectr…
Reactivation and Precise IPN Localization of the Soft Gamma Repeater SGR1900+14
K. Hurley, C. Kouveliotou, P. Woods +5
In 1998 May, the soft gamma repeater SGR1900+14 emerged from several years of quiescence and emitted a series of intense bursts, one with a time history unlike any previously obser…
ASCA Discovery of an X-ray Pulsar in the Error Box of SGR1900+14
K. Hurley, P. Li, C. Kouveliotou +9
We present a 2 - 10 keV ASCA observation of the field around the soft gamma repeater SGR1900+14. One quiescent X-ray source was detected in this observation, and it was in the SGR…
Probing the Small-Scale Angular Distribution of Gamma-Ray Bursts with Combined BATSE/Ulysses 4B Locations
R. M. Kippen, K. Hurley, G. N. Pendleton
We investigate the angular distribution of gamma-ray bursts using the largest catalog of well-localized events that is currently available---combined BATSE/Ulysses burst locations.…
Gravitationally Lensed Gamma-Ray Bursts as Probes of Dark Compact Objects
G. F. Marani, R. J. Nemiroff, J. P. Norris +2
If dark matter in the form of compact objects comprises a large fraction of the mass of the universe, then gravitational lensing effects on gamma-ray bursts are expected. We utiliz…
The last gasps of VY CMa: Aperture synthesis and adaptive optics imagery
J. D. Monnier, P. G. Tuthill, B. Lopez +3
We present new observations of the red supergiant VY CMa at 1.25 micron, 1.65 micron, 2.26 micron, 3.08 micron and 4.8 micron. Two complementary observational techniques were utili…
Discovery of a magnetar associated with the Soft Gamma Repeater SGR 1900+14
Chryssa Kouveliotou, Tod Strohmayer, Kevin Hurley +6
The soft-gamma repeater SGR 1900+14 became active again on June 1998 after a long period of quiescence; it remained at a low state of activity until August 1998, when it emitted a…
On the Association of Gamma-Ray Bursts with Supernovae
R. M. Kippen, M. S. Briggs, J. M. Kommers +7
The recent discovery of a supernova (SN 1998bw) seemingly associated with GRB~980425 adds a new twist to the decades-old debate over the origin of gamma-ray bursts. To investigate…
Discovery of the peculiar supernova 1998bw in the error box of GRB980425
T. J. Galama, P. M. Vreeswijk, J. van Paradijs +42
The discovery of X-ray, optical and radio afterglows of gamma-ray bursts (GRBs) and the measurements of the distances to some of them have established that these events come from G…
The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background: I. Limits and Detections
M. G. Hauser, R. G. Arendt, T. Kelsall +15
The DIRBE on the COBE spacecraft was designed primarily to conduct systematic search for an isotropic CIB in ten photometric bands from 1.25 to 240 microns. The results of that sea…
Search for Strange Matter by Heavy Ion Activation
M. C. Perillo Isaac, Y. D. Chan, R. Clark +12
We present the results of an experimental search for stable strange matter using the heavy ion activation technique. We studied samples of a meteorite, terrestrial nickel ore, and…
The Rapid Decay of the Optical Emission from GRB 980326 and its Possible Implications
Paul J. Groot, Titus J. Galama, Paul M. Vreeswijk
We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 +/- 0.13 and a constant underlying…
HgMn Stars as apparent X-ray emitters
S. Hubrig, W. Berghoefer, G. Mathys
In the ROSAT all-sky survey 11 HgMn stars were detected as soft X-ray emitters (Berghoefer, Schmitt & Cassinelli 1996). Prior to ROSAT, X-ray observations with the Einstein Observa…
XTE J1739-302: An Unusual New X-ray Transient
D. M. Smith, D. Main, F. Marshall +5
A new x-ray transient, designated XTE J1739-302, was discovered with the Proportional Counter Array (PCA) on the Rossi X-ray Timing Explorer (RXTE) in data from 12 August 1997. Alt…
The X-ray Spectrum of SAX J1808.4-3658
W. A. Heindl, D. M. Smith
We report on the X-ray spectrum of the 401 Hz X-ray pulsar and type I burst source SAX J1808.4-3658, during its 1998 April/May hard outburst. The observations were made with RXTE o…
The Thermal Pressure of the Hot Interstellar Medium derived from Cloud Shadows in the Extreme Ultraviolet
Thomas W. Berghoefer, Stuart Bowyer, Richard Lieu +1
We have used the Deep Survey telescope of EUVE to investigate shadows in the diffuse EUV/Soft X-Ray background cast by clouds in the interstellar medium. We confirm the existence o…
Inverse Compton Scattering as the Source of Diffuse EUV Emission in the Coma Cluster of Galaxies
Stuart Bowyer, Thomas W. Berghoefer
We have examined the hypothesis that the majority of the diffuse EUV flux in the Coma cluster is due to inverse Compton scattering of low energy cosmic ray electrons (0.16 < epsilo…