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Article overview
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Investigating the X-ray counterparts to unidentified sources in the 1000-orbit INTEGRAL/IBIS catalogue | | R. Landi
; L. Bassani
; A. Bazzano
; A. J. Bird
; M. Fiocchi
; A. Malizia
; F. Panessa
; V. Sguera
; P. Ubertini
; | | Date: |
11 Apr 2017 | | Abstract: | The latest INTEGRAL/IBIS all-sky survey lists 219 hard X-ray sources whose
nature is still unknown. We report on our ongoing campaign aimed at identifying
these high-energy emitters by exploiting the focusing capabilities of the X-ray
Telescope (XRT, 0.2-10 keV) on board Swift, which allow an enhancement of the
source localisation to arcsec level, thus facilitating the identification of
the likely counterpart. By cross-correlating the list of the unidentified IBIS
sources included in the latest IBIS catalogue with Swift/XRT archival data, we
found a set of 14 objects, not yet reported in the literature, for which XRT
data were available. We found no detection in only one case, a single X-ray
association in 9 sources, and 2/3 associations in the remaining objects. We
then made use of multi-waveband archives to search for counterparts at other
wavelengths of these XRT detections and exploited X-ray spectral information in
an attempt to determine their nature and association with the IBIS object. As a
result of our analysis, we identified a single counterpart for 13 sources,
although in some cases its nature/class could not be assessed on the basis of
the information collected. More specifically, we found that SWIFT J0924.2-3141
and SWIFT J1839.1-5717 are absorbed AGN, while SWIFT J0800.7-4309 and 1SWXRT
J230642.8+550817 are Cataclysmic Variable binary systems. Finally, we found
that IGR J14059-6116 is likely associated with the Fermi source 3FGL
J1405.4-6119. In the case of XMMSL1 J030715.5-545536 no XRT counterpart was
detected. In all the other cases, optical/infrared spectroscopy is necessary to
classify properly each X-ray counterpart and confirm their association with the
INTEGRAL/IBIS detection. | | Source: | arXiv, 1704.3872 | | Services: | Forum | Review | PDF | Favorites | |
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