COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 2401 - 2500 1983 September - 1984 March EDITORS: B. SZEIDL AND L. SZABADOS, KONKOLY OBSERVATORY 1525 BUDAPEST, Box 67, HUNGARY HU ISSN 0374-0676 CONTENTS 2401 A POSSIBLE CATACLYSMIC VARIABLE IN CANCER Masaaki Huruhata 20 September 1983 2402 A NEW RR-TYPE VARIABLE IN LEO Masaaki Huruhata 20 September 1983 2403 ON THE DELTA SCUTI STAR BD +43d1894 A. Yamasaki, A. Okazaki, M. Kitamura 23 September 1983 2404 IQ Vel: IMPROVED LIGHT-CURVE PARAMETERS L. Kohoutek 26 September 1983 2405 FLARE ACTIVITY OF EPSILON AURIGAE? I.-S. Nha, S.J. Lee 28 September 1983 2406 PHOTOELECTRIC OBSERVATIONS OF 20 CVn Y.W. Chun, Y.S. Lee, I.-S. Nha 30 September 1983 2407 MINIMUM TIMES OF THE ECLIPSING VARIABLES AH Cep AND IU Aur Pavel Mayer, J. Tremko 4 October 1983 2408 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR EV Lac IN 1980 G. Asteriadis, S. Avgoloupis, L.N. Mavridis, P. Varvoglis 6 October 1983 2409 HD 37824: A NEW VARIABLE STAR Douglas S. Hall, G.W. Henry, H. Louth, T.R. Renner 10 October 1983 2410 ON THE PERIOD OF BW VULPECULAE E. Szuszkiewicz, S. Ratajczyk 12 October 1983 2411 THE UNIQUE DOUBLE-MODE CEPHEID CO Aur E. Antonello, L. Mantegazza 14 October 1983 2412 FLARE STARS IN TAURUS A.S. Hojaev 14 October 1983 2413 BVRI PHOTOMETRY OF THE ECLIPSING BINARY QX Cas Thomas J. Moffett, T.G. Barnes, III 17 October 1983 2414 THE ABSOLUTE MAGNITUDE OF AZ CANCRI William P. Bidelman, D. Hoffleit 17 October 1983 2415 NEW DATA ABOUT THE APSIDAL MOTION IN THE SYSTEM OF RU MONOCEROTIS D.Ya. Martynov 18 October 1983 2416 V LIGHT CURVE OF CC COMAE G.V. Zhukov 18 October 1983 2417 SPECTROSCOPIC INVESTIGATION OF SZ Lyn AND SS Psc G.A. Garbuzov 18 October 1983 2418 INACTIVE STATE OF MV LYRAE I.L. Andronov, S.Yu. Shugarov 18 October 1983 2419 HD 34409 - A DELTA SCUTI VARIABLE R.K. Srivastava, A.K. Arya 19 October 1983 2420 TWO NEW VARIABLE STARS IN THE FIELD OF NGC 6946 G. Romano, M. Perissinotto 19 October 1983 2421 NOTE OF THE SEMI-REGULAR VARIABLE TT Scl P.S. The 24 October 1983 2422 FT LUPI: STUDY OF THE PERIOD AND LIGHT CURVE S.L. Lipari, R.F. Sistero 24 October 1983 2423 V1057 CYGNI Gunnar Welin 25 October 1983 2424 PHOTOELECTRIC MINIMA TIMES OF BX ANDROMEDAE P. Rovithis, H. Rovithis-Livaniou 1 November 1983 2425 DETERMINATION OF CEPHEID DISTANCES BY MEANS OF WESENHEIT FUNCTION Antoni Opolski 1 November 1983 2426 AD Leo FLARE MONITORING Richard B. Herr, J.D. Frank 2 November 1983 2427 PHOTOELECTRIC HalphaW OBSERVATIONS OF R CMa M.T. Edalati, B. Khalesse, N. Riazi 2 November 1983 2428 NEW OBSERVATIONS OF HZ Her V.V. Hambarian, G.H. Broutian CORRIGENDUM 8 November 1983 2429 PHOTOMETRIC STUDY OF IO ANDROMEDAE I.L. Andronov 9 November 1983 2430 ON THE CYCLE LENGTH OF THE