High activity of XTE J1743-363 detected with INTEGRAL
ATel #332; S. A. Grebenev (IKI, Moscow), R. A. Sunyaev (IKI, Moscow & MPA, Garching)
on 21 Sep 2004; 11:30 UT
Distributed as an Instant Email Notice Transients
Credential Certification: S.A.Grebenev (sergei@hea.iki.rssi.ru)
Subjects: Radio, Infra-Red, Optical, X-ray, Transient
Referred to by ATel #: 335
During INTEGRAL Open Program observations of the Galactic center region on Sept. 18-20, 2004, an X-ray transient was detected by IBIS/ISGRI with the S/N ratio of 9.5 at the position, R.A.= 17h43m00s, Dec.= -36d21m30s (equinox 2000.0, error radius 2') consistent with that of XTE J1743-363
(IAUC # 7120 ). The source was strongly variable with an average flux 10.0+/-1.1 mCrab in the 18-45 keV band.
XTE J1743-363 was discovered by RXTE in Feb. 1999 with the flux ranging from 3 to 15 mCrab in the 2-10 keV band. It was marginally (at the flux level of 1.7+/-0.2 mCrab) detected by IBIS/ISGRI in Sept. 2003 during our previous deep observations of the Galactic Center region (Revnivtsev et al., Astron. Lett., 2004, 30, 382). But INTEGRAL was unable to detected it during first-year Core Program observations and the source isn't present in the IBIS/ISGRI Galactic Plane Survey catalog by Bird et al. (ApJ, 2004, 607, L33).
We encourage follow-up observations of this source at all wavelengths.
