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NTEGRAL discovered a new transient source IGRJ16465-4507

ATel #329; A. Lutovinov (IKI, Moscow), J. Rodrigues (ISDC, Versoix, CEA, Saclay), C. Budtz-Jorgensen (DSRI, Copenhagen), S. Grebenev (IKI, Moscow), C. Winkler (ESA/ESTEC, Noordwijk)
on 8 Sep 2004; 18:48 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: A.Lutovinov (aal@hea.iki.rssi.ru)

Subjects: X-ray, Request for Observations, Transient

Referred to by ATel #: 336, 338, 429

The new transient source IGRJ16465-4507 was detected with the ISGRI detector of the IBIS telescope of the INTEGRAL observatory on 6-7 Sept., 2004. The best position derived from our analysis is RA=16h46.5m and DEC=-45o07.5m (equinox 2000, preliminary uncertainty ~2.5'). IGR J16465-4507 is therefore ~16 arcmin from the INTEGRAL source IGR J16479-4514, which was also detected at the same time.

The new source was detected by IBIS/ISGRI with a flux of 8.8+/-0.9 mCrab in the 18-60 keV energy band. A strong flare with an average flux of ~28 mCrab in the same energy band was observed from the source on Sept. 7 UT 12:00. It then decayed back to the pre flare value after this episode.

We encourage follow up observations at various wavelengths.