Hard X-ray observations of Cygnus X-1 with the MISO telescope

Details Hard X-ray observations of Cygnus X-1 with the MISO telescope Hard X-ray observations of Cygnus X-1 with the MISO telescope

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300..297p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 300, Jan. 1, 1986, p. 297-303.

Astronomy and Astrophysics

Astronomy

14

Black Holes (Astronomy), Gamma Ray Astronomy, X Ray Binaries, Angular Distribution, Crab Nebula, Cygnus Constellation, Light Curve, Telescopes

Scientific paper

The results of hard X-ray, soft gamma-ray observations of the galactic black hole candidate, Cyg X-1, taken with the MISO telescope in October 1979 and May 1980 are presented, confirming the 'superlow' state measured during September-October 1979 by the HEAO 3 satellite. The 1980 observation coincides with a low- to high-state transition and is consistent with HEAO 3 observations taken at the same epoch. No gamma-ray counting-rate excess above 200 keV was recorded in either observation. Apart from these two measurements, the observation of the Crab Nebula as an a posteriori calibration source is also described.

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