COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2385 Konkoly Observatory Budapest 18 August 1983 HU ISSN 0374-0676 PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES The following Table gives photoelectric minima, mostly obtained during the year 1982 at the Ege University Observatory, Izmir (Turkey) and the Nurnberg Observatory (Germany). Minima of eclipsing binaries observed at both observatories 1960 - 1981 were published in Astr. Nachr. 288, 69 (1964); 289, 191 (1966); 291, 111 (1968); I.B.V.S. No. 456 (1970), 530 (1971), 647 (1972), 937 (1974), 1053 (1975), 1163 (1976), 1358 (1977), 1449 (1978), 1924 (1981) and 2189 (1982). The Table gives the heliocentric minima, three 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: Bu = A. Buchler Ml = M. Hamzaoglu Bz = S. Bozkurt Sn = S. Evren Er = A.Y. Ertan Sr = C. Sezer Es = E. Hamzaoglu Tj = T. Eker Gd = N. Gudur Tm = 0. Tumer Gl = Gulmen Tn = Z. Tunca Gr = R. Grobel Va = V. Keskin Ib = C. Ibanoglu Wo = G. Wolfschmidt Ma = D. Matschat 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 54, Krakow 1982 O-C (III): IM Aur 2438 327.7922+ 1.2472 906d*E (N. Gudur, O. Gulmen, C. Sezer, I.B.V.S. No. 2098, 1982) NN Cep 2444 507.4033+ 2.058305d*E (N. Gudur, O. Gulmen, I.B.V.S. No. 1881, 1980). Table ----------------------------------------------------------------------------- Star Min.hel. O-C (I) O-C (II) O-C (III) Filt. Obs. Instr. Rem. 244 ----------------------------------------------------------------------------- AB And 5230.4774 +0.0040d -0.0054d V Bu/Gr 34 MinII CN And 5274.330: -0.012: V Gr 34 MinII " " 5294.4598: -0.0139: V Gr 34 OO Aql 5180.445: +0.003: -0.006: V Bu/Gr 34 MinII SS Ari 5323.296: -0.083: -0.004: V Bu/Gr 34 IM Aur 4569.236 -0.023 = -0.023 +0.002 B, V Sn/Sr 48 " " 4893.5270 -0.0285= -0.0285 -0.0027 B, V Gd/Tj 48 " " 4931.5674 -0.0306= -0.0306 -0.0046 B, V Gd/Va 48 MinII " " 5018.2548 -0.0303= -0.0303 -0.0042 B, V Gd/Sr 48 " " 5261.4702 -0.0376= -0.0376 -0.0104 B, V Gd/Sr 48 AS Cam 5002.514 -0.213 = -0.213 V Wo 34 MinII RZ Cas 5123.4583 -0.0092 -0.0070 V Gr/Wo 34 DO Cas 5186.4744 -0.0073 -0.0016 V Gr 34 " " 5306.2903: -0.0082: -0.0022: V Gr 34 MN Cas 5280.4612 -0.0027 +0.0072 V Bu/Gr 34 1) ZZ Cep 5223.493: +0.007: +0.007: V Bu/Ma 34 CQ Cep 5143.4817 -0.0179= -0.0179 B Sn/Tm 48 " " 5143.4810 -0.0186= -0.0186 V Sn/Tm 48 EG Cep 5194.4118 +0.0123 +0.0056 V Bu/Gr 34 NN Cep 4893.336 +0.001 B, V Gd/Tj 48 MinII KR Cyg 5130.4907 +0.0015= +0.0015 V Bu/Gr 34 V478 Cyg 4878.3065 +0.0765 +0.0008 Sr/Tm/Va 48 V836 Cyg 4874.3997 +0.0084 +0.0072 +0.0002 B Bz/Sn 48 " " 4874.4001 +0.0088 +0.0076 +0.0006 V Bz/Sn 48 " " 4879.3013 +0.0094 +0.0082 +0.0012 B, V Bz/Va 48 MinII " " 4894.3340 +0.0136 +0.0125 +0.0054 B Bz/Sn 48 MinII " " 4894.3305 +0.0101 +0.0090 +0.0019 V Bz/Sn 48 MinII " " 4895.3097 +0.0092 +0.0080 +0.0010 B Bz/Tm 48 " " 4895.3076 +0.0071 +0.0059 -0.0011 V Bz/Tm 48 " " 4929.2879 +0.0101 +0.0089 +0.0018 B Bz/Sn 48 " " 4929.2875 +0.0097 +0.0085 +0.0014 V Bz/Sn 48 V909 Cyg 5178.5261 +0.0239 -0.0009 B, V Gl 48 MinII " " 5192.555 +0.026 +0.001 B, V Sr 48 MinII " " 5195.3592 +0.0245 -0.0003 B, V Sr 48 MinII " " 5202.3736 +0.0253 +0.0005 B, V Gd/Sr 48 " " 