Unveiling the Nature of IGR J17177-3656 with X-Ray, Near-infrared, and Radio Observations
Nowak, M. A.; Chaty, S.; Rodriguez, J.; Wilms, J.; Ubertini, P.; Chini, R.; Del Santo, M.; Corbel, S.; Paizis, A.
Italy, United States, Germany, France, Chile
Abstract
We report on the first broadband (1-200 keV) simultaneous Chandra-INTEGRAL observations of the recently discovered hard X-ray transient IGR J17177-3656 that took place on 2011 March 22, about two weeks after the source discovery. The source had an average absorbed 1-200 keV flux of about 8 × 10-10 erg cm-2 s-1. We extracted a precise X-ray position of IGR J17177-3656, αJ2000 = 17h17m42.s62, δJ2000 = -36°56'04farcs5 (90% uncertainty of 0farcs6). We also report Swift, near-infrared, and quasi-simultaneous radio follow-up observations. With the multi-wavelength information at hand, we propose IGR J17177-3656 is a low-mass X-ray binary, seen at high inclination, probably hosting a black hole.