COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 3760 Konkoly Observatory Budapest 25 August 1992 HU ISSN 0374 - 0676 NEW PHOTOELECTRIC MINIMA OF SOME ECLIPSING BINARIES We continue our program of monitoring eclipsing binaries following our previous publication by Keskin & Pohl (1989). All minima listed in the present paper were obtained at the Nurnberg Observatory (Germany), the Ege University Observatory Izmir (Turkey) or the private Observatory of Rainer Grobel at Eckental (Germany) during the years 1989 to 1991. Minima times were determined from photoelectric measured light curves taken at the 0.34 m Cassegrain telescope at Nurnberg, the 0.20 m Newton telescope at Eckental or the 0.48 m Cassegrain telescope at Izmir. All telescopes are equipped with a 1P21 phototube. For each binary in the table we give the heliocentric times of the observed minima, O-C values, the used type of filters in the UBV system, the observers, the instrument and a remark refering to secondary minima. For comparison we calculate two different O-C values. O-C (I) refers to the elements given in the 4th edition of the General Catalogue of Variable Stars (Moscow, 1985 or 1987), O-C (II) to SAC 63 (Krakow, 1992). The following abbreviations belong to the observers: Bk = B. Kilinc Ho = H. Hofmann Sn = S. Evren Ca = C. Akan Ib = C. Ibanoglu Sr = C. Sezer Er = A. Erdem Ld = O. L. Degirmenci Tn = Z. Tunca Gl = O. Gulmen Ls = G. Lichtschlag Va = V. Keskin Gr = R. Grobel Rz = R. Rosenzweig Wk = H. Wieck Gz = H. Garzarolli Sg = S. Schurig Wu = E. Wunder Hb = H. Baysal Sk = S. Skaberna Table Star Min. hel. O-C O-C Filt. Observers Instr. Rem. JD 244... (I) (II) OO Aql 7805.3476 -.0041 -.0041 V Ls/Sk/Wu 34 8500.4081 -.0039 -.0039 V Gz/Ho/Rz/Sg 34 V346 Aql 8482.4325 -.0032 -.0029 V Wk/Wu 34 TZ Boo 7612.4617: -.0711 -.0038 B Gr 34 7613.5025: -.0705 -.0030 B Gr 34 MinII 7967.4154: -.0776 -.0037 B Gr 34 MinII 7967.5592 -.0824 -.0085 B Gr 34 8390.4092 -.0939 -.0124 B Gr 20 YY CMi 7540.4730 +.0146 +.0011 V Sk/Wu 34 VW Cep 7763.3502 -.0460 -.0011 B,V Gl/Bk 48 MinII 7763.4919 -.0435 +.0014 B,V Gl/Bk 48 7767.3850 -.0468 -.0018 V Sr/Hb 48 7767.3857 -.0461 -.0011 B Sr/Hb 48 7767.5255 -.0454 -.0005 B,V Sr/Hb 48 MinII EG Cep 8483.3901 +.0118 +.0146 B Bk/Ld 48 8a83.3904 +.0121 +.0149 V Bk/Ld 48 8489.3805 +.0113 +.0142 V Bk 48 8489.3819 +.0127 +.0156 B Bk 48 8495.3696 +.0096 +.0124 B Er/Bk 48 8495.3709 +.0109 +.0137 V Er/Bk 48 8516.3388 +.0108 +.0137 V Bk/Er 48 MinII 8516.3395 +.0115 +.0144 