Searching for AGNs among unidentified INTEGRAL sources
arXiv:1105.3089 · doi:10.1111/j.1365-2966.2011.19065.x
Abstract
We report on a new method to identify Active Galactic Nuclei (AGN) among unidentified INTEGRAL sources. This method consists of cross-correlating unidentified sources listed in the fourth IBIS Survey Catalogue first with infrared and then with radio catalogues and a posteriori verifying, by means of X-ray and optical follow up observations, the likelihood of these associations. In order to test this method, a sample of 8 sources has been extracted from the fourth IBIS Catalogue. For 7 sources of the sample we obtained an identification, whereas the last one (IGR J03103+5706) has insufficient information for a clear classification and deserves more in-depth study. We identified three objects (IGR J08190-3835, IGR J17520-6018, IGR J21441+4640) as AGNs and suggest that three more (IGR J00556+7708, IGRJ17219-1509, IGR J21268+6203) are likely active galaxies on the basis of their radio spectra, near-infrared photometry and location above the Galaxy plane. One source (IGR J05583-1257) has been classified as a starburst galaxy but it might have been spuriously associated with the INTEGRAL detection.
11 pages, 4 figures, 6 tables; accepted for publication on MNRAS
References in corpus (2)
Cited by in corpus (7)
- The 105 month Swift-BAT all-sky hard X-ray survey
- The INTEGRAL/IBIS AGN catalogue I: X-ray absorption properties versus optical classification
- Unveiling the nature of the unidentified gamma-ray sources III: gamma-ray blazar-like counterparts at low radio frequencies
- The INTEGRAL/IBIS AGN catalogue: an update
- Localizing INTEGRAL Sources with Chandra: X-Ray and Multi-Wavelength Identifications and Energy Spectra
- Unveiling the nature of INTEGRAL objects through optical spectroscopy. IX. 22 more identifications, and a glance into the far hard X-ray Universe
- Stellar population properties for a sample of hard X-ray AGNs