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25 April 2024

» arxiv » astro-ph/0503028

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INTEGRAL observations of V0332+53 in outburst
I. Kreykenbohm ; N. Mowlavi ; N. Produit ; S. Soldi ; R. Walter ; P. Dubath ; P. Lubinski ; M. Tuerler ; W. Coburn ; A. Santangelo ; R. E. Rothschild ; R. Staubert ;
Date:	1 Mar 2005
Subject:	astro-ph
Abstract:	We present the analysis of a 100ksec Integral(3-100kev) observation of the transient X-ray pulsar V0332+53 inoutburst. The source is pulsating at P=4.3751+/-0.0002s with a clear double pulse from 6 kev to 60 kev. The average flux was ~550mCrab between 20 kev and 60 kev. We modeled the broad band continuum from 5 kev to 100 kev with a power-law modified by an exponential cut off. We observe three cyclotron lines: the fundamental line at 24.9+/-0.1 kev, the first harmonic at 50.5+/-0.1 kev as well as the second harmonic at71.7+/-0.8 kev, thus confirming the discovery of the harmonic lines by Coburn et al. (2005) in RXTE data.
Source:	arXiv, astro-ph/0503028
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