Renewed X-ray activity of IGR J17419-2802 and GRS 1736-297 observed with INTEGRAL
ATel #744; S. A. Grebenev (IKI, Moscow), S. V. Molkov (IKI, Moscow), R. A. Sunyaev (IKI, Moscow; MPA, Garching)
on 22 Feb 2006; 18:01 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: S.A.Grebenev (sergei@hea.iki.rssi.ru)
Subjects: Radio, Infra-Red, Optical, X-ray, Request for Observations, Black Hole, Neutron Star, Transient
Two X-ray transients, IGR J17419-2802 and GRS 1736-297, were found to be in outburst with the IBIS/ISGRI telescope on board INTEGRAL on February 19-20, 2006, during deep Open Program observations of the Galactic center field.
The first source, IGR J17419-2802, was detected with the signal-to-noise (S/N) ratio 12.2 and the average flux 7.7+/-0.6 mCrab in the 18-45 keV band. This source was discovered by
INTEGRAL in September 2005 (ATEL #616), was localized with a few arcsec accuracy by SWIFT/XRT (ATEL #617) but still was not identified.
GRS 1736-297 was detected with the S/N ratio 6.8 and the average flux 4.4+/-0.6 mCrab in the same 18-45 keV band. The source was discovered by the GRANAT/ART-P telescope in September-October 1990 (Pavlinsky et al., SvAL, 1992, 18, 88), detected in the ROSAT all-sky survey (as 1RXS J173930.3-294211) and suspected to be a Be-system by Motch et al. (A&A, 1998, 132, 341). It has not been detected in all subsequent X-ray observations including the pointed observation with Chandra (Wilson et al., ApJ, 2003, 596, 1220).
We encourage follow-up observations of both sources at all wavelengths.
