Data sources:


BW: B. Wang, X. Gao, 2013, CBAT (http://www.cbat.eps.harvard.edu/unconf/followups/J13100734+3410514.html)
E: L.Elenin, CBAT.
LB: E. Luppi, L. Bussi, CBAT.
Br: J. Brimacombe (http://spacefinalfrontier.blogspot.ru/2014/02/luminous-blue-variable-psn.html)
6m: BVRc photometry by E.A. Barsukova, S.S. Kaisin, V.F. Vallev, and V.P. Goranskij with the Russian 6-m BTA telescope and SCORPIO camera.
SO: BVRc photometry by E.A. Barsukova and V.P. Goranskij with the SAO 1-m Zeiss telescope.