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- Goddard Space Flight CenterUS454 papers
- Universities Space Research AssociationUS381 papers
- University of Alabama in HuntsvilleUS357 papers
- Massachusetts Institute of TechnologyUS295 papers
- California Institute of TechnologyUS290 papers
- University of AmsterdamNL275 papers
- Centre National de la Recherche ScientifiqueFR265 papers
- University of Maryland, College ParkUS259 papers
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24 papers · 2 filters
On the Nature of the Bright Short-Period X-ray Source in the Circinus Galaxy Field
Martin C. Weisskopf, Kinwah Wu, Allyn F. Tennant +2
The spectrum and light curve of the bright X-ray source CG X-1 in the field of the Circinus galaxy are re-examined. Previous analyses have concluded that the source is an accreting…
Gamma-Ray Bursts are Produced Predominately in the Early Universe
J. R. Lin, S. N. Zhang, T. P. Li
It is known that some observed gamma-ray bursts (GRBs) are produced at cosmological distances and that the GRB production rate may follow the star formation rate. We model the BATS…
Discovery of a New Transient Magnetar Candidate: XTE J1810-197
A. I. Ibrahim, C. Markwardt, J. Swank +10
We report the discovery of a new X-ray pulsar, XTE J1810-197. The source was serendipitously discovered on 2003 July 15 by the Rossi X-ray Timing Explorer (RXTE) while observing th…
Chandra Phase-Resolved Spectroscopy of the Crab Pulsar
Martin C. Weisskopf, Stephen L. O'Dell, Frits Paerels +3
We present the first phase-resolved study of the X-ray spectral properties of the Crab Pulsar that covers all pulse phases. The superb angular resolution of the Chandra X-ray Obser…
GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB
A. J. Castro-Tirado, J. Gorosabel, S. Guziy +39
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ~1.7 days after the event. Here we report the discovery of a di…
MS 1603.6+2600: an Accretion Disc Corona source?
P. G. Jonker, M. van der Klis, C. Kouveliotou +3
We have observed the eclipsing low-mass X-ray binary MS1603.6+2600 with Chandra for 7 ksec. The X-ray spectrum is well fit with a single absorbed powerlaw with an index of ~2. We f…