Computer Science – Sound
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ijrsp..20..232a&link_type=abstract
(Thirty years of scientific ballooning in India; Symposium, Hyderabad, India, Oct. 22-24, 1990, Selected Papers. A92-23051 08-99
Computer Science
Sound
1
Balloon Sounding, Cosmic X Rays, X Ray Astronomy, Atmospheric Radiation, Atmospheric Sounding, Background Radiation, India
Scientific paper
The hard X-ray studies of cosmic X-ray sources carried out with the balloon-borne instruments launched from Hyderabad (India) during 1968-1990 period are discussed. Advantages of making hard X-ray astronomy observations from Hyderabad are pointed out and the X-ray telescopes used in these studies are briefly described. A summary of the important results obtained from these studies on the galactic binary X-ray sources, a few extragalactic objects and the diffuse cosmic X-ray background, is presented. The important results include detection of hard X-ray flares in Sco X-1 and Cyg X-1, 4.8 hr intensity modulation in Cyg X-3, hard X-ray pulsations in the X-ray pulsars, energy spectra of Cyg X-1, Her X-1, 3C 273 and the diffuse Cosmic X-ray background, the correlated optical and hard X-ray intensity variations and the size of the hard X-ray emitting region in the Crab Nebula. Future hard X-ray studies planned to be carried out from Hyderabad are briefly described.
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