CATACLYSMIC VARIABLE T LEONIS W. Wenzel 9 November 1983 2431 SUDDEN BRIGHTENING OF THE RECENTLY DISCOVERED Be STAR HR 7739 K. Pavlovski, H. Bozic, P. Harmanec, J. Horn, P. Koubsky 14 November 1983 2432 POLARIMETRY OF Be STARS IN THE OPEN CLUSTER NGC 6611 L.A.S. Reis, E. Janot-Pachecho 18 November 1983 2433 A NEW PROBABLE FLARE STAR N. Sanduleak 23 November 1983 2434 ANOTHER SEMI-REGULAR VARIABLE IN CYGNUS G. Auner, H. Hartl, R. Weinberger 25 November 1983 2435 ON THE VARIABILITY OF THE STAR SAO 072799 P.G. Niarchos 25 November 1983 2436 ON THE PERIOD OF BD Cir Silvano F. Marton, A. Grieco 28 November 1983 2437 PHOTOELECTRIC OBSERVATIONS OF UV CETI M.K. Tsvetkov, L.N. Mavridis, G.A. Asteriadis 29 November 1983 2438 PERIODIC LIGHT VARIABILITY OF PG1711+336 A.V. Mironov, V.G. Moshkalev, S.Yu. Shugarov 30 November 1983 2439 V417 AQUILAE: PHOTOELECTRIC OBSERVATIONS AND IMPROVED PERIOD Danny R. Faulkner 2 December 1983 2440 V3876 Sgr, A MIRA STAR, NOT A NOVA Emilia P. Belserene 5 December 1983 2441 PHOTOMETRIC VARIATIONS IN THE Ap STAR HD 215441 M. Corbin 5 December 1983 2442 PHOTOELECTRIC OBSERVATIONS OF R CrB D. Bohme 9 December 1983 2443 REMARKS ON THREE VARIABLE STARS Thomas Berthold 9 December 1983 2444 EPSILON AURIGAE Eugenio E. Mendoza V. 13 December 1983 2445 POLARIMETRIC OBSERVATIONS OF Be STARS L.A.S. Reis, E. Janot-Pachecho 14 December 1983 2446 THE HBeta EMISSION OF PU Vul Liu Zongli, Hao Xiangliang 16 December 1983 2447 THE Be BINARY HR 2142: NO 0.13m BRIGHTNESS DECREASE IN JANUARY 1983 P. Harmanec, J. Horn, P. Koubsky, K. Pavlovski, H. Bozic, J. Ziznovsky, J.R. Percy 16 December 1983 2448 A NOTE ON X TRIANGULI P. Rovithis, H. Rovithis-Livaniou 20 December 1983 2449 X-RAY VARIABLE STARS IN THE PLEIADES S. Sciortino, G. Micela, S. Serio, G.S. Vaiana, L. Golub, F.R. Harnden, Jr., R. Rosner 20 December 1983 2450 FLARE LIKE ACTIVITY IN AR LACERTAE R.K. Srivastava 23 December 1983 2451 PHOTOELECTRIC TIMES OF MINIMA OF ECLIPSING VARIABLES P.G. Niarchos 23 December 1983 2452 ACTIVE AND INACTIVE STATES OF THE X-RAY BINARY 4U 2129+47 = V1727 CYGNI W. Wenzel 27 December 1983 2453 VARIABLE STAR TIMINGS FROM ARIZONA Andrew P. Odell, F. Dorchak, K. Rogalski, S. Tapia, W.Z. Wisniewski, D.H. Smith 27 December 1983 2454 HD 104901B AN F-TYPE SUPERGIANT ECLIPSING BINARY Olin J. Eggen 28 December 1983 2455 Halpha VARIABILITY IN ALPHA LYRAE P.S. Goraya, M. Singh 30 December 1983 2456 CO Aur - DOUBLE MODE CHARACTER CONFIRMED B. Fuhrmann, R.H. Schult 2 January 1984 2457 NEW PHOTOELECTRIC MINIMA TIMES OF VW CEPHEI P. Rovithis, H. Rovithis-Livaniou 4 January 1984 2458 A DATABASE FOR RS CVn BINARY STAR SYSTEMS E. Nelson, M. Zeilik 6 January 1984 2459 THE LONG TIME BEHAVIOUR OF THE POLAR AM Her IN 1983 W. Gotz 10 January 1984 2460 ON THE DELTA SCUTI-LIKE VARIABILITY OF THE Ap STAR HD 10088 Tobias J. Kreidl 16 January 1984 2461 THE LIGHT CURVE OF FG Vul IN 1983 W. Gotz 18 January 1984 2462 ON THE SX Phe-TYPE STARS M.S. Frolov, B.N. Irkaev 20 January 1984 2463 NEW DATA ON THE MOST RECENT MINIMUM OF THE X-RAY SOURCE KR Aur Martha H. Liller, M.D. Popova 20 January 1984 2464 REVISED PHOTOMETRIC RESULTS OF SAO 072799 P.G. Niarchos 24 January 1984 2465 NARROW BAND PHOTOMETRY OF FG Vir P. Lopez de Coca, R. Garrido, V. Costa, A. Rolland 27 January 1984 2466 WEAKENING OF HBeta EMISSION OF PU Vul Liu Zongli, Hao Xiangliang 30 January 1984 2467 FURTHER OBSERVATIONS OF THE CENTRAL STAR IN THE PLANETARY NEBULA NGC 2346 Brian F. Marino, H.O. Williams, W.S.G. Walker 1 February 1984 2468 THE ORBITAL PERIOD AND PHOTOGRAPHIC LIGHT CURVE OF THE ECLIPSING BINARY V339 Per E.H. Geyer, F. Gieseking 3 February 1984 2469 PERIOD CHANGE OF THE ECLIPSING BINARY IM AURIGAE O. Gulmen, C. Sezer, N. Gudur 6 February 1984 2470 OUTBURST OF VY Aqr IN 1983 Masaaki Huruhata 6 February 1984 2471 POSSIBLE DISCOVERY OF REPEATING OSCILLATIONS IN THE BRIGHTNESS OF BY DRACONIS ON TIMESCALES OF 1-3 HOURS P.F. Chugainov 7 February 1984 2472 LACK OF DETECTION OF A 1.77 h -PERIODICITY IN THE CP STAR HD 32633 Tobias J. Kreidl 8 February 1984 2473 EPOCHS OF MINIMUM LIGHT, DISPLACED SECONDARY ECLIPSE OF SW LACERTAE Danny R. Faulkner, E.E. Evans III, D.H. Grossoehme, E.J. Moyer, Jr. 8 February 1984 2474 NEW OBSERVATIONS OF CN ANDROMEDAE E.J. Michaels, N.L. Markworth, J.B. Rafert 8 February 1984 2475 PERIODIC LIGHT CURVE VARIATIONS OF RT LACERTAE S. Evren, C. Ibanoglu, Z. Tunca, O. Tumer 9 February 1984 2476 NEW VARIABLE STARS IN THE Gamma CYGNI REGION Katya P. Tsvetkova 10 February 1984 2477 ON THE PERIOD OF BH CENTAURI Tibor J. Herczeg 13 February 1984 2478 ON THE PERIODS OFF RZ COMAE AND V1073 CYGNI Zeki Aslan, T.J. Herczeg 13 February 1984 2479 ON THE PERIOD OF THE W UMa SYSTEM Epsilon CrA J. Manfroid, M. Lunel, J. Bergeat, P. Bouchet 15 February 1984 2480 THE PHASE BEHAVIOUR OF THE GENEVA Z AND DELTA(V1-G) PARAMETERS FOR 41 Tau, 56 Tau AND 49 Cnc M. Muciek, J. Gertner, P. North, F.G. Rufener 17 February 1984 2481 ON THE NATURE OF THE CATACLYSMIC BINARY V2051 OPHIUCHI W. Wenzel 22 February 1984 2482 A FLARE-LIKE EVENT ON THE LIGHT CURVE OF V351 Ori G.U. Kovalchuk 24 February 1984 2483 FO And - PROBABLY A NEW MEMBER OF THE SU UMa SUB-GROUP OF DWARF NOVAE L. Meinunger 29 February 1984 2484 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR UV Cet IN OCTOBER 1983 I.V. Ilyin 1 March 1984 2485 THE ECLIPSE OF THE SYMBIOTIC ECLIPSING BINARY SYSTEM CI CYGNI IN 1982 T.S. Belyakina 5 March 1984 2486 THE DISCOVERY OF A W URSAE MAJORIS VARIABLE IN THE VISUAL BINARY SYSTEM ADS 9019