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The BeppoSAX View on the 2001 Reactivation of SGR 1900+14
M. Feroci, S. Mereghetti, E. Costa +13
After a couple of years of quiescence, the soft gamma repeater SGR 1900+14 suddenly reactivated on 18 April 2001, with the emission of a very intense, long and modulated flare, onl…
Chandra Observations of the Anomalous X-ray Pulsar 1E 2259+58.6
S. K. Patel, C. Kouveliotou, P. M. Woods +6
We present X-ray imaging, timing, and phase resolved spectroscopy of the anomalous X-ray pulsar 1E 2259+58.6 using the Chandra X-ray Observatory. The spectrum is well described by…
Serendipitous Detections of XTE J1906+09 with the Rossi X-ray Timing Explorer
Colleen A. Wilson, Mark H. Finger, Ersin Gogus +2
In 1996 during Rossi X-ray Timing Explorer (RXTE) observations of SGR 1900+14, the 89-s X-ray pulsar XTE J1906+09 was discovered. As a result of monitoring campaigns of SGR 1900+14…
The Burst and Transient Source Experiment Earth Occultation Technique
B. A. Harmon, G. J. Fishman, C. A. Wilson +7
An Earth orbiting detector sensitive to gamma ray photons will see step-like occultation features in its counting rate when a gamma ray point source crosses the Earth's limb. This…
Large Torque Variations in Two Soft Gamma Repeaters
Peter M. Woods, Chryssa Kouveliotou, Ersin Gougus +5
We have monitored the pulse frequencies of the two soft gamma repeaters SGR 1806-20 and SGR 1900+14 through the beginning of year 2001 using primarily Rossi X-ray Timing Explorer P…
Discovery of Pulsed X-rays from the SMC Transient RX J0052.1-7319
M. H. Finger, D. J. Macomb, R. C. Lamb +3
Coherent 65 mHz pulsations in the X-ray flux of the Small Magellantic Cloud (SMC) transient source RX J0052.1-7319 have been detected by us in an analysis of ROSAT data. We report…