Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.177..513m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 177, Dec. 1976, p. 513-523. Research supported by the Science Research
Astronomy and Astrophysics
Astrophysics
47
Spaceborne Astronomy, Stellar Spectra, X Ray Astronomy, X Ray Sources, Ariel 5 Satellite, Astrophysics, Binary Stars, Energy Spectra, Long Term Effects, Oao 3, Spectrum Analysis, Stellar Luminosity
Scientific paper
Copernicus and Ariel V observations are reported for four X-ray sources which exhibit a correlation of intensity and spectral slope on timescales similar to that seen in Sco X-1. These sources include 3U 0614+09, 3U 1702-36 (Sco X-2), 3U 1728-16 (GX 9+9), and 3U 1758-25 (GX 5-1). The mean spectral parameters of each source are given, the short- and long-term behavior of different sources are described, and it is suggested that the similar X-ray characteristics of these four sources and Sco X-1 might indicate some degree of physical similarity as well as a similar optical and radio appearance. The observations are shown to strengthen the case for identifying 3U 0614+09 and 3U 1728-16 with relatively faint blue stars in or near their X-ray error boxes.
Charles Phil A.
Culhane Leonard J.
Mason Keith O.
Sanford Peter W.
Strong Keith Temple
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