IGR J16558-4150: a new hard X-ray transient detected by INTEGRAL
Abstract
A new hard X-ray transient has been discovered by the imager IBIS/ISGRI on board of INTEGRAL, during the public ToO observation of GX 339-4 conducted between 2007 Jan 30th 15:55 and 2007 Feb 1st 06:11 UTC (ATel #980, #986). The new source, IGR J16558-4150, was detected at the position RA = 253.95 DEC = -41.83, with 3 arcmin accuracy. The source was clearly visible in the 127 ksec mosaic image of the observation, with an average flux of about 8 mCrab and a detection significance of 8.6 sigma, in the 20-40 keV band.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- February 2007
- Bibcode:
- 2007ATel..987....1S
- Keywords:
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- X-ray;
- Transients