Integral/Ibis Census of the Sky Beyond 100 kev

Abstract

We report on the first census of INTEGRAL/IBIS detections ($\gtrsim 4\sigma$ significance) above 100 keV based on the Core Program and public Open time observations up to April 2005. There are 49 sources detected in the 100-150 keV band of which 14 are also seen in the 150-300 keV range. The low energy sample is dominated by X-ray binary systems of both low and high mass, but also includes 10 active galaxies. Of the binary systems that are detected above 150 keV, more than 50% are associated with black hole candidates, often reported as microquasars. The present survey results are then used to construct LogN-LogS curves for galactic and extragalactic objects in the 100-150 keV band: above a 1 mCrab sensitivity limit we expect that around 200 galactic sources and almost 350 active galaxies populate the sky above 100 keV. While the contribution of individual point sources to the total Galactic emission has been estimated to be around 70-80% between 100-300 keV, we find that active galaxies detected above 1 mCrab account for only about 3% of the cosmic hard X-ray background in the 100-150 keV band.

accepted ApJ

References in corpus (32)

• The Spectrum of Diffuse Cosmic Hard X-Rays Measured with HEAO-1
• Discovery of luminous pulsed hard X-ray emission from anomalous X-ray pulsars 1RXS J1708-4009, 4U 0142+61 and 1E 2259+586 by INTEGRAL and RXTE
• The first COMPTEL Source Catalogue
• INTEGRAL/RossiXTE high-energy observation of a state transition of GX 339-4
• A Hard X-ray survey of the Galactic Center with INTEGRAL/IBIS. Catalog of sources
• The broad-band spectrum of Cygnus X-1 measured by INTEGRAL
• The First INTEGRAL AGN Catalog
• INTEGRAL/IBIS survey of the Sagittarius Arm Tangent region: A source catalog
• INTEGRAL discovery of persistent hard X-ray emission from the Soft Gamma Ray Repeater SGR 1806-20
• Characterizing a new class of variability in GRS 1915+105 with simultaneous INTEGRAL/RXTE observations
• INTEGRAL/IBIS Extragalactic survey: 20-100 keV selected AGN
• X-Ray Observations of the Black Hole Transient 4U 1630-47 During Two Years of X-Ray Activity
• The Burst and Transient Source Experiment (BATSE) Earth Occultation Catalog of Low-Energy Gamma-Ray Sources
• INTEGRAL and XMM-Newton Spectral Studies of NGC 4388
• XTE J1550-564: INTEGRAL Observations of a Failed Outburst
• Simultaneous observations of the quasar 3C 273 with INTEGRAL, XMM-Newton and RXTE
• INTEGRAL and RXTE monitoring of GRS 1758-258 in 2003 and 2004. A transition from the dim soft state to the hard state
• High-energy observations of the state transition of the X-ray nova and black hole candidate XTE J1720-318
• SPI/INTEGRAL observation of the Galactic central radian: contribution of discrete sources and implication for the diffuse emission
• The broad-band X-ray spectrum of the blazar PKS B1830-211 by Chandra and INTEGRAL
• A hard X-ray survey of the Crux Galactic spiral arm tangent. A catalog of sources
• 1E 1740.7-2942: temporal and spectral evolution from INTEGRAL and RXTE observations
• The High Energy Spectrum of NGC 4151
• Global characteristics of the first IBIS/ISGRI catalogue sources: unveiling a murky episode of binary star evolution
• First INTEGRAL observations of Cygnus X-3
• 3-200 keV spectral states and variability of the INTEGRAL Black Hole binary IGR J17464-3213
• Spectral states of the X-ray binary IGR J17091--3624 observed by INTEGRAL and RXTE
• INTEGRAL observations of the PSR B1259-63 / SS2883 system after the 2004 periastron passage
• First results from TOO observations of the Aql X-1 field with INTEGRAL
• INTEGRAL observations of the Be/X-ray binary EXO 2030+375 during outburst
• INTEGRAL high energy behaviour of 4U 1812-12
• Hard X-ray sky survey with the SIGMA telescope aboard GRANAT observatory

Cited by in corpus (17)

• INTEGRAL/IBIS all-sky survey in hard X-rays
• BAT X-ray Survey - III: X-ray Spectra and Statistical Properties
• The INTEGRAL Galactic bulge monitoring program: the first 1.5 years
• INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part II: Catalog of Sources
• INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part I: Image Reconstruction
• INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
• INTEGRAL: science highlights and future prospects
• The INTEGRAL view on Black Hole X-ray Binaries
• INTEGRAL spectral variability study of the atoll 4U 1820-30: first detection of hard X-ray emission
• An Atlas of Exotic Variability in IGR J17091-3624: A Comparison with GRS 1915+105
• The Galactic LMXB Population and the Galactic Centre Region
• INTEGRAL 11-year hard X-ray survey above 100 keV
• INTEGRAL view of AGN
• 15 years of Galactic surveys and hard X-ray Background measurements
• Astrophysics in 2006
• The catalog of variable sources detected by INTEGRAL I: Catalog and Techniques
• INTEGRAL high energy sky: The keV to MeV cosmic sources