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On the nature of the ultraluminous X-ray transient in Cen~A (NGC 5128)
Kajal K. Ghosh, Mark H. Finger, Douglas A. Swartz +2
We combine 9 ROSAT, 9 Chandra, and 2 XMM-Newton observations of the Cen~A galaxy to obtain the X-ray light curve of 1RXH J132519.8-430312 (=CXOU J132519.9430317) spanning 1990 t…
X-ray Bursts from the Transient Magnetar Candidate XTE J1810-197
P. M. Woods, C. Kouveliotou, F. P. Gavriil +6
We have discovered four X-ray bursts, recorded with the Rossi X-ray Timing Explorer Proportional Counter Array between 2003 September and 2004 April, that we show to originate from…
Gamma-Ray Observations of a Giant Flare from The Magnetar SGR 1806-20
D. M. Palmer, S. Barthelmy, N. Gehrels +25
Magnetars comprise two classes of rotating neutron stars (Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars), whose X-ray emission is powered by an ultrastrong magnetic field…