The nature of 19 X-ray sources detected with INTEGRAL

Details The nature of 19 X-ray sources detected with INTEGRAL The nature of 19 X-ray sources detected with INTEGRAL

2011-12-01

arxiv.org/abs/1112.0318v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 1 figure, 1 table. To appear in: proceedings of the INTEGRAL conference "The Extreme and Variable High Energy Sky", h

Scientific paper

Since its launch on October 2002, the INTEGRAL satellite has revolutionized our knowledge of the hard X-ray sky thanks to its unprecedented imaging capabilities and source detection positional accuracy above 20 keV. Nevertheless, many of the newly-detected sources in the INTEGRAL sky surveys are of unknown nature. The combined use of available information at longer wavelengths (mainly soft X-rays and radio) and of optical spectroscopy on the putative counterparts of these new hard X-ray objects allows pinpointing their exact nature. Continuing our long-standing program running since 2004, here we report the classification, through optical spectroscopy, of 19 more unidentified or poorly studied high-energy sources detected with the IBIS instrument onboard INTEGRAL.

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