Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..157p&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 94, Feb. 1982, p. 157-161.
Astronomy and Astrophysics
Astronomy
14
B Stars, Early Stars, Radiant Flux Density, Stellar Spectrophotometry, Uhuru Satellite, X Ray Sources, Bremsstrahlung, Cassiopeia Constellation, Data Reduction, Heao, Oao 3, Periodic Variations, Sas-3, Spectral Energy Distribution, Spectrum Analysis
Scientific paper
X-ray observations are presented of the Be star Gamma Cas obtained with the Uhuru satellite between December 27, 1970, and February 15, 1973. Though variable, the X-ray source (MX 0053+60) persisted throughout the life-time of the Uhuru satellite, with an average daily flux (2-6 keV) of 4.1 counts/s or 4.0 x 10 to the 32nd ergs/s if the star is at a distance of 220 pc. Variations on time scales of months, days, and hours were observed, but a pulsation period was not found. An analysis is made of the continuous X-ray spectrum, and the X-ray flux and its behavior during the early 1970s are compared with more recent observations from the SAS-3, Copernicus, HEAO-1, and Einstein satellites.
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