Strong X-ray bursts observed from Cygnus X-1

Details Strong X-ray bursts observed from Cygnus X-1 Strong X-ray bursts observed from Cygnus X-1

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sval....2...92k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 2, May 1976, p. 235-239.) Soviet Astronomy Letters, vol. 2, May-June 1976, p. 92-94. Tr

Astronomy and Astrophysics

Astronomy

1

Binary Stars, Radiant Flux Density, Spaceborne Astronomy, X Ray Sources, Black Holes (Astronomy), Bremsstrahlung, Energy Spectra, Salyut Space Station, Supergiant Stars, X Ray Spectra

Scientific paper

During observations of Cyg X-1 with the X-ray telescope-spectrometer on board the Salyut-4 station, 19 intense bursts of X-ray emission were detected within 5 min on July 22, 1975. The flux in the bursts increased from 3 to 20 times. The burst spectrum may be fitted by a power law with kT values ranging from less than 1 keV to 4 keV and a hydrogen column density exceeding 10 to the 23rd power atoms/sq cm.

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