Hard X-ray observations of GRS 1009-45 with the SIGMA telescope

Details Hard X-ray observations of GRS 1009-45 with the SIGMA telescope Hard X-ray observations of GRS 1009-45 with the SIGMA telescope

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410..957g&link_type=abstract

The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 957-961 (1997).

Other

Novae, Dwarf Novae, Recurrent Novae, And Other Cataclysmic Variables, Cataclysmic Binaries, Symbiotic Stars, X-Ray Sources, X-Ray Bursts, Black Holes, X-Ray

Scientific paper

We report on hard X-ray observations of X-ray Nova Velorum 1993 (GRS 1009-45) performed with the SIGMA coded mask X-ray telescope in January 1994. The source was clearly detected with a flux of about 60 mCrab in the 40-150 keV energy band during the two observations with a hard spectrum (α~-2.1) extending up to ~150 keV. These observations confirm the duration of the activity of the source in hard X-rays over 100 days after the first maximum and suggest a spectral hardening which has already been observed in Nova Muscae 1991. These and other characteristics found in these observations strengthen the case for this Nova to be a Black Hole candidate similar to Nova Muscae.

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