14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Goddard Space Flight CenterUS361 papers
- Marshall Space Flight CenterUS357 papers
- Centre National de la Recherche ScientifiqueFR280 papers
- Max Planck Institute for Extraterrestrial PhysicsDE240 papers
- University of Maryland, College ParkUS239 papers
- Universities Space Research AssociationUS214 papers
- Stanford UniversityUS212 papers
- National Institute for AstrophysicsIT196 papers
- University of Rome Tor VergataIT184 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR179 papers
- University of PaduaIT178 papers
- Istituto Nazionale di Fisica Nucleare, Roma Tor VergataIT175 papers
47 papers · 1 filter
The decay of optical emission from the Gamma-Ray Burst GRB 970228
Titus J. Galama, Paul J. Groot, Jan van Paradijs +6
We present the R_c band light curve of the optical transient (OT) associated with GRB970228, based on re-evaluation of existing photometry. Data obtained until April 1997 suggested…
Extreme Energy Cosmic Rays (EECR) Observation Capabilities of an "Airwatch from Space'' Mission
C. N. De Marzo
The longitudinal development and other characteristics of the EECR induced atmospheric showers can be studied from space by detecting the fluorescence light induced in the atmosphe…
The viscous disk of GRS 1915+105
T. Belloni, M. Mendez, A. R. King +2
GRS 1915+105, one of the two known galactic microquasars, shows an extremely complex variability in the X-ray band, comparable to no other X-ray source in the sky. Making use of RX…
A varying kHz peak separation in 4U 1608-52
M. Mendez, M. van der Klis, J. van Paradijs +6
Using a new technique to improve the sensitivity to weak Quasi-Periodic Oscillations (QPO) we discovered a new QPO peak at about 1100 Hz in the March 1996 outburst observations of…
The Gamma Ray Bursts GRB970228 and GRB970508: What Have We Learnt?
Mario Livio, Kailash C. Sahu, Larry Petro +7
We examine what we regard as key observational results on GRB 970228 and GRB 970508 and show that the accumulated evidence strongly suggests that gamma-ray bursts (GRBs) are cosmol…
BATSE Evidence for GRB Spectral Features
M. S. Briggs, D. L. Band, R. D. Preece +3
We have developed an automatic search procedure to identify low-energy spectral features in GRBs. We have searched 133,000 spectra from 117 bright bursts and have identified 12 can…
GRB Repetition Limits from Current BATSE Observations
Jon Hakkila, Charles A. Meegan, Geoffrey N. Pendleton +4
Revised upper limits on gamma-ray burst repetition rates are found using the BATSE 3B and 4B catalogs. A statistical repetition model is assumed in which sources burst at a mean ra…
BATSE Sky Exposure
Jon Hakkila, Charles A. Meegan, Geoffrey N. Pendleton +4
Angular sky exposure is presented for a number of published BATSE gamma-ray burst catalogs. A new algorithm was required due to telemetry gaps resulting from onboard tape recorder…
Discovery of a second kHz QPO peak in 4U 1608-52
M. Mendez, M. van der Klis, J. van Paradijs +6
Using a new technique to improve the sensitivity to weak Quasi-Periodic Oscillations (QPO) we discovered a new QPO peak at about 1100 Hz in the March 1996 outburst observations of…
BATSE GRB Location Errors
M. S. Briggs, G. N. Pendleton, J. J. Brainerd +4
We characterize the error distribution of BATSE GRB locations by modeling the distribution of separations between BATSE locations and IPN annuli. We determine error model parameter…
AI Gamma-Ray Burst Classification: Methodology/Preliminary Results
Jon Hakkila, David J. Haglin, Richard J. Roiger +3
Artificial intelligence (AI) classifiers can be used to classify unknowns, refine existing classification parameters, and identify/screen out ineffectual parameters. We present an…
Five Years in the Life of Cygnus X-1: BATSE Long-Term Monitoring
W. Paciesas, C. R. Robinson, M. L. McCollough +3
The hard X-ray emission from Cygnus X-1 has been monitored continually by BATSE since the launch of CGRO in April 1991. We present the hard X-ray intensity and spectral history of…
Extreme Ultraviolet Emission from Clusters of Galaxies: Inverse Compton Radiation from a Relic Population of Cosmic Ray Electrons?
