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IGR J17464-3213 (= H1743-322) is active again

ATel #3263; E. Kuulkers (ESA/ESAC, Spain), J. Chenevez (DNSC, Denmark), D. Altamirano (UvA, The Netherlands), J. Alfonso-Garzon (LAEX-CAB/INTA-CSIC, Spain), V. Beckmann (ISDC, Switzerland), T. Bird (Southampton, UK), S. Brandt (DNSC, Denmark), T. Courvoisier (ISDC, Switzerland), A. Domingo (LAEX-CAB/INTA-CSIC, Spain), K. Ebisawa (ISAS, Japan), P. Jonker (SRON, The Netherlands), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (GSFC, USA), T. Oosterbroek (ESA/ESTEC, The Netherlands), A. Paizis (INAF-IASF, Italy), C. Sanchez-Fernandez (ESA/ESAC, Spain), R. Wijnands (UvA, The Netherlands)
on 7 Apr 2011; 09:34 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Erik Kuulkers (ekuulker@rssd.esa.int)

Subjects: X-ray, Binary, Black Hole, Transient, Variables

Referred to by ATel #: 3267, 3277, 3280, 3842, 3930

The INTEGRAL Galactic bulge (GB) monitoring program observations on UT April 6, 2011, 04:11-07:53 show that IGR J17464-3213 (= H1743-322) started another outburst. The observed JEM-X fluxes are 11 +/- 2 and 26 +/- 4 mCrab in the 3-10 and 10-25 keV energy bands, respectively, while the observed IBIS/ISGRI fluxes are 34 +/- 2 and 57 +/- 3 mCrab in the 18-40 and 40-100 keV energy bands, respectively. The source is clearly in a hard state. Previous GB observations (April 3, 15:13-19:21) did not reveal any significant emission, with JEM-X and IBIS/ISGRI upper limits of about 3 and 10 mCrab (5 sigma), respectively, in the above quoted energy bands. Swift/BAT observations indicate the outburst started around April 5. The source is also seen in the latest RXTE/PCA Galactic Center scan observations at April 6, 18:10: 15+/-1 mCrab (2-10 keV). The last outburst of this source was in Aug/Sep 2010 (ATels #2774, #2781, #2788, #2792, #2797, #2857). We encourage follow-up observations at all wavelengths.

INTEGRAL Galactic bulge monitoring program light curve
Swift/BAT Hard X-ray Transient Monitor light curve
RXTE/PCA Galactic Center Observations light curve