Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981assl...87...79g&link_type=abstract
In: X-ray astronomy with the Einstein satellite; Proceedings of the Meeting, Cambridge, MA, January 28-30, 1980. (A82-33476 16-9
Astronomy and Astrophysics
Astronomy
21
Binary Stars, Globular Clusters, Heao 2, Proportional Counters, Stellar Evolution, X Ray Astronomy, Astronomical Models, Bursts, Luminosity, X Ray Sources, X Ray Spectra
Scientific paper
The Einstein X-ray Observatory globular cluster observation program has completed a survey of 30 clusters, using the HRI detector. Preliminary results are reported for a more sensitive survey being conducted with the imaging proportional counter (IPC) of the satellite, which has found four possible new sources in the first 32 clusters observed. Also described are detailed studies of several luminous, globular cluster sources, including the X-ray burst from Terzan 2, and an effort is made to locate the X-ray sources with respect to cluster centers. Sources of systematic error, required optical studies of globular cluster structure, and the implications of the plausible binary systems for cluster core evolution are discussed.
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