GMRT observations of the field of INTEGRAL X-ray sources- I

Abstract

The INTEGRAL observatory has discovered a variety of hard X-ray sources in the Galactic plane since its launch. Using GMRT, we have made repeated observations of these sources to search for the radio counterparts of seventeen of them at low frequencies. The source positions were taken from the various ATEL and IAUC reporting their discovery. Possible radio counterparts for seven of these sources namely, IGR J06074+2205, IGR J15479-4529, IGR J16479-4514, IGR J17091-3624, IGR J18027-1455, IGR J18539+0727 and IGR J21247+5058 were detected within 3$\sigma$ of the position uncertainty derived from the INTEGRAL observations. The offset in the radio position was calculated using the positions mentioned in the ATEL. We have also analyzed the available NVSS images for a few of these fields at 1.4 GHz along with our observations. In this paper we present the radio images and the best fit positions for the positive detections. The X-ray variability for few of the sources within the time scales of 100 s to 1 ks as seen in the RXTE/PCA light curves suggests their Galactic origin and possible binary nature. We discuss briefly the characteristics of these sources from the available information at different wave bands.

14 pages, 10 figures,accepted in A&A

References in corpus (8)

• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• The optical/NIR counterpart of the INTEGRAL obscured source IGR J16318-4848 : a sgB[e] in a HMXB ?
• Constraining X-ray Binary Jet Models via Reflection
• Unveiling the nature of three INTEGRAL sources through optical spectroscopy
• XMM-Newton observations of the INTEGRAL X-ray transient J17544-2619
• Unveiling the Nature of the High Energy Source IGR J19140+0951
• Discovery of a new INTEGRAL source: IGR J19140+0951
• On the nature of the unidentified X-ray/gamma-ray sources IGR J18027-1455 and IGR J21247+5058

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• The peculiar 2011 outburst of the black hole candidate IGR J17091-3624, a GRS 1915+105 like source?
• Interplay between heartbeat oscillations and wind outflow in microquasar IGR J17091-3624
• The optical counterpart to IGR J06074+2205: a Be/X-ray binary showing disc loss and V/R variability
• A Possible Magnetar Nature for IGR J16358-4726
• Suzaku Observation of the Brightest Broad-Line Radio Galaxy 4C 50.55 (IGR J 21247+5058)
• Broadband X-ray spectrum of the newly discovered broad line radio galaxy IGR J21247+5058
• Spectral and temporal properties of the supergiant fast X-ray transient IGR J18483-0311 observed by INTEGRAL
• GMRT observations of the field of INTEGRAL X-ray sources- II (newly discovered hard X-ray sources)
• Multi-wavelength properties of the high-energy bright Seyfert 1 galaxy IGR J18027-1455