Hard X-ray observations of Circinus X-1 during an outburst

Details Hard X-ray observations of Circinus X-1 during an outburst Hard X-ray observations of Circinus X-1 during an outburst

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.262..563c&link_type=abstract

Nature, vol. 262, Aug. 12, 1976, p. 563, 564.

Astronomy and Astrophysics

Astronomy

11

Cosmic X Rays, Power Spectra, Radiant Flux Density, Spaceborne Astronomy, X Ray Sources, Ariel Satellites, Collimators, Photon Density, Scintillation Counters, Stellar Radiation

Scientific paper

Observations of Circinus X-1 obtained by the Imperial College hard X-ray scintillation telescope experiment are considered together with data from the rotation modulation collimator aboard the satellite Ariel V to provide an overall view of the spectral behavior of this source during the outburst of Feb. 25, 1976. The power law given by Baity et al. (1975) fits the data for the period before the outburst. It is suggested that the large scale low energy X-ray outbursts of the 'supervariable' Cir X-1 may be interpreted as the results of periodic removal of a dense screening gas to expose a relatively stable source with a power law spectrum.

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