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ROSAT/Chandra Observations of a Bright Transient in M81
Kajal Ghosh, Douglas Swartz, Allyn Tennant +1
We present a 10-year X-ray light curve and the spectra of a peculiar X-ray transient in the spiral galaxy M81. The source was below the detection limit of ROSAT PSPC before 1993, b…
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…
A possible faint near-infrared counterpart to the AXP 1E~2259+58.6
F. Hulleman, A. F. Tennant, M. H. van Kerkwijk +3
We present near-infrared and optical observations of the field of the Anomalous X-ray Pulsar 1E 2259+58.6 taken with the Keck telescope. We derive a subarcsecond Chandra position a…
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…