Time variations of hard X-rays from Sco X-1 |
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| Authors: | M Matsuoka M Fujii S Miyamoto J Nishimura M Oda Y Ogawara S Hayakawa I Kasahara F Makino Y Tanaka P C Agrawal B V Sreekantan |
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| Institution: | (1) Institute of Space and Aeronautical Science, University of Tokyo, Tokyo, Japan;(2) Dept. of Physics, Nagoya University, Nagoya, Japan;(3) Tata Institute of Fundamental Research, Bombay, India |
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| Abstract: | Simultaneous hard X-ray and optical observations of Sco X-1 were carried out on 1971 May 1 at Hyderabad, India, when Sco X-1 was optically bright. The X-ray intensity observed by balloon-borne counter telescopes increased in coincidence with optical enhancements, while the plasma temperature derived by fitting the X-ray spectrum in the energy range 20–40 keV to the thermal bremsstrahlung spectrum did not appreciably change over the whole period of observation. |
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