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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…
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…
Multi-wavelength observations of the Soft Gamma Repeater SGR 1900+14 during its April 2001 activation
C. Kouveliotou, A. Tennant, P. M. Woods +6
The soft-gamma repeater SGR 1900+14 became active on 18 April 2001 after about two years of quiescence; it had remained at a very low state of activity since the fall of 1998, when…
Temporal and Spectral Characteristics of Short Bursts from the Soft Gamma Repeaters 1806-20 and 1900+14
Ersin Gogus, Chryssa Kouveliotou, Peter M. Woods +3
We study the temporal and coarse spectral properties of 268 bursts from SGR 1806-20 and 679 bursts from SGR 1900+14, all observed with the Rossi X-Ray Timing Explorer/Proportional…
Evidence for a Sudden Magnetic Field Reconfiguration in SGR 1900+14
Peter M. Woods, Chryssa Kouveliotou, Ersin Gogus +5
We report the detection of large flux changes in the persistent X-ray flux of SGR 1900+14 during its burst active episode in 1998. Most notably, we find a factor ~700 increase in t…