INTEGRAL and XMM-Newton observations of LSI +61 303

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dc.creatorChernyakova, M.
dc.creatorNeronov, A.
dc.creatorWalter, R.
dc.date2006-06-05
dc.date2006-08-16
dc.date.accessioned2026-07-07T10:23:10Z
dc.date.available2026-07-07T10:23:10Z
dc.descriptionLSI +61 303 is one of the few X-ray binaries with Be star companion from which both radio and high-energy gamma-ray emission have been observed. We present XMM-Newton and INTEGRAL observations which reveal variability of the X-ray spectral index of the system. The X-ray spectrum is hard (photon index ~ 1.5) during the orbital phases of both high and low X-ray flux. However, the spectrum softens at the moment of transition from high to low X-ray state. The spectrum of the system in the hard X-ray band does not reveal the presence of a cut-off (or, at least a spectral break) at 10-60 keV energies, expected if the compact object is an accreting neutron star. The observed spectrum and spectral variability can be explained if the compact object in the system is a rotation powered pulsar.
dc.description8 pages, accepted to MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0606070
dc.identifierhttp://arxiv.org/abs/astro-ph/0606070
dc.identifierMon.Not.Roy.Astron.Soc.372:1585-1592,2006
dc.identifierdoi:10.1111/j.1365-2966.2006.10946.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175729
dc.subjectAstrophysics
dc.titleINTEGRAL and XMM-Newton observations of LSI +61 303
dc.typetext

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