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

S. A. Grebenev*, P. Ubertini, J. Chenevez, A. Orr, R. A. Sunyaev

*Corresponding author for this work

Research output: Other contributionNet publication - Internet publicationResearch


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.
Original languageEnglish
Publication date11 May 2004
Publication statusPublished - 11 May 2004
SeriesThe Astronomer's telegram
NumberATel #275


  • Radio
  • Infra-red
  • Optical
  • X-ray
  • Gamma ray
  • Binary
  • Black hole
  • Neutron star
  • Transient


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