5216.4002 +0.0248 0.0000 B, V Gd 48 " " 5230.4288 +0.0264 +0.0015 B, V Sr 48 " " 5261.2870 +0.0250 0.0000 B, V Gd/Sr 48 DM Del 5194.4394 +0.0490 -0.0063 B, V Gl 48 MinII " " 5219.3558 +0.0476 -0.0078 B, V Gl/Tj 48 BS Dra 5121.4700 -0.0003= -0.0003 V Bu/Gr 34 AK Her 5002.6546 +0.0003= +0.0003 V Wo 34 HS Her 5160.432 -0.011 = -0.011 V Bu/Gr 34 SW Lac 5160.5296 -0.0208 +0.0014 V Bu/Gr 34 " " 5192.4399 -0.0221 +0.0002 V Bu/Gr 34 MinII " " 5193.4020 -0.0222 +0.0001 V Bu 34 MinII RT Lac 5223.4661 -0.0384 -0.0352 -0.0011 B Ib/Tm 48 " " 5223.4654 -0.0391 -0.0359 -0.0018 V Ib/Tm 48 " " 5228.5404 -0.0382 -0.0349 -0.0007 B Ib/Tn 48 RT Lac 5228.5384 -0.0402 -0.0369 -0.0027 V Ib/Tn 48 " " 5284.3532 -0.0395 -0.0363 -0.0013 B Er/Ib 48 " " 5284.3529 -0.0398 -0.0366 -0.0016 V Er/Ib 48 " " 5312.2595 -0.0403 -0.0371 -0.0017 B Sn/Tm 48 MinII " " 5312.2610 -0.0388 -0.0356 -0.0002 V Sn/Tm 48 MinII AR Lac 5163.4368 -0.0325 -0.0336 -0.0041 B Er/Tm 48 " " 5163.4382 -0.0311 -0.0322 -0.0027 V Er/Tm 48 " " 5164.4372 -0.0273 -0.0248 +0.0047 B Tn 48 MinII " " 5164.4378 -0.0267 -0.0242 +0.0053 V Tn 48 MinII " " 5165.4189 -0.0336 -0.0347 -0.0052 B, V Er/Tm 48 " " 5166.4098 -0.0379 -0.0354 -0.0059 B, V Er 48 MinII " " 5296.3065 -0.0371 -0.0383 -0.0070 B, V Tm/Tn 48 V566 Oph 5183.4926 +0.0621 +0.0000 V Bu/Gr 34 DI Peg 5196.4870 +0.0034= +0.0034 V Bu 34 UV Psc 5265.5228 +0.0025 -0.0028 B, V Ib/Tn 48 " " 5282.3149 +0.0041 -0.0011 B Sn/Tm 48 MinII " " 5282.3139 +0.0031 -0.0021 V Sn/Tm 48 MinII " " 5284.4666 +0.0032 -0.0020 B, V Er/Ib 48 " " 5285.3284 +0.0040 -0.0013 B, V Ib/Tm 48 V471 Tau 5284.55656 -0.00239 +0.00160 B Er/Ib 48 W UMa 4986.3624 +0.0076 -0.0024 V Es 48 " " 4986.5290 +0.0074 -0.0026 V Es 48 MinII " " 4987.3639 +0.0082 -0.0018 V Es 48 " " 5066.4356 +0.0079 -0.0023 B Es 48 " " 5066.2689 +0.0080 -0.0022 B Es 48 W UMa 5266.6173 +0.0074 -0.0035 B Es/Ml 48 " " 5267.6180 +0.0072 -0.0037 B Es/Ml 48 " " 5276.4592 +0.0071 -0.0039 B Es/Ml 48 MinII " " 5297.4788 +0.0075 -0.0035 V Es 48 MinII " " 5299.4792 +0.0061 -0.0049 V Es 48 MinII AH Vir 5022.5734 +0.0635 +0.0015 V Wo 34 Remarks: 1) MinII (GCVS), MinI (Krakow) ----------------------------------------------------------------------------- V478 Cyg 2444 777.4779 + 2.880795d*E (C. Sezer, N. Gudur, O. Gulmen, I.B.V.S. No. 2100, 1982) V836 Cyg 2444 853.4903 + 0.6534122d*E (S. Bozkurt, I.B.V.S. No. 2124, 1982) V909 Cyg 2445 202.3731 + 2.8054230d*E (O. Gulmen, N. Gudur, C. Sezer, I.B.V.S. No. 2245, 1982) RT Lac 2444 873.3648 + 5.0739496d*E - 2.7d 10^-8 E^2 (Z. Tunca, C. Ibanoglu, O. Tumer, A.Y. Ertan, S. Evren, Astrophys. Space Science, in press, 1983) AR Lac 2441 593.7123 + 1.98319204d*E - 5.24d 10^-9 E^2 (S. Evren, C. Ibanoglu, O. Tumer, Z. Tunca, A.Y. Ertan, Astrophys. Space Science, in press. 1983) V471 Tau 2440 610.06478 + 0.52118371d*E - 8.1 10^-11 E^2 (Z. Tunca, O. Tumer, M. Kurutac, C. Ibanoglu, Astrophys. Space Science 64, 421, 1979) 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). 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. E. POHL E. HAMZAOGLU, N. GUDUR, C. IBANOGLU Nurnberg Observatory Ege University Observatory Regiomontanusweg 1 Bornova/Izmir P.K. 21, 85 Nurnberg 20, F.R.G. Turkey