Literature sources:


SS: B.J. Shappee, K.Z. Stanek, J.S. Brown, T.W.-S. Holoien, C.S. Kochanek, D. Godoy-Rivera, G. Simonian, U. Basu, J. L. Prieto, D. Bersier, Subo Dong, Ping Chen, R.M. Wagner, J. Brimacombe,Astronomer's Telrgram No.8126, 2015.
A5: V.P.Goranskij with the 0.5 m meniscus Maksutov telescope of the SAI Crimean Station and Apogee Alta U8300 CCD.
Ms: Masi, Virtual Telescope; Ko:Kojima, AAVSO; Ma: Maehara, AAVSO; Hi: Hirosawa, AAVSO/