A description of sources detected by INTEGRAL during the first 4 years of observations

Abstract

Parameters from the literature, such as positions, photoelectric absorption (nH), spin and orbital periods, and distances or redshifts, were collected for all ~500 sources detected by INTEGRAL-ISGRI so far. We investigate where new and previously-known sources detected by ISGRI fit in the parameter space of high-energy objects, and we use the parameters to test correlations expected from theoretical predictions. For example, the influence of the local absorbing matter on periodic modulations is studied for Galactic High-Mass X-ray Binaries (HMXBs) with OB supergiant and Be companions. We examine the spatial distribution of different types of sources in the Milky Way using various projections of the Galactic plane, in order to highlight signatures of stellar evolution and to speculate on the origin of the group of sources whose classifications are still uncertain. ISGRI has detected similar numbers of X-ray Binaries and Active Galactic Nuclei (AGN). The former group contains new members of the class of HMXBs with supergiant stellar companions. Thanks to these additional systems, we are able to show that HMXBs are generally segregated in plots of intrinsic nH versus the orbital period of the system and versus the spin period of the pulsar, based on whether the companion is a Be or an OB supergiant star. We also find a tentative but expected anti-correlation between nH and the orbital period, and a possible and unexpected correlation between the nH and the spin period. While only a handful of new Low-Mass X-ray Binaries (LMXBs) have been discovered, there are many sources that remain unclassified and they appear to follow a spatial distribution typical of Galactic sources (especially LMXBs) rather than extragalactic sources.

36 pages, 16 figures, 1 long table, accepted for publication in A&A (as of 23-2-07)

References in corpus (1)

• Unveiling the nature of INTEGRAL objects through optical spectroscopy. V. Identification and properties of 21 southern hard X-ray sources

Cited by in corpus (36)

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• INTEGRAL/IBIS nine-year Galactic Hard X-Ray Survey
• Advances in Understanding High-Mass X-ray Binaries with INTEGRAL and Future Directions
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
• Unveiling the nature of six HMXBs through IR spectroscopy
• An XMM-Newton view of FeKα in HMXBs
• Chandra Localizations and Spectra of INTEGRAL Sources in the Galactic Plane: The Cycle 9 Sample
• Distribution of High-Mass X-ray Binaries in the Milky Way
• Chandra Localizations and Spectra of INTEGRAL Sources in the Galactic Plane
• IGR J18483-0311: a new intermediate supergiant fast X-ray transient
• Spectral and Timing Nature of the Symbiotic X-ray Binary 4U 1954+319: The Slowest Rotating Neutron Star in an X-ray Binary System
• Swift Follow-up Observations of INTEGRAL Sources of Unknown Nature
• Discovery of an eccentric 30 days period in the supergiant X-ray binary SAX J1818.6-1703 with INTEGRAL
• The M Supergiant High Mass X-Ray Binary 4U 1954+31
• Optical/infrared observations unveiling the formation, nature and evolution of High-Mass X-ray Binaries
• Swift follow-up observations of 17 INTEGRAL sources of uncertain or unknown nature
• Chandra observations of five INTEGRAL sources: new X-ray positions for IGR J16393-4643 and IGR J17091-3624
• Peering through the stellar wind of IGR J19140+0951 with simultaneous INTEGRAL/RXTE observations
• The Galactic LMXB Population and the Galactic Centre Region
• The nature of the infrared counterpart of IGR J19140+0951
• The Galactic neutron star population I - an extragalactic view of the Milky Way and the implications for fast radio bursts
• Introduction to multi-messenger astronomy
• Multiwavelength Characterization of the High Mass X-ray Binary Population of M31
• Exploring the disc/jet interaction in the radio-loud quasar 4C +74.26 with Suzaku
• INTEGRAL, XMM-Newton and ESO/NTT identification of AX J1749.1-2733: an obscured and probably distant Be/X-ray binary
• Expected number of supergiant fast X-ray transients in the Milky Way
• Catalog of the Galactic population of X-ray pulsars in High-mass X-ray binary systems
• Probing the nature of IGR J16493-4348: Spectral and temporal analysis of the 1-100 keV emission
• Cataclysmic Variables in Triples: Formation Models and New Discoveries
• Broadband Suzaku observations of IGR J16207-5129
• NuSTAR J163433-4738.7: A Fast X-ray Transient in the Galactic Plane
• Multi-wavelength observations of the Be/X-ray binary IGR J01217-7257 (=SXP 2.16) during outburst
• The XMM Newton and INTEGRAL observations of the supergiant fast X-ray transient IGR J16328-4726
• Study of the distribution of High Mass X-ray Binaries in the Galaxy