INTEGRAL and XMM-Newton observations of LSI +61 303
Jun, 2006
8 pages
Published in:
- Mon.Not.Roy.Astron.Soc. 372 (2006) 1585-1592
e-Print:
- astro-ph/0606070 [astro-ph]
View in:
Citations per year
Abstract: (arXiv)
LSI +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.Note:
- 8 pages, accepted to MNRAS
- pulsars: individual: LSI +61o 303
- X-rays: binaries
- X-rays: individual: LSI + 61o 303
References(33)
Figures(0)