Craig L. Sarazin, Richard Lieu
We suggest that the luminous extreme ultraviolet (EUV) emission which has been detected recently from clusters of galaxies is Inverse Compton (IC) scattering of Cosmic Microwave Ba…
Absorption dips in GRO J1655-40: mapping the inner accretion disk
Erik Kuulkers, Rudy Wijnands, Tomaso Belloni +3
Using the RXTE PCA we discovered dips in the X-ray light curves of the black-hole candidate GRO J1655-40 during outburst. They are short (~minute) and deep (down to ~8% of the out-…
The Statistics of the BATSE Spectral Features
D. Band, J. Matteson, M. Briggs +3
The absence of a BATSE line detection in a gamma-ray burst spectrum during the mission's first six years has led to a statistical analysis of the occurrence of lines in the BATSE b…
Hard X-ray Lags in Cygnus X-1
D. J. Crary, M. H. Finger, C. Kouveliotou +4
We have used the Fourier cross spectra of Cyg X-1, as obtained with BATSE during a period of almost 2000 days, to estimate the phase (or time) lags between X-ray flux variations in…
Discovery of KiloHertz Quasi-Periodic Oscillations in the Z source Cygnus X-2
Rudy Wijnands, Jeroen Homan, Michiel van der Klis +6
During observations with RXTE we discovered two simultaneous kHz QPOs near 500 Hz and 860 Hz in the Z source Cyg X-2. In the X-ray color-color diagram and hardness-intensity diagra…
A Search for Optical Afterglow from GRB970828
Paul J. Groot, T. Galama, J. van Paradijs +1
We report on the results of R band observations of the error box of the gamma-ray burst of August 28, 1997, made between 4 hours and 8 days after this burst occurred. No counterpar…
BATSE Observations of Gamma-Ray Burst Spectra. IV. Time-Resolved High-Energy Spectroscopy
R. D. Preece, G. N. Pendleton, M. S. Briggs +5
We report on the temporal behavior of the high-energy power law continuum component of gamma-ray burst spectra with data obtained by the Burst and Transient Source Experiment. We h…
HEXTE Observations of SGR 1806-20 During Outburst
D. Marsden, R. E. Rothschild, C. Kouveliotou +2
We discuss observations of the soft gamma repeater SGR 1806-20 during the RXTE Target of Opportunity observations made in November 1996. During the ~50 ksec RXTE observation, HEXTE…
Testing the Invariance of Cooling Rate in Gamma-Ray Burst Pulses
A. Crider, E. P. Liang, R. D. Preece
Recent studies have found that the spectral evolution of pulses within gamma-ray bursts (GRBs) is consistent with simple radiative cooling. Perhaps more interesting was a report th…
Confronting Synchrotron Shock and Inverse Comptonization Models with GRB Spectral Evolution
A. Crider, E. P. Liang, R. D. Preece
The time-resolved spectra of gamma-ray bursts (GRBs) remain in conflict with many proposed models for these events. After proving that most of the bursts in our sample show evidenc…
A Sequence of Declining Outbursts from GX339-4
B. C. Rubin, B. A. Haron, W. S. Paciesas +3
The flux and spectrum of the black hole candidate GX339-4 has been monitored by the Burst and Transient Source Experiment (BATSE) on the Compton Gamma-ray Observatory (CGRO) since…
Kilo-hertz QPO and X-ray Bursts in 4U 1608-52 in Low Intensity State
W. Yu, S. N. Zhang, B . A. Harmon +8
We present the results from RXTE/PCA observations of 4U 1608-52 in its island state on March 15, 18 and 22 of 1996. Three type I X-ray bursts were detected in one RXTE orbit on Mar…