Two hard X-ray sources in 100 square degrees around the Galactic Center

Details Two hard X-ray sources in 100 square degrees around the Galactic Center Two hard X-ray sources in 100 square degrees around the Galactic Center

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247l..29s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 2, July 1991, p. L29-L32.

Astronomy and Astrophysics

Astronomy

122

Black Holes (Astronomy), Galactic Nuclei, Gamma Ray Astronomy, Milky Way Galaxy, X Ray Sources, Imaging Techniques, Spaceborne Astronomy, Spaceborne Telescopes, X Ray Astronomy, X Ray Imagery

Scientific paper

Observations of the Galactic Center are described for which two telescopes operate at energies ranging from 4-30 KeV and 35-1300 KeV isolate only two persistent bright sources within 100 square degrees of the center. The sources are 1E1740.7-2942, which is well known, and the more recently detected GRS1758-258, and all other sources in the vicinity are significantly weaker. The hard spectra of the strong sources indicate that they are candidates for black holes.

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