Astronomy and Astrophysics – Astronomy
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pinsa..64..407a&link_type=abstract
PINSA-A (Proc. Indian Natl. Sci. Acad. A, Phys. Sci.), Vol. 64, No. 3, p. 407 - 421
Astronomy and Astrophysics
Astronomy
Space Missions: X-Ray Astronomy, X-Ray Binaries: Black Holes
Scientific paper
The growth of X-ray astronomy since its beginning in 1962 is briefly discussed. Different types of X-ray sources are described and a detailed discussion of the characteristics of X-ray binaries is presented. The present international status of research in the studies of the X-ray binaries is summarized with special reference to the results from current satellite missions. Recent discovery of quasi-periodic oscillations with frequency in the range of about 500 -1200 Hz from several low mass X-ray binaries and their origin are discussed. Some of the important results from the X-ray spectroscopic observations with the ASCA satellite are highlighted. Details of the IXAE (Indian X-ray Astronomy Experiment) are presented and important results obtained with it so far are described in some detail with reference to the black hole binary source Cyg X-1 and GRS 1915+105. The recent discovery of regular X-ray bursts with the IXAE from GRS 1915+105, which have the unique characteristics of slow rise and fast decay, is described in detail and it is shown that this is a possible indication of matter disappearing into the event horizon of a black hole.
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