Data sources:
(systematical corrections were taken into account)

KS: S.Kristian, A.Sandage, J.A.Westphal, Apstrophys.J. V.150, L99.
pg: photographic B band observations by M.M.Basko, V.P.Goranskij, V.M.Lyuty, L.L.Ruzan, R.A.Sunyaev, S.Yu.Shugarov, Variable Stars, V.20, No.3, p.219-241, 1976.
lu: photoelectric UBV photometry by V.M.Lyuty [M.M.Basko, V.P.Goranskii, V.M.Lyuty, L.L.Ruzan, R.A.Sunyaev, S.Yu.Shugarov, Pisma v A.Zh. V.2, No.11, p.539-543, 1977 (Soviet Astron. Letters V.2, p214-216, 1976) and V.P.Goranskij, V.M.Lyuty, Astron. Zhurnal V.65, No.2, p.381-395, 1988 (Soviet Astron. V.32, No.2, p.193, 1988).
BN: G.M.Beskin, S.I.Neizvestnyi, A.A.Pimonov, V.L.Plakhotnichenko, V.F.Shvartsman, Sov. Astron. Letters, V.5, 271.
sz: photoelectric UBVRj observations by A.N.Sazonov, Astron. Zirkular (Russian) No.1531, p.15, 1988.
SO: CCD UBVRcIc photometry by V.P.Goranskij and E.A.Barsukova with SAO 1-m Zeiss telescope.
Pi: V photometry by V.P.Goranskij with CCD Meade Pictor-416 and 50-cm Maksutov telescope of SAI Crimean Station.
A4: UBVRc photometry by N.V.Metlova and V.P.Goranskij with CCD Apogee-47 and 60-cm telescope of SAI Crimean Station.
VA: UBVRc photometry by V.P.Goranskij with CCD Princeton Instruments VersArray and 60-cm telescope of SAI Crimean Station.
A5: UBVRc photometry by V.P.Goranskij with the SAI Crimean Station 50-cm Maksutov telescope and CCD Apogee Alta U8300.