INTEGRAL Observations of the Vela Region Focusing on Vela X-1

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dc.creatorSchanne, Stephane
dc.creatorGotz, Diego
dc.creatorGerard, Lucie
dc.creatorSizun, Patrick
dc.creatorFalanga, Maurizio
dc.creatorHamadache, Clarisse
dc.creatorCordier, Bertand
dc.creatorvon Kienlin, Andreas
dc.date2007-01-23
dc.date.accessioned2026-07-07T07:42:31Z
dc.date.available2026-07-07T07:42:31Z
dc.descriptionThe Vela region has been observed for 1.7 Ms in November 2005 by the INTEGRAL satellite. We present preliminary spectral and temporal results of Vela X-1, an eclipsing neutron star hosted in a wind-accreting high-mass X-ray binary system. Using data from ISGRI, SPI and JEM-X, we firmly confirm the existence of cyclotron resonant scattering features (CRSF) at ~27 keV and ~54 keV, implying a neutron-star magnetic field of ~3 10^12 Gauss, and the presence of an iron emission line at ~6.5 keV. During two strong flares those parameters remained unchanged. Furthermore we measure the neutron-star spin period of 283.6 s, indicating a still constant trend.
dc.description4 pages, 11 figures. Accepted for publication in ESA SP-622 (Proceedings of the 6th INTEGRAL Workshop, Moscow, 2006 07 03-07)
dc.identifierhttps://arxiv.org/abs/astro-ph/0701641
dc.identifierhttp://arxiv.org/abs/astro-ph/0701641
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122471
dc.subjectAstrophysics
dc.titleINTEGRAL Observations of the Vela Region Focusing on Vela X-1
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