Five new INTEGRAL unidentified hard X-Ray sources uncovered by Chandra

Abstract

The IBIS imager on board INTEGRAL, with a sensitivity better than a mCrab in deep observations and a point source location accuracy of the order of few arcminutes, has localized so far 723 hard X-ray sources in the 17--100 keV energy band, of which a fraction of about 1/3 are still unclassified. The aim of this research is to provide sub-arcsecond localizations of the unidentified sources, necessary to pinpoint the optical and/or infrared counterpart of those objects whose nature is so far unknown. The cross-correlation between the new IBIS sources published within the fourth INTEGRAL/IBIS Survey catalogue and the CHANDRA/ACIS data archive resulted in a sample of 5 not yet identified objects. We present here the results of CHANDRA X-ray Observatory observations of these five hard X-ray sources discovered by the INTEGRAL satellite. We associated IGR J10447-6027 with IR source 2MASSJ10445192-6025115, IGR J16377-6423 with the cluster CIZA J1638.2-6420, IGR J14193-6048 with the pulsar with nebula PSR J1420-6048 and IGR J12562+2554 with the Quasar SDSSJ125610.42+260103.5. We suggest that the counterpart of IGR J12288+0052 may be an AGN/QSO type~2 at a confidence level of 90%.

ApJ accepted

References in corpus (8)

• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release
• A Catalog of Galaxy Clusters Observed by XMM-Newton
• Chandra Multiwavelength Project X-ray Point Source Catalog
• A Full Year's Chandra Exposure on SDSS Quasars from the Chandra Multiwavelength Project
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
• Hard X-ray emission from Eta Carinae
• X-ray Properties of Intermediate-Redshift Groups of Galaxies

Cited by in corpus (10)

• INTEGRAL/IBIS nine-year Galactic Hard X-Ray Survey
• The soft gamma-ray pulsar population: an high-energy overview
• INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part II: Catalog of Sources
• The INTEGRAL/IBIS AGN catalogue I: X-ray absorption properties versus optical classification
• INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. IX. 22 more identifications, and a glance into the far hard X-ray Universe
• Chandra Observations of Eight Sources Discovered by INTEGRAL
• Spectroscopic identification of INTEGRAL high-energy sources with VLT/ISAAC
• NuSTAR observations of the unidentified INTEGRAL sources: constraints on the Galactic population of HMXBs
• Chandra Identification of Two AGN Discovered by INTEGRAL