V-band observations of V4641 Sagittarii

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Title:	V-band observations of V4641 Sagittarii
Author:	Martí Ribas, Josep; Zamanov, R. K.; Paredes i Poy, Josep Maria; Ribó Gomis, Marc
Other authors:	Universitat de Barcelona
Abstract:	In this note we report high time resolution V Johnson photometry of the microquasar V4641 Sgr (SAX J1819.3-2525 - XTE J1819-254). This source was discovered as an X-ray transient by BeppoSAX and RossiXTE satellites (In't Zand et al. 1999; Markwardt et al. 1999). On 1999 September, a very fast transient optical and X-ray outburst was observed, reaching up to ...
Subject(s):	-Fotometria astronòmica -Forats negres (Astronomia) -Espectroscòpia -Quàsars -Estels -Raigs X -Astrometria -Astronomical photometry -Black holes (Astronomy) -Spectrum analysis -Quasars -Stars -X-rays -Astrometry
Rights:	(c) Martí Ribas, Josep et al., 2001
Document type:	Article Article - Published version
Published by:	Konkoly Observatory
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