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Date: Mon, 4 Aug 2003 18:47:01 -0400 (EDT) From: Dipankar Maitra <maitra@astro.yale.edu> Subject: V4641 optical outburst We have just submitted the following to 'The Astronomer's Telegram' (ATEL #170): -------------------------------------------------------------------------- Subjects: Optical, Binaries, Black Holes, Transients SMARTS consortium observations of the black hole candidate V4641 Sgr with the 1.3m telescope at CTIO + ANDICAM instrument from UT 2003 Aug 4.00 indicate that the source is starting a new outburst. The B, V, and I magnitudes were 12.8, 12.6 and 12.2, which is 1.1, 1.1 and 1.1 magnitudes above the predicted quiescent value. I-band data folded on the orbital period show activity as early as UT 2003 Aug 1.95. Observations at all wavelengths are encouraged. Our recent optical data from SMARTS are posted at http://phoenix.astro.yale.edu/buxton/smarts/v4641_2003outburst.html --------------------------------------------------------------------------- Could you please post it on the VSNET ? Thanks Michelle Buxton & Dipankar Maitra
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