INTEGRAL observations of V0332+53 in outburst

Details INTEGRAL observations of V0332+53 in outburst INTEGRAL observations of V0332+53 in outburst

2005-03-01

arxiv.org/abs/astro-ph/0503028v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. Accepted for publication in A&A Letters

Scientific paper

10.1051/0004-6361:200500023

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.

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