COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 1358 Konkoly Observatory Budapest 1977 October 27 PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES The following Table gives photoelectric minima obtained during the year 1976 at the Ege University Observatory, Izmir (Turkey) and the Nurnberg Observatory (Germany). Minima of eclipsing binaries observed at both observatories 1960-1975 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) and 1163 (1976). The Table gives the heliocentric minima, two different O-C's, the type of filter (UBV), the abbreviations of the names of the observers and the type of the instruments used (Izmir: 48 cm Cassegrain, Nurnberg: 34 cm Cassegrain, both with phototube 1P21). Abbreviations of the observers' names: Ad = A. Durgut He = W. Hetterich Ar = G. Arneth Ka = H. Kastner Be = G. Besold Me = T. Mertelmeier Bl= A. Blenner Rd = E. Roderer Bo = G. Bode Sb = R. Sendelbeck Eb = J. Ebersberger Si = B. Schieweck Ek = S. Ertukel Sr = C. Sezer Er = A.Y. Ertan We = Th. Weber Gr = R. Grobel 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 48, Krakow 1976 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. The sign : means that the time of minimum (last decimal) is uncertain. Star Min.hel. O-C (I) O-C (II) Filt. Obs. Instr. Rem. 2442 - 2443 AB And 962.492 +0.004 = +0.0004 V He/Si 34 BX And 012.4755 +0.0021 = +0.0021 V Ka/Me " KP Aql 989.447 -0.003 -0.01 Ka/Me/Si " OO Aql 960.4541: -0.0003: +0.0112: (m) Gr/Si " BF Aur 808.4555: +0.0030: -0.0062: Eb/Gr/Si " 139.350 : +0.005: -0.004: Eb/Si " i Boo 828.4615: -0.0009: +0.0131: Eb " 841.585 0.000 +0.014 Bl/Eb/Gr " 849.354 +0.002 +0.016 Bl/Bo/Gr " 849.486 0.000: +0.014: Bl/Bo/Gr " MinII 869.4358: -0.0024: -0.0120: V Eb/Bl " 869.4371: -0.0011: +0.0133: B " " 869.5685: -0.0036: +0.0108: V " " MinII 869.5675: -0.0046: +0.0098: B " " " 886.442 -0.003 +0.012 V Bl/Si " 886.442 -0.003 +0.012 B " 886.578 0.000 +0.014 V Bl/Si " 937.462 -0.002 +0.014 Eb/Si " SV Cam 138.461 -0.009 -0.004 Ka/Si " VZ CVn 889.435: +0.001: Bl/Gr/He " RZ Cas 907.4718 -0.0024 -0.0090 Bl/Eb/Si " 078.3906 -0.0044 -0.0112 Bo/We " TV Cas 016.424 -0.021 -0.019 Me/Si " U Cep 806.4320 -0.0096 +0.0018 Eb/He " 963.4980 -0.0079 +0.0044 He/Me/Si " VW Cep 787.4140 -0.0034 +0.0022 B Ek/Sr 48 MinII 787.4126 -0.0048 +0.0008 V " " " 888.4409: -0.0052: +0.0011: Be/Gr/Si 34 " 913.4887: -0.0058: +0.0007: V Gr/He/Si " 050.4218 -0.0043 +0.0032 B,V Ad/Sr 48 " XX Cep 063.4348 +0.0071 +0.0134 Eb/Me 34 EG Cep 961.4578 +0.0040 +0.0150 V Eb/Si " MR Cyg 955.497 -0.002 0.000 Gr/Si " MY Cyg 013.4850: +0.0094:= +0.0094: V Bl/Gr " 477 Cyg 053.3216 +0.0075 = +0.0075 B,V Ad/Er 48 548 Cyg 927.460 0.000 -0.012 Bl/Si 34 Star Min.hel. O-C (I) O-C (II) Filt. Obs. Instr. Rem. 242-2443 1034 Cyg 938.459 +0.026 -0.006 Bl/Eb/Si 34 TW Dra 898.4621: +0.0013:= +0.0013: Bl/Bo/Sb " TZ Dra 966.482 +0.003 +0.011 V Eb/Gr " AI Dra 880.4335 -0.0025= -0.0025 Eb/Si " TX Her 939.4743 -0.0041 +0.0055 Bl/Eb/Si " AK Her 914.4284: -0.0005:= -0.0005: Ar/He/Si " HS Her 956.448 -0.004 Eb/He/Si " UV Leo 838.4473 -0.0047 +0.0072 Eb/He/Rd " XY Leo 841.4395: -0.014:= -0.014: Eb/Gr " Min II XZ Leo 866.395: +0.024: +0.024: Eb/We " AM Leo 815.4721 -0.0026 -0.0097 Eb/Si " Min II DI Peg 015.4802 -0.0019 -0.0134 Eb/Si " W UMa 815.378 -0.001 -0.011 Eb/He/Si " TX UMa 829.3771 -0.0023 -0.0021 He/Si " VV UMa 842.427 +0.007= +0.007 Bo/We " AH Vir 858.4003 +0.0354 +0.0341 Eb/Rd " Min II Z Vul 947.4777 -0.0038 +0.0129 V Bo/He " E. POHL A. KIZILIRMAK Nurnberg Observatory Ege University Observatory Regiomontanusweg 1, Bornova/Izmir P.K. 21, Turkey 85 Nurnberg, F.R.G.