Hard X-ray sources 1E1740.7-2942, GRS1758-258 and SLX1735-269 in the Galactic center field

Details Hard X-ray sources 1E1740.7-2942, GRS1758-258 and SLX1735-269 in the Galactic center field Hard X-ray sources 1E1740.7-2942, GRS1758-258 and SLX1735-269 in the Galactic center field

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997iwtu.conf..183g&link_type=abstract

"Proc. of the 2nd INTEGRAL Workshop "The Transparent Universe" (held in St. Malo, France, Sept. 16-20, 1996, eds. Winkler, C.; C

Other

Black Holes, X-Ray Sources, Spectral Classification, Galactic Center

Scientific paper

In 1990-1992 the Galactic center region was intensively studied with the instruments aboard GRANAT. We present the results of observations of three hard X-ray sources of the region: 1E1740.7-2942, GRS1758-258 and SLX1735-269. The first two sources were earlier included into the list of Galactic black hole candidates due to their hard Cyg X-1 type spectrum and X-ray luminosity very close to that of Cyg X-1. We show that SLX1735-269, located in the same region, also has a very hard spectrum, power law (alpha ~ 1.1) in the standard X-ray band. This allows us to consider it as another black hole candidate. Note in addition that no X-ray bursts or pulsations have been detected from this source during the period of GRANAT observations.

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