Further simultaneous hard X-ray and optical observations of Sco X-1

A positive correlation between the optical luminosity and the intensity of hard X rays at the optically enhanced phase of Sco X-1 was noticed in observations made during 1971. During a balloon flight on Apr. 16, 1972, an X-ray enhancement was observed simultaneously with an optical flare. Hard X-ray...

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Bibliographic Details
Published in:Nature (London) 1974-07, Vol.250 (5461), p.38-40
Main Authors: MATSUOKA, M, MIYAMOTO, S, NISHIMURA, J, ODA, M, OGAWARA, Y, OHTSUKA, Y, HAYAKAWA, S, KASAHARA, I, MAKINO, F, TANAKA, Y, AGRAWAL, P. C, SREEKANTAN, B. V, MANABE, R, MIKAMI, Y, LOKANADHAM, B, RAO, C. RAGHAVENDER, RAO, S. SREEDHAR, SWAMINATHAN, R
Format: Article
Language:English
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Summary:A positive correlation between the optical luminosity and the intensity of hard X rays at the optically enhanced phase of Sco X-1 was noticed in observations made during 1971. During a balloon flight on Apr. 16, 1972, an X-ray enhancement was observed simultaneously with an optical flare. Hard X-ray spectra at several different B magnitudes as a basis for the study of the correlation between X-ray and optical emissions were obtained in another balloon flight on Apr. 19, 1972.
ISSN:0028-0836
1476-4687
DOI:10.1038/250038a0