DOI: 10.1093/pasj/33.1.205 ISSN: 2053-051X

An X-ray Transient in the Vela X-1 Region

Hiroshi Tsunemi, Sigenori Miyamoto, Koujun Yamashita, Hajime Inoue, Katsuji Koyama, Kazuo Makishima, Masaru Matsuoka, Toshio Murakami, Minoru Oda, Yoshiaki Ogawara, Takaya Ohashi, Noriaki Shibazaki, Yasuo Tanaka, Ichiro Kondo, Satio Hayakawa, Hideyo Kunieda, Fumiyoshi Makino, Kuniaki Masai, Fumiaki Nagase, Yuzuru Tawara

Abstract

An X-ray transient was observed by the Japanese satellite “Hakucho” from the region of Vela X-1 (4U 0900–40), possibly Vela X-1 itself. It occurred around July 26.0 (UT), 1979 and lasted for more than 1500 s. Its peak intensity was almost equal to that of the Crab Nebula.

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