INTIBISASS - INTEGRAL IBIS All-Sky Survey of Hard X-Ray Sources

Overview

The INTEGRAL IBIS All-Sky Survey of Hard X-Ray Sources Catalog contains the results of an all-sky hard X-ray survey based on almost four years of observations with the IBIS telescope onboard the INTEGRAL observatory. The dead time-corrected exposure of the survey is about 33 Ms. Approximately 12% and 80% of the sky has been covered to limiting fluxes lower than 1 and 5 mCrab, respectively. The catalog of detected sources includes 403 objects, 316 of which exceed a 5-sigma detection threshold on the time-averaged map of the sky, and the rest were detected in various subsamples of exposures. Among the identified sources, 219 are Galactic (90 low-mass X-ray binaries, 76 high-mass X-ray binaries, 21 cataclysmic variables, 6 coronally active stars, and other types) and 137 are extragalactic, including 130 active galactic nuclei (AGNs) and 3 galaxy clusters. The authors derived number-flux functions of AGNs and Galactic sources. The log N-log S relation of non-blazar AGNs is based on 68 sources located at Galactic latitudes |b| > 5 degrees, where the survey is characterized by high identification completeness, with fluxes higher than S_lim = 1.1 x 10^-11 erg s^-1 cm^-2 (~0.8 mCrab) in the 17 - 60 keV energy band. The cumulative AGN number-flux function can be described by a power law with a slope of 1.62 +/- 0.15 and normalization of (5.7 +/- 0.7) x 10-3 sources per deg^2 at fluxes > 1.43 x 10^-11 erg s^-1 cm^-2 (>1 mCrab). Those AGNs with fluxes higher than S_lim make up ~1% of the cosmic X-ray background at 17-60 keV.

Catalog Bibcode

2007A&A...475..775K

References

Catalog of hard X-ray sources detected in all-sky survey performed with
INTEGRAL observatory.
    Krivonos R., Revnivtsev M., Lutovinov A., Sazonov S., Churazov E.,
    Sunyaev R.
   <Astron. Astrophys. 475, 775 (2007)>
   =2007A&A...475..775K

Provenance

This table was created by the HEASARC in February 2008 based on CDS catalog J/A+A/475/775 files table1.dat and table2.dat.

Parameters

Source_Number
A running source number, in order of increasing J2000 RA, which uniquely identifies the hard X-ray source.

Name
The name of the hard X-ray source. For sources whose nature was known before their detection by INTEGRAL, their common names are given. Sources discovered by INTEGRAL or those whose nature was established thanks to INTEGRAL are named withe an "IGR" prefix.

RA
The Right Ascension of the source in the selected equinox. This was given in J2000 decimal degrees and to a precision of 0.001 degrees in the original table.

Dec
The Declination of the source in the selected equinox. This was given in J2000 decimal degrees and to a precision of 0.001 degrees in the original table.

LII
The Galactic Longitude of the source.

BII
The Galactic Latitude of the source.

Confusion_Flag
This flag parameter is set to 'c' to indicate spatial confusion: the fluxes of such confused sources should be taken with caution.

Flux
The time-averaged 17 - 60 keV flux of the source in mCrab units. A flux of 1 mCrab corresponds to 1.43 x 10^-11 erg s^-1 cm^-2 for a source with a Crab-like spectrum.

Flux_Error
The 1-sigma error in the source 17 - 60 keV flux, in mCrab.

Revolution_Range
If this parameter is poultade, then the source flux was measured on the map averaged over the indicated INTEGRAL spacecraft revolution.

Source_Type
The general astrophysical type of the object:

      LMXB (HMXB) - low- (high-) mass X-ray binary,
      AGN - active galactic nucleus,
      SNR/PWN - supernova remnant/pulsar wind nebula,
      CV - cataclysmic variable,
      PSR/PWN - isolated pulsar or pulsar wind nebula,
      SGR - soft gamma repeater,
      RS CVn - coronally active binary star,
      SymbStar - symbiotic star,
      Cluster - cluster of galaxies.

Ref_Bibcode_1
The bibliographic code (bibcode) of a reference discussing the source. These are mainly provided for new sources and are related to their discovery and/or nature.

Ref_Bibcode_2
The bibliographic code of a second reference discussing the source. These are mainly provided for new sources and are related to their discovery and/or nature.

Notes
For some sources, there are additional notes and/or alternative source names given in this field.

Class
The HEASARC Browse object classification, based on the classification given in the source_type parameter.

Contact Person

Questions regarding the INTIBISASS database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: Thursday, 14-Feb-2008 15:37:30 EST

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