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INTEGRAL TOO observations of GX 339-4

ATEL # 986; S. Soldi (ISDC, Switzerland), J. Miller (Univ. of Michigan), E. Kuulkers (ESA/ESAC), M.D. Caballero-Garcia (LAEFF/INTA), M. Diaz Trigo (ESA/ESAC), on behalf of a larger collaboration
on 1 Feb 2007; 14:04 UT
Password Certification: Erik Kuulkers (

Subjects: X-ray, Gamma Ray, Binaries, Black Holes, Transients, Variables
Referred to by ATEL #: 987

Quick-look analysis of the first of a series of INTEGRAL ToO observations (ATel #980) shows that GX 339-4 has brightened with respect to the fluxes reported in Atel #980. The source, observed between UT 2007 Jan 30 15:56 and Feb 1 06:11, was detected by both IBIS/ISGRI and JEMX with fluxes of about 380 mCrab, 570 mCrab, 650 mCrab and 610 mCrab in the 3-10 keV, 10-20 keV, 20-40 keV and 40-80 keV bands, respectively.

We note that the next set of ToO observations (see ATel #980) are currently foreseen between 2007, Feb 14 19:01 and Feb 16 05:33. Again, contemporaneous radio and IR observations are particularly encouraged.

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R. E. Rutledge , Editor
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