Discovery of a 437.5-s X-ray pulsation from 4U 1907 + 09
著者
和文:
Makishima, K.,
河合 誠之,
Koyama, K.,
Shibazaki, N.,
Nagase, F.,
Nakagawa, M..
英文:
Makishima, K.,
Kawai, N.,
Koyama, K.,
Shibazaki, N.,
Nagase, F.,
Nakagawa, M..
言語
English
掲載誌/書名
和文:
英文:
Publications of the Astronomical Society of Japan
巻, 号, ページ
Vol. 36
pp. 679-689
出版年月
1984年
出版者
和文:
英文:
会議名称
和文:
英文:
開催地
和文:
英文:
アブストラクト
Observation of an X-ray pulsation with a period of 437.5 seconds from the X-ray source 4U 1907 + 09 is reported. The observations were carried out using the gas scintillation proportional counter (GSPC) array of the Tenma X-ray astronomy satellite. Analysis of the pulse-arrival time showed that the 8.38-d periodic X-ray modulation observed by Ariel 5 in 4U 1907 + 09 can be regarded as a binary period. An X-ray mass function f(M) of about 9 solar mass was derived, confirming that the optical counterpart of 4U 1907 + 09 is massive. On the basis of the observational results, it is demonstrated that 4U 1907 + 09 is an X-ray pulsar.
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