BeppoSAX observation of the transient X-ray pulsar GS 1843+00
S. Piraino, A. Santangelo, A. Segreto, S. Giarrusso, G. Cusumano, S. Del Sordo, N. R. Robba, D. Dal Fiume, M. Orlandini, T. Oosterbroek, A. N. Parmar
Abstract
We present the results from both the timing and spectroscopic analysis of the transient X-ray pulsar GS 1843+00 observed by the BeppoSAX satellite on 1997 April 4, when the source was at a luminosity of ~1037 erg s-1. GS 1843+00 shows a very hard spectrum that is well fitted by an absorbed power law (NH \~2.3 1022 cm-2) modified by a high energy cut-off above 6 keV. The source shows a small pulse amplitude in the whole energy band. The pulse profile evolves with energy from a double-peaked to single-peaked shape. The barycentric pulse period is 29.477+/-0.001 s.
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