231 citations · 877 across the 23 of their papers we have counts for
3 papers · 1 filter
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…
New Evidence for Proton Cyclotron Resonance in a Magnetar Strength Field from SGR 1806-20
Alaa I. Ibrahim, Jean H. Swank, William Parke
A great deal of evidence has recently been gathered in favor of the picture that Soft Gamma Repeaters and Anomalous X-Ray Pulsars are powered by ultra-strong magnetic fields (B > 1…
Discovery of Cyclotron Resonance Features in the Soft Gamma Repeater SGR 1806-20
Alaa I. Ibrahim, Samar Safi-Harb, Jean H. Swank +3
We report evidence of cyclotron resonance features from the Soft Gamma Repeater SGR 1806-20 in outburst, detected with the Rossi X-ray Timing Explorer in the spectrum of a long, co…