Discovery of Hard Nonthermal Pulsed X‐Ray Emission from the Anomalous X‐Ray Pulsar 1E 1841−045
- 1 October 2004
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 613 (2) , 1173-1178
- https://doi.org/10.1086/423129
Abstract
We report the discovery of non-thermal pulsed X-ray/soft gamma-ray emission up to about 150 keV from the anomalous X-ray pulsar AXP 1E 1841-045 located near the centre of supernova remnant Kes 73 using RXTE PCA and HEXTE data. The morphology of the double-peaked pulse profile changes rapidly with energy from 2 keV up to about 8 keV, above which the pulse shape remains more or less stable. The pulsed spectrum is very hard, its shape above 10 keV can be described well by a power law with a photon index of 0.94 +/- 0.16. 1E 1841-045 is the first AXP for which such very-hard pulsed emission has been detected, which points to an origin in the magnetosphere of a magnetar.Comment: 14 pages in ApJ preprint style, 5 figures one in color, Submitted to ApKeywords
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