INTEGRAL observes IGR J17464-3213 in the soft state
ATel #180; P. Kretschmar (ISDC, Geneva & MPE, Garching), J. Chenevez (DSRI, Copenhagen), F. Capitanio (IASF/CNR, Roma), A. Orr (ESTEC, Noordwijk), G. Palumbo (Universita degli Studi di Bologna), S. Grebenev (IKI, Moscow)
on 21 Aug 2003; 18:16 UT
Credential Certification: Peter Kretschmar (Peter.Kretschmar@obs.unige.ch)
Subjects: X-ray, Gamma Ray, Black Hole, Transient
Referred to by ATel #: 189
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.