Rapid optical variability of V4641 Sgr (=SAX J1819.3-2525)

Details Rapid optical variability of V4641 Sgr (=SAX J1819.3-2525) Rapid optical variability of V4641 Sgr (=SAX J1819.3-2525)

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003atel..174....1k&link_type=abstract

The Astronomer's Telegram, #174

Astronomy and Astrophysics

Astronomy

2

Optical, Request For Observations, Binaries, Black Holes, Transients

Scientific paper

The X-ray binary system V4641 Sgr (=SAX J1819.3-2525) was observed in Rc band with the 1.5-m Russian-Turkish telescope RTT150 at Bakyrlytepe during the period 19:01-22:16 UT, Aug. 6, 2003. The Rc magnitude of the source averaged over all observations was m_Rc~11.7. Time resolution of the photometric data is 9.7 sec. The observed light curve demonstrates strong aperiodic variability at all time scales, from tens of seconds to hours.

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