Volume 433, Number 3, April III 2005
|Page(s)||L45 - L48|
|Published online||29 March 2005|
Letter to the Editor
INTEGRAL observation of V 0332+53 in outburst
Institut für Astronomie und Astrophysik – Astronomie, Sand 1, 72076 Tübingen, Germany
2 INTEGRAL Science Data Centre, 16 Ch. d'Écogia, 1290 Versoix, Switzerland e-mail: Ingo.Kreykenbohm@obs.unige.ch
3 Observatoire de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland
4 N. Copernicus Astronomical Center, Bartycka 18, Warsaw 00-716, Poland
5 Space Sciences Laboratory, University of California, Berkeley, Berkeley, CA, 94702-7450, USA
Accepted: 9 February 2005
We present the analysis of a 100 ks INTEGRAL (3-100 ) observation of the transient X-ray pulsar V 0332in outburst. The source is pulsating at s with a clear double pulse from 6 to 60 . The average flux was ~550 mCrab between 20 and 60 . We modeled the broad band continuum from 5 to 100 with a power-law modified by an exponential cut off. We observe three cyclotron lines: the fundamental line at 24.9 , the first harmonic at 50.5 as well as the second harmonic at 71.7 , thus confirming the discovery of the harmonic lines by Coburn et al. (2005) in RXTEdata.
Key words: X-rays: stars / stars: flare / stars: pulsars: individual: V0332+53 / stars: magnetic fields
© ESO, 2005
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