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INTEGRAL detects SWIFT J174535.5-290135.6

ATel #756; J. Chenevez (DNSC, Denmark), C. Sanchez-Fernandez (ESA/ESAC, Spain), E. Kuulkers (ESA/ESAC, Spain), S. Shaw (Southampton, UK/ ISDC, Switzerland), S. Brandt (DNSC, Denmark), T. J.-L. Courvoisier (ISDC, Switzerland), K. Ebisawa (NASA/GSFC, USA), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (NASA/GSFC, USA), N. Mowlavi (ISDC, Switzerland), T. Oosterbroek, A. Orr (ESA/ESTEC, Netherlands), A. Paizis (IASF, Milano), R. Wijnands (UvA, Netherlands)
on 2 Mar 2006; 22:38 UT
Credential Certification: Erik Kuulkers (ekuulker@rssd.esa.int)

Subjects: X-ray, Binary, Transient, Variables

Referred to by ATel #: 1005, 1058, 1513

We report on a detection of the new source SWIFT J174535.5-290135.6 (ATel #753) by the JEM-X monitor during INTEGRAL Galactic Bulge monitoring observations taken between 2006, 17 Feb 21:11 and 18 Feb 00:53 UTC (comprising ~10ks), i.e., a week earlier than the SWIFT detection. At that time the average JEM-X flux was 9 mCrab (+/-1 mCrab) in the 6-10 keV band. The average flux measured by ISGRI was near the detection level, i.e., about 6 mCrab (20-60 keV). The derived JEM-X position (RA= 17h 45m 39s, Dec= -29d 01m 44s) is 47 arcsec from the SWIFT position, which is well inside our uncertainty radius of ~2 arcmin.

The source was not detected above an estimated upper limit of ~7 mCrab (6-10 keV) either during previous Galactic Bulge observations performed on Feb 9, Feb 11/12, and Feb 14/15, or during further Galactic Bulge observations performed on Feb 20/21, Feb 24, and Feb 27 Feb. This is in agreement with the flux measured by SWIFT at ~0.7mCrab (0.2-10 keV) on Feb 25, and suggests that the source flux was gradually decreasing.