B Bk/Er 48 MinII 8523.4174 +.0093 +.0122 B Ld/Bk 48 MinII 8523.4181 +.0100 +.0129 V Ld/Bk 48 MinII V1073 Cyg 7748.4413 -.0340 -.0055 B,V Sr/Bk 48 8115.4316 -.0402 -.0095 B,V Bk/Er 48 8482.4268 -.0414 -.0086 B,V Sr/Bk/Ld 48 RT Lac 8072.4453 -.0447 -.0068 D Tn/Sn 48 MinII 8072.4470 -.0430 -.0051 V Tn/Sn 48 MinII 8105.4321 -.0386 +-.0000 V Sn/Va 48 8105.4322 -.0385 +.0001 B Sn/Va 48 8110.5059 -.0387 -.0001 V Sn/Va/Bk 48 8110.5076 -.0370 +.0016 B Sn/Va/Bk 48 8166.3147 -.0434 -.0036 B Tn/Ca 48 8166.3185 -.0396 +.0002 V Tn/Ca 48 8171.3916 -.0404 -.0005 B Ib/Tn/Sn 48 8171.3974 -.0346 +.0053 V Ib/Tn/Sn 48 8450.4529 -.0464 -.0007 B Tn 48 8450.4552 -.0441 +.0016 V Tn 48 8483.4239 -.0560 -.0097 B,V Tn/Sn 48 MinII 8544.3165 -.0508 -.0032 B Ca/Va 48 MinII 8544.3186 -.0487 -.0011 V Ca/Va 48 MinII SW Lac 7770.3841 -.0118 -.0052 V Ls/Sk 34 MinII XY Leo 7609.3629 +.0177 -.0015 V Wk/Wu 34 MinII 7613.3416 +.0191 -.0026 B Wu 34 MinII 7626.4092 +.0182 -.0014 V Wu 34 MinII 7648.4285 +.0200 -.0001 V Wu 34 7928.4124 +.0264 -.0002 V Ls/Sk/Wu 34 MinII XZ Leo 7609.3834 +.0048 -.0011 V Wk/Wu 34 FT Ori 7605.4121 +.0041 +.0041 V Ls/Wk/Wu 34 UV Psc 8531.4753 -.0061 -.0061 B Sn/Ca 48 8531.4758 -.0056 -.0056 V Sn/Ca 48 8541.3767 -.0067 -.0067 V Ca 48 MinII 8541.3773 -.0061 -.0061 B Ca 48 MinII 8594.3322 -.0057 -.0057 V Tn/Sn/Ca 48 8594.3333 -.0046 -.0046 B Tn/Sn/Ca 48 GR Tau 7821.4944 -.0080 -.0005 V Wu 34 V471 Tau 7837.31165 +.00073 B Tn/Ca 48 7924.34936 +.00088 B Sn/Ca 48 7959.26854 +.00080 B Ib/Tn 48 7971.25601 +.00106 B Ib/Tn 48 8183.37754 +.00110 B Ca 48 8184.41982 +.00102 B Ib 48 V781 Tau 8268.2285 -.0166 B,V Va 48 MinII 8268.3996 -.0180 B Va 48 8268.4024 -.0152 V Va 48 8607.2723 -.0194 V Tn/Va 48 MinII 8607.2734 -.0183 B Tn/Va 48 MinII 8607.4447 -.0194 B Tn/Va 48 8607.4460 -.0221 V Tn/Va 48 W UMa 7597.3982 -.0101 -.0101 V Ls/Wk/Wu 34 ER Vul 8505.2949 +.0060 -.0048 V Sn/Va 48 MinII 8505.2965 +.0076 -.0032 B Sn/Va 48 MinII 8512.2743 +.0045 -.0063 B,V Ib/Ca 48 MinII 8513.3218 +.0048 -.0060 V Tn/Sn 48 8513.3261 +.0091 -.0017 B Tn/Sn 48 8526.2402 +.0085 -.0023 B Ib/Ca 48 MinII 8526.2404 +.0087 -.0021 V Ib/Ca 48 MinII 8527.2854 +.0065 -.0043 B,V Sn/Va 48 8528.3362 +.0102 -.0006 B Ib/Tn 48 MinII 8528.3368 +.0108 +/-.0000 V Ib/Tn 48 MinII E. WUNDER, M. WIECK Nurnberg Observatory Regiomontanusweg 1 8500 Nurnberg 20, F.R.G. B. KILINC, O. GULMEN, Z. TUNCA, S. EVREN Ege University Observatory Bornova/Izmir Turkey Reference: Keskin, V., Pohl, E., 1989, Inform. Bull. on Var. Stars 3355.