COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Number 1449 Konkoly Observatory Budapest 1978 July 27 PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES The following Table gives photoelectric minima obtained during the year 1977 at the Ege University Observatory, Izmir (Turkey) and the Nurnberg Observatory (Germany). Minima of eclipsing binaries observed at both observatories 1960-1976 were published in Astr. Nachr. 288, 69 (1964); 289, 191 (1966); 291, 111. (1968); IBVS 456 (1970), 530 (1971), 647 (1972), 937 (1974), 1053 (1975), 1163 (1976) and 1358 (1977). The Table gives the heliocentric minima, two different O-C's, the number of measurements, the type of filter, UBV or by (intermediate band photometry of Stromgren), the abbreviations of the names of the observers and the type of the instruments used (Izmir: 48 cm Cassegrain, Nurnberg: 39 cm Cassegrain, both with phototube 1P21). Abbreviations of the observers' names: Ad = A. Durgut Kt = M. Kurutac Be = G. Besold Me = T. Mertelmeier Bl = A. Blenner Nc = N. Damla Bo = G. Bode Rd = E. Roderer Eb = J. Ebersberger Si = B. Schieweck Er = A.Y. Ertan Sn = S. Evren Es = E. Hamzaoglu Sr = C. Sezer Gr = R. Grobel Tm = O. Tumer He = W. Hetterich Tn = Z. Tunca Ib = C. Ibanoglu Remarks: O-C (I) : GCVS, Moscow 1969/70 or First or Second or Third Supplement to the Third Edition of the GCVS. Moscow. 1971, 1974 and 1976 O-C (II): SAC 49, Krakow 1977 The (O-C)'s for secondary minima (Min II) were calculated on the supposition that they are symmetric between primary minima (if no special data are given). m: only the elements I or the elements II give secondary minimum. The sign = between O-C (I) and O-C (II) indicates that the elements (I) and (II) are equal. Star Min.hel. O-C(I) O-C(II) n Filt. Obs. Instr. Rem. 2443 RT And 381.5065 -0.0140 -0.0170 18 - Gr 34 AB And 481.4057 +0.0039 +0.0040 28 V Gr " Min II OO Aql 370.4473 +0.0008 +0.0139(m) 35 V Gr " RX Ari 398.4376 +0.0040 16 b Tm 48 WW Aur 477.3949 -0.0004 -0.0033 18 V Bo/Eb 34 BF Aur 389.5005 +0.0069 -0.0019 14 b Tm 48 389.5026 +0.0090 +0.0002 15 y Tm " 408.4991 +0.0069 -0.0019 29 b Tm " TV Cas 442.3897 -0.0150 -0.0170 11 b,y Sr/Tm/Nc " DO Cas 908.3972 -0.0042 +0.0012 32 b Tm/Sn " 425.5198 -0.0033 +0.0021 24 V Tm " 425.5755 -0.0026 +0.0028 24 b " 501.5126 -0.0035 +0.0020 62 B,V Tm/Sn " 502.1960 -0.0048 +0.0007 26 V Tm/Kt/Es " 502.1967 -0.0041 +0.0019 26 B Tm/Kt/Es " VW Cep 312.4522 -0.0085 +0.0010 18 V Gr/Si 34 378.4148 -0.0068 +0.0032 20 Y Tm/Es/Si 48 EG Cep 288.5002 +0.0016 +0.0129 24 V Bo/Eb/Gr 34 Min II 836 Cyg 393.4388 +0.0033 +0.0018 35 B Gr " Min II AI Dra 242.4739 +0.0042= +0.0042 25 B Er/Tn/Tm/Sn 48 242.4749 +0.0032= +0.0032 25 V Er/Tn/Tm/Sn " 386.3335 -0.0025= -0.0025 26 y Er/Tm/Sn " HS Dra 291.4469 -0.0008 +0.0053 25 V Be/Eb/Rd 34 333.4971 -0.0008 +0.0055 12 V Gr/Eb " Min II YY Eri 398.5500 -0.0098 +0.0034 12 b Tm 48 Min II AK Her 266.3964 -0.0043= -0.0093 14 B Er/Sn " 266.3971 -0.0036= -0.0036 14 V Er/Sn " DI Her 296.4789 +0.0079 +0.0062 26 V Eb/He 34 Min II SW Lac 398.4899 -0.0265= -0.0265 22 V Gr " CM Lac 368.9957 +0.0004= +0.0004 16 V Gr " 389.3542 -0.0020= -0.0020 43 y Tm 48 UV Leo 266.3058 -0.0069 +0.0055 18 B Er/Sn " Min II 266.3065 -0.0062 +0.0062 18 V Er/Sn " Min II AM Leo 218.3973 -0.0031 -0.0123 19 V Bo/Eb . 34 502 Oph 238.525 -0.004 +0.001 25 B Er/Tm/Sn 48 238.524 -0.005 +0.000 25 V Er/Tm/Sn " 292.4761 -0.0069 -0.0013 23 V He/He/Rd 34 566 Oph 281.5037 +0.0355 +0.0141 24 V Bl/Gr/Si " IZ Per 386.4696 +0.0193 +0.0193 35 y Er/Tm/Nc 48 beta Per 442.2895 +0.0002 -0.0070 25 B Sr/Tm/Nc " HU Tau 900.5010 -0.0081 +0.0070 17 b,y Tm/Ad " Min II 471 Tau 460.4160 -0.0010 18 B Ib " 462.5008 -0.0010 13 B Kt " 463.5432 -0.0010 48 B Kt " W UMa 250.4456 +0.0039 -0.0076 20 V Me/Si 34 273.2998 +0.0040 -0.0076 11 B,V Er/Sn 48 Min II 499.3410 +0.0061 -0.0064 73 V Be/Eb 34 W UMi 392.4936 -0.0250 -0.0278 21 b Tm/Sn 48 DR Vul 268.5528 +0.0509 +0.0483 29 B Tn/Tm " Min II 268.5535 +0.0516 +0.0490 24 V Tn/Tm " Min II J. EBERSBERGER, E. POHL A. KIZILIRMAK Nurnberg Observatory. Ege University Observatory Regiomontanusweg 1, Bornova/Izmir P.K.21, Turkey 85 Nurnberg, F.R.G.