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New X-ray transient IGR J01363+6610 discovered by INTEGRAL

ATel #275; S. A. Grebenev (IKI, Moscow), P. Ubertini (IASF, Rome), J. Chenevez (DSRI, Copenhagen), A. Orr (ESTEC, Noordwijk), R. A. Sunyaev (IKI, Moscow & MPA, Garching)
on 11 May 2004; 13:23 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, Gamma Ray, Binary, Black Hole, Neutron Star, Transient

Referred to by ATel #: 276, 343

A previously unknown X-ray transient, IGR J01363+6610, was discovered by the IBIS/ISGRI telescope on April 19, 2004 during INTEGRAL observations dedicated to the Galactic Plane Scan.

The source position was R.A.=01h36m18s, Decl.=+66d10m36s (equinox 2000.0, position uncertainty 2'). It was within the IBIS field-of-view during 4 subsequent pointings (~2.3 h) and was detected with the total S/N ratio equal to 8.6 and an average flux 17+/-2 mCrab in the 17-45 keV band.

The detection was confirmed by the JEM-X telescope during one of the pointings (when the source was near the center of the JEM-X field-of-view). The JEM-X position was R.A.=01h36m04s, Decl.=+66d11m50s (position uncertainty 2'), the flux was about 9 mCrab in the 8-15 keV band.

The source was not detected with IBIS/ISGRI during next GPS observations of the region on May 1, 2004. The 3-sigma upper limit was 11 mCrab in the 17-45 keV band. The source was outside the JEM-X field-of-view that time.

We encourage observations of this source at other wavelengths.