Data sources:

47/4J: BVRc photometry by N.V.Metlova, S.Yu.Shugarov A.V.Zharova and V.P.Goranskij with the SAI Crimean Station 60-cm reflector and CCD Apogee-47p. V=V(47)+0.40; B=B(47)-0.22 (-0.40); BVRjIj photometry with the same telescope and CCD.
6m: BTA/SCORPIO BVRcIc photometry. V=V(6m)+0.07.
A5 BVRcIc photometry by V.P.Goranskij with the SAI Crimea Station 50-cm meniscus Maksutov telescope using CCD Apogee Alta U8300. V=V(A5)+0.55; Ic=Ic(A5)-0.17.
A7/C7/VJ: BVRjIj photometry by V.P.Goranskij and E.A.Barsukova with the 38-cm CrAO reflector and with the SAI Crimean Station 60-cm reflector using CCDs SBIG ST-7 and Apogee VersArray.
As BVRjIj photometry by V.P.Goranskij with the 60-cm Zeiss telescope ond Apogee Aspen CCD. B = B(As)+0.74; V = V+0.24; Rc = Rc(As)+0.33; Ic = Ic(As)+0.19.
Cr/C0: L.A.Crause, IAU Circ. 8210, 2003; L.A.Crause, W.A.Lawson, D.Kilkenny, F.van Vyk, F.Marang, A.F.Jones, MNRAS V.341, 785, 2003; L.A.Crause, W.A.Lawson, J.W.Menzies, F.Marang, MNRAS V.358, 1352, 2005.
HB: H.Bond, ATel No.966, 2006 [Corrected: V=V(HB)+0.10; B=B(HB)-0.05].
HM: A.Henden, U.Munari, H.Navasardyan, IAU Circ. 8655, 2006.
KL: S.Kimeswenger, C.Lederle, C.Schmeja, B.Armsdorfer, MNRAS V.336, 43, 2002.
K+: I.Kolka, T.Liimets, E.Kankare, T.Pursimo, J.Datson, ATel 2211, 2009 [Corrected: Rc=Rc(K+)-0.25; V=V(K+)+0.05; B=B(K+)-0.15].
MD: U.Munari, S.Disedera, A.Henden, IAU Circ. 8005, 2002.
MH/Ki: U.Munari, A.Henden, S.Kiyota, D.Laney, F.Marang, T.Zwitter, R.L.M.Corradi, S.Disedera, P.M.Marrese, E.Giro, F.Boshi, M.B.Shwartz, Astron. Astrophys. V.389, L51, 2002.
MU: U.Munari, R.L.M.Corradi, A.Henden, H.Navasardyan, M.Valentini, R.Greimel, P.Leisy,T.Augusteijn, A.A.Djupvik, L.Glowienka, A.Somero, I.G. de la Rosa, A.Vazdekis, I.Kolka, T.Liimets, Astron. Astrophys. V.474, 585, 2007 [original with corrections B=B(MU); V=V(MU)+0.19; Rc=Rc(MU)+0.07; Ic=Ic(MU)+0.08].
P5 BVRcIc photometry by V.P.Goranskij with the SAI Crimea Station 50-cm meniscus Maksutov telescope using CCD V=V(A5)+0.55; I=I(A5)-0.17.
Sd: Stardeal Survey data.
SH/SK/SV: BVRcIc photometry by S.Yu.Shugarov with the 50- and 60-cm reflectors of the Stara Lesna Observatory (Slovakia) and the following CCDs: G1 telescope + CCD ST-10: V=V(SK)+0.12; Rc=Rc(SK)-0.31; Ic=Ic(SK)-0.11; G1 telescope + CCD FLI-2: V=V(SK)+0.10; Rc=Rc(SK)-0.21; Ic=Ic(SK)-0.20; G2 telescope + CCD FLI-2: B=B(SK)+0.07; V=V(SK)-0.025; Rc=Rc(SK)-0.26.
SO/it/Qu/Me/pg/PS/pz V.P.Goranskii, A.V.Kusakin, N.V.Metlova, S.Yu.Shugarov, E.A.Barsukova, N.V.Borisov, Astron. Letters V.28, 691, 2002; V.P.Goranskij, S.Yu.Shugarov, E.A.Barsukova, P.Kroll, IBVS 5511, 2004 and current observations.
VA/D7: BVRc photometry by V.P.Goranskij and E.A.Barsukova with the SAI Crimean Station 60-cm reflector and CCD Apogee VersArray.
WS: R.M.Wagner, G.Schwarz, S.Starrfield, U.Munari, E.Giro, A.Siviero, A.Henden, P.Szkody, H.Bond, IAU Circ. 8202, 2003.
Others: S. Kiyota [Ki], F.van Wyk [Wy], D.West [We], P.Corelli [Co], L.Kral, J.M.Llapasset [Ll], F.Lomoz, A.Oksanen [Ok], O.Pejcha, L.Smelcer, P.Sobotka [BR], K.Hornoch (VSNET).
St,SP,Ga,He: unidentified sources.