Population studies of INTEGRAL sources (original) (raw)
INTEGRAL-ISGRI has detected over 300 sources in its first 3 years of observations. We have collected the parameters of these sources from the literature (N H , spin and orbital periods, and distances or redshifts) in order to test correlations expected from theoretical predictions, and to investigate where the new and previously-known sources detected by ISGRI fit in the parameter space of high-energy objects. The influence of the local absorbing matter on the modulations is studied for High-Mass Xray Binaries with OB supergiant and Be companions. In this context, we find that High-Mass X-ray Binaries are generally segregated in plots of intrinsic N H versus the orbital period of the system and versus the spin period of the pulsar, based on whether the companion is a Be or OB supergiant star. We also find a tentative but expected anti-correlation between N H and the orbital period, and a possible and unexpected correlation between the N H and the spin period.
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