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Peculiar outbursts of a black hole X-ray transient, V4641 Sgr

Published online by Cambridge University Press:  01 August 2006

M. Uemura ,
T. Kato ,
D. Nogami ,
A. Imada  and
R. Ishioka
M. Uemura
Affiliation:
Astrophysical Science Center, Hiroshima Univ., Kagamiyama, Higashi-Hiroshima, Japanuemuram@hiroshima-u.ac.jp
T. Kato
Affiliation:
Department of Astronomy, Kyoto University, Kitashirakawa, Kyoto, Japan
D. Nogami
Affiliation:
Department of Astronomy, Kyoto University, Kitashirakawa, Kyoto, Japan
A. Imada
Affiliation:
Department of Astronomy, Kyoto University, Kitashirakawa, Kyoto, Japan
R. Ishioka
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Japan
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Abstract

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We have kept optical monitoring of a peculiar black hole X-ray binary, V4641 Sgr. Based on our observations, we show that its unprecedented activity can be divided into 5 phases. In this paper, we report their observational properties.

Keywords

Accretionaccretion disks – black hole physics – binaries: close – stars: individual (V4641 Sgr)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 465 - 466
Copyright
Copyright © International Astronomical Union 2007

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