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Brightening of H1743-322 and the Rapid Burster

ATel #593; P. Kretschmar (ESA/ESAC, Spain); S. E. Shaw (Southampton, UK / ISDC, Geneva); E. Kuulkers (ESA/ESAC, Spain); R. Wijnands (UvA, Netherlands); M. Turler, N. Mowlavi, T. Courvoisier (ISDC, Geneva); C. Markwardt (NASA/GSFC, USA); T. Oosterbroek, A. Orr (ESA/ESTEC, Netherlands); A. Paizis (ISDC, Geneva / IASF, Milano); K. Ebisawa (NASA/GSFC, USA)
on 26 Aug 2005; 17:47 UT
Credential Certification: Peter Kretschmar (Peter.Kretschmar@obs.unige.ch)

Subjects: X-ray, Gamma Ray, Black Hole, Neutron Star, Transient

Referred to by ATel #: 598, 1739

Observations done on Aug 17 and 21, 2005 as part of the INTEGRAL Galactic Bulge monitoring campaign show further brightening of H1743-322 (ATel #575,#576) and an outburst of the rapid burster (4U 1730-335).

For H1743-322 the averaged spectrum is well fitted by a single powerlaw with a slope of 2.58+-0.08 in the range from 5-200 keV. Fluxes are 136+4-9 mCrab (5-20 keV) and 66+2-4 mCrab (20-100 keV) with 90% errors given.

The Rapid Burster is detected at a strength of 11+-2 mCrab in the ISGRI 20-60 keV data. RXTE PCA scans of the region show that the Rapid Burster has been active since Aug 16, with a peak flux (~100 mCrab, 2-10 keV) typical of one of its outbursts.

Quick-look light curves and mosaic images from the monitoring program are available to the public from the link below.

INTEGRAL Galactic Bulge Monitoring