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INTEGRAL observes IGR J17464-3213 in the soft state

By Kretschmar, P.; Chenevez, J.1,2; Capitanio, F.; Orr, A.; Palumbo, G.; Grebenev, S.

From

National Space Institute, Technical University of Denmark1

Astrophysics, National Space Institute, Technical University of Denmark2

The X-ray transient and black hole candidate IGR J17464-3213 (ATEL #132) = H1743-322, XTE J1746-322 (ATEL #133, #136) has been observed again during the Galactic Center Deep Exposure of the INTEGRAL Core Program. Compared to previous INTEGRAL observations the source has now changed to a soft state and is visible with the JEM-X monitor.

The source fluxes were ~400 mCrab and ~120 mCrab in the energy ranges 4-6 and 6-10 keV respectively. No significant flux was detected above 20 keV neither with JEM-X nor with IBIS/ISGRI. The JEM-X spectrum can be described by a blackbody model with kT~0.88+-0.07 keV using a fixed absorption value of 2.5e22 derived from earlier observations.

No power law tail is required to fit the JEM-X data. From the JEM-X observations the source position is found to be R.A. = 17h46.3m, Decl. = -32o14.4' with an uncertainty of 0.5'. This is consistent with the VLA position reported in ATEL #137.

Language: English
Year: 2003
Types: Other
ORCIDs: Chenevez, J.
Keywords

Black hole Gamma ray Transient X-ray

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