V4641 Sgr references For further reading: Stubbings, R. and Pearce, A. (1999) IAUC 7253 Ayani, K. (1999) IAUC 7254, optical spectroscopy in outburst Kato, T. et al. (1999) IBVS 4777 "Preoutburst Activity of V4641 Sgr = SAX J1819.3-2525: Possible Existence of 2.5-Day Period" in't Zand et al. (2000) A&A 357, 520 "BeppoSAX observations of the nearby low-mass X-ray binary and fast transient SAX J1819.3-2525" Wijnands, R. and van der Klis, M. (2000) "The Rapid X-Ray Variability of V4641 Sagittarii (SAX J1819.3-2525 = XTE J1819-254)" Hjellming, R. M. et al. (2000) ApJ 544, 977 "Light Curves and Radio Structure of the 1999 September Transient Event in V4641 Sagittarii (=XTE J1819-254=SAX J1819.3-2525)", Marti, J. et al. (2001) IBVS 5036 "V-band Observations of V4641 Sagittarii" Goranskij, V. P. (2001) IBVS 5068 "The Orbital V-band Light Curve of V4641 Sagittarii" Orosz, J. A. et al. (2001) ApJ 555, 489 "A Black Hole in the Superluminal Source SAX J1819.3-2525 (V4641 Sgr)" Uemura, M. et al. (2002) PASJ 54, 95 "The 1999 Optical Outburst of the Fast X-Ray Nova, V4641 Sagittarii" Revnivtsev, M. et al. (2002) A&A 385, 904 "V4641 Sgr - A super-Eddington source enshrouded by an extended envelope"