Recent optical activity of V4641 Sgr

Details Recent optical activity of V4641 Sgr Recent optical activity of V4641 Sgr

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1797....1a&link_type=abstract

The Astronomer's Telegram, #1797

Astronomy and Astrophysics

Astronomy

Optical, Binaries, Black Holes, Transients

Scientific paper

Optical observations were performed by the "KANATA" 1.5-m telescope at Higashi-Hiroshima Observatory. Our preliminary analysis shows the object was V=13.4 on Oct. 14, 13.7 on Oct. 15, and 13.5 on Oct. 16. It has remained in a slightly active phase in which the V-band flux was 0.1-0.2 mag brighter than its quiescent level (the quiescent state was dominated by the ellipsoidal modulations of the seconary star).

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