Optical Outburst of V4641 (=SAX J1819.3-2525)

Details Optical Outburst of V4641 (=SAX J1819.3-2525) Optical Outburst of V4641 (=SAX J1819.3-2525)

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003atel..170....1b&link_type=abstract

The Astronomer's Telegram, #170

Astronomy and Astrophysics

Astronomy

4

Optical, Binaries, Black Holes, Transients

Scientific paper

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.

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