INTEGRAL observation of V 0332+53 in outburst

Free access article

Issue		A&A Volume 433, Number 3, April III 2005


Page(s)		L45 - L48
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:200500023

A&A 433, L45-L48 (2005)
DOI: 10.1051/0004-6361:200500023

Letter

INTEGRAL observation of V 0332+53 in outburst

I. Kreykenbohm^{1, 2}, N. Mowlavi^{2, 3}, N. Produit^{2, 3}, S. Soldi^{2, 3}, R. Walter^{2, 3}, P. Dubath^{2, 3}, P. Lubinski^{4, 2}, M. Türler^{2, 3}, W. Coburn⁵, A. Santangelo¹, R. E. Rothschild⁵ and R. Staubert¹

¹ 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

(Received 18 January 2005 / Accepted 9 February 2005)

Abstract
We present the analysis of a 100 ks INTEGRAL (3-100 ${\rm keV}$ ) observation of the transient X-ray pulsar V 0332+53in outburst. The source is pulsating at $P_{\rm Pulse}=4.3751\pm0.0002$ s with a clear double pulse from 6 ${\rm keV}$ to 60 ${\rm keV}$ . The average flux was ~550 mCrab between 20 ${\rm keV}$ and 60 ${\rm keV}$ . We modeled the broad band continuum from 5 ${\rm keV}$ to 100 ${\rm keV}$ with a power-law modified by an exponential cut off. We observe three cyclotron lines: the fundamental line at 24.9 ^+0.1_-0.1 ${\rm keV}$ , the first harmonic at 50.5 ^+0.1_-0.1 ${\rm keV}$ as well as the second harmonic at 71.7 ^+0.7_-0.8 ${\rm keV}$ , 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

SIMBAD Objects

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.