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

Overview

The INTEGRAL IBIS All-Sky Survey of Hard X-Ray Sources table contains the results from a paper which is the second in a series devoted to the hard X-ray (17 - 60 keV) whole sky survey which has been performed by the INTEGRAL observatory over its first seven years of observations. This table contains the catalog of detected sources and includes 521 objects, 449 of which exceed a 5-sigma detection threshold on the time-averaged map of the sky, and 53 which were detected in various sub-samples of exposures. Among the identified sources with known and suspected natures, 262 are Galactic (101 low-mass X-ray binaries, 94 high-mass X-ray binaries, 37 cataclysmic variables, and 30 of other types) and 221 are extragalactic, including 217 active galactic nuclei (AGNs) and 4 galaxy clusters. The extragalactic (|b| > 5 degrees) and Galactic (|b| < 5 degrees) persistently detected source samples have high identification completeness (respectively ~96% and ~93%) and are valuable for population studies.

The current INTIBISASS table is based on the data provided in Krivonos et al. (2010: Paper II below) and replaces the earlier version available at the HEASARC from February 2008 to December 2010 which was based on Krivonos et al. (2007).

Catalog Bibcode

2010A&A...523A..61K

References

INTEGRAL/IBIS 7-year all-sky hard X-ray survey.
II. Catalog of sources.
    Krivonos R., Tsygankov S., Revnivtsev M., Grebenev S., Churazov E.,
    Sunyaev R.
   <Astron. Astrophys. 523, A61 (2010)>
   =2010A&A...523A..61K
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 updated by the HEASARC in December 2010 based on the CDS catalog J/A+A/523/A61 (specifically, the table2.dat and refs.dat files). It was originally created by the HEASARC in February 2008 based on CDS catalog J/A+A/475/775, which was superseded by this version.

Parameters

Source_Number
A running source number, in order of increasing J2000 RA, which uniquely identifies the hard X-ray source. There are 534 entries for 521 unique sources in this table, with some variable sources having multiple entries for different revolution ranges.

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 with 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. The positional accuracy of sources detected by IBIS/ISGRI depends on the source significance. The estimated 68% confidence intervals for sources detected at 5-6, 10 and >20 sigma are 2.1, 1.5 and <0.8 arcminutes, respectively. (Krivonos et al.2007: Paper I).

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. The positional accuracy of sources detected by IBIS/ISGRI depends on the source significance. The estimated 68% confidence intervals for sources detected at 5-6, 10 and >20 sigma are 2.1, 1.5 and <0.8 arcminutes, respectively. (Krivonos et al.2007: Paper I).

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 units of 10^-11 erg cm^-2 s^-1 = 0.7 milliCrab, given that 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. The source flux was either that measured in the 7-year time averaged map (December 2002 - July 2009), or, if the parameter revolution_range is set, over the indicated INTEGRAL spacecraft revolution interval 'n m' where n is the starting revolution and m is the ending revolution (the latter is usually the source flux during an outburst). The time range corresponding to a given INTEGRAL revolution number can be found on the INTEGRAL Science Operations Center website at by clicking on the 'Schedule Information' link in the left-hand menu bar.

Flux_Error
The 1-sigma error in the time-averaged 17 - 60 keV flux of the source in units of 10^-11 erg cm^-2 s^-1 = 0.7 milliCrab.

Revolution_Range
The revolution range (starting ending) to which the quoted flux measurement corresponds. If blank, the quoted source flux is that measured in the 7-year time averaged map. The time range corresponding to a given INTEGRAL revolution number can be found on the INTEGRAL Science Operations Center website at by clicking on the 'Schedule Information' link in the left-hand menu bar.

Source_Type
The general astrophysical type of the object:

      LMXB (HMXB) - low- (high-) mass X-ray binary,
      AGN - active galactic nucleus,
      AXP - anomalous X-ray pulsar,
      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,
      SymbStr - symbiotic star,
      Star - star,
      Cluster - cluster of galaxies,
      NucStrCl - The Galactic Center nuclear star cluster.

A question mark indicates that the specified source type is not firmly determined, so it should be treated with caution.

Author_1
The author(s) of the first reference discussing the specified source. These are mainly provided for new sources and are related to their discovery and/or their nature.

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

Author_2
The author(s) of the second reference discussing the specified source. These are mainly provided for new sources and are related to their discovery and/or their nature.

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

Author_3
The author(s) of the third reference discussing the specified source. These are mainly provided for new sources and are related to their discovery and/or their nature.

Ref_Bibcode_3
The bibliographic code (bibcode) of the third reference discussing the specified source. These are mainly provided for new sources and are related to their discovery and/or nature.

Author_4
The author(s) of the fourth reference discussing the specified source. These are mainly provided for new sources and are related to their discovery and/or their nature.

Ref_Bibcode_4
The bibliographic code (bibcode) of the fourth reference discussing the specified 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 such as the type subclass, redshift information, and/or alternative source designations. Redshifts of the extragalactic sources were obtained from the SIMBAD and/or NED databases.

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 Help Desk.

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:29:15 EDT