COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 639 Konkoly Observatory Budapest 1972 March 14 NOTES ON FOUR VARIABLES V 379 Cas. Strohmeier discovered this variable (=BV 223) and supposed that it is an eclipsing variable between 9.20m and 10.15m phg. (Kleine Veroff, Remeis-Sternwarte Bamberg Nr. 24. 1958.) According to Nikulina the star is an irregular variable. (Astr. Cirk. No. 207. 16. 1959). I examined this star on our sky patrol plates (n=120, JD 2436985 - 40483) and on 62 short-exposure photos (1971 July 26, July 27, Oct. 24, Oct. 26) and confirmed the irregular light variability. V 379 Cas probably belongs to the type Iab. ET Hya. Hoffmeister, who discovered the variable, found short-periodic light variations (Astr. Nachr. 242. 131. 1931). Preliminary elements were given by (Tsesevich Astr. Cirk. 32. 1944 ): Max.hel. = J.D. 2431164.14+0.408d. E (RR) A light curve is not yet published. I examined the star on 387 sky patrol plates of Sonneberg Observatory (JD 35786 - 40531) and confirmed the RR Lyr-type. 22 maxima were obtained and yielded the preliminary elements: Max.hel. = J.D. 2435921.386+0.685519d. E RRab, 10.9m - 12.00m phg, M-m=0.12p Observed maxima: J.D.hel.24... Epoch O-C J.D.hel.24... Epoch O-C 35860.390 - 89 +0.015d 38753.356 + 4277 +0.005d 5875.469 - 67 + .013 9055.585 4572 + .006 5899.404 - 32 - .045 9057.667 4575 + .032 5921.381 0 - .005 9070.647 4594 - .013 7375.351 + 2121 - .021 9180.381 4754 + .038 7651.626 2524 - .010 9500.493 5221 + .012 8318.626 3497 - .020 9592.378 5355 + .038 8388.565 3599 - .004 9945.381 5870 - .002 8406.415 3625 + .023 40149.659 6168 - .008 8410.500 3631 - .005 0204.491 6248 - .018 8739.552 4111 - .003 0513.660 6699 - .018 EU Hya = 71.1931 = P 566 = BD -6deg2694 is an eclipsing binary, discovered by Hoffmeister (Astr. Nachr. 242. 131. 1931). Elements were published by Kordylewski (Roczn. astr. Obs. Krakov 18. 1947 and 24. 1953). Further observations were obtained by Kordylewski (Roczn. astr. Obs. Krakov 29.1958; IBVS Nr. 46) Diethelm and Locher (Orion 14. 112. 81; 113. 109. 1969). From 474 observations on Sonneberg sky patrol plates (JD 2435787 - 40531) I obtained 12 minima and the improved elements: Min.hel. = J.D. 2438359.786+0.778212d. E EA, 10.5m - 10.80m/10.25m phg, D=0.14p Observed minima: J.D. hel. 24... Epoch O-C Obs. 30470.310 -10138 +0.037 K 34126.336 5440 + .023 K 35862.497ph 3209 - .007 B 35876.525ph 3191 + .013 K 37403.351ph 1229 - .012 B 37669.503ph 887 - .009 B 38321.666ph 49 + .012 B 38449.285v + 115 + .005 K 38473.383ph 146 - .022 B 38852.398ph 633 - .006 39507.640ph + 1475 - .009 B 39536.458ph 1512 + .015 B 39915.424ph 1999 - .008 B 40290.514v 2481 - .016 D 40319.313v 2518 - .011 D .322v 2518 - .002 L .343ph 2518 + .019 B 40322.412v 2522 - .025 L .426v 2522 - .011 D 40326.335ph 2527 + .007 B B=Busch, D=Diethelm, K=Kordylewski, L=Locher Details will be published in "Mitteilungen der Bruno-H.-Burgel-Sternwarte Hartha, Heft 4". Bruno-H.-Burgel-Sternwarte DDR H. BUSCH EX Vul = GR 34 was discovered by Romano. It is an eclipsing binary (11.3m - 14.0m phg). The elements given by the discoverer (Coelum Vol. XXVI. 11-12. 1958) are: Min. = J.D. 2436096.34+8.0684d E Elements and light curve are not yet published. I examined this star on 342 plates of Sonneberg Observatory (JD 2427543 - 40477). It turned out that the period should be doubled. The improved elements are: Min. = J.D. 2427931.768+16.135211d. E EA, 11.59m - 14.20m phg, D=0.10p; d=0.03p Observed minima: J.D. hel. 24... Epoch O-C 27931.528 0 -0.240d 28286.580 22 - .172 432.401 31 + .442 29109.425 73 - .210 30545.439 162 - .233 33095.465 320 + .430 36725.454 545 - .003 36757.513 547 - .215 37871.455 616 + .397 38226.425 638 + .392 258.412 640 + .109 290.391 642 - .182 323.290 644 + .466 371.244 647 - .006 Details will be published in "Mitteilungen der Bruno-H.-Burgel-Sternwarte Hartha, Heft 4". Bruno-H.-Burgel-Sternwarte Hartha DDR K. HAUSSLER