Energy spectrum variability of Cygnus X-1 in hard X-rays

Details Energy spectrum variability of Cygnus X-1 in hard X-rays Energy spectrum variability of Cygnus X-1 in hard X-rays

Mar 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...196..597f&link_type=abstract

Astrophysical Journal, vol. 196, Mar. 1, 1975, pt. 1, p. 597-599.

Astronomy and Astrophysics

Astronomy

11

Binary Stars, Energy Spectra, Stellar Spectra, X Ray Spectra, X Ray Stars, Balloon Flight, Black Holes (Astronomy), Mass Transfer, Variable Stars, X Ray Sources

Scientific paper

Energy spectrum analysis of a balloon observation of Cygnus X-1 is reported. During a period of flaring activity of the source, a much softer spectrum than usual, fitted by a power law with number index 2.7, has been found. The 'normal status' of flux is attained in a rather smooth way. During this last period the energy spectrum is well represented by a power law with number index 1.84, in agreement with other observations.

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