Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pazh...17..116s&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 17, Feb. 1991, p. 116-125. In Russian. In Russian. In Russian.
Astronomy and Astrophysics
Astronomy
3
Galactic Nuclei, Milky Way Galaxy, X Ray Astronomy, X Ray Sources, X Ray Spectra, Astronomical Maps, Spaceborne Astronomy, X Ray Telescopes
Scientific paper
The paper reports the discovery of a new hard X-ray source in the vicinity of GX 5-1 by the orbital X-ray observatory Granat. The measured spectrum extends from 4 to 300 keV. The spectrum of GRS1758-258 is quite similar to that of 1E1740.7-2942, the only bright hard X-ray source detected by the SIGMA telescope in the region of the Galactic center. The data suggest that both sources can be considered as black hole candidates.
Babalyan G. G.
Ballet Jean
Churazov Eugene
Cordier Bertand
Dekhanov I.
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