Discovery of hard non-thermal pulsed X-ray emission from the anomalous X-ray pulsar 1E 1841-045

Details Discovery of hard non-thermal pulsed X-ray emission from the anomalous X-ray pulsar 1E 1841-045 Discovery of hard non-thermal pulsed X-ray emission from the anomalous X-ray pulsar 1E 1841-045

2004-04-29

arxiv.org/abs/astro-ph/0404582v1

Astrophys.J. 613 (2004) 1173-1178

Astronomy and Astrophysics

Astrophysics

14 pages in ApJ preprint style, 5 figures one in color, Submitted to ApJ

Scientific paper

10.1086/423129

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.

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