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2012 Chandra Non-Detection of the Fading X-ray Transient IGR J17494-3030

ATel #4886; Deepto Chakrabarty (MIT), Peter G. Jonker (SRON), Craig B. Markwardt (NASA/GSFC)
on 13 Mar 2013; 19:01 UT
Credential Certification: Deepto Chakrabarty (deepto@space.mit.edu)

Subjects: X-ray, Binary, Black Hole, Neutron Star, Transient

We report on an archival Chandra/ACIS-S observation of the suspected neutron star or black hole X-ray transient IGR J17494-3030, which was discovered in 2012 March (ATels #3984, #3985). Our 970.7 s observation was made on 2012 April 14 (16:19 TT), 27 days after the source was first detected by INTEGRAL. No X-ray sources were detected in or near the 2.2 arcsec X-ray error circle measured by Swift/XRT (ATel #3989). The 95%-confidence upper limit on the ACIS-S count rate from the source is <0.002 count/s. This corresponds to an absorbed source flux of <3e-14 erg/cm^2/s (1-10 keV), assuming an absorbed power-law spectrum with a photon index of 2.5 and a hydrogen column density of 2.1e22 cm^(-2) as measured by Swift/XRT on 2012 March 20 (ATel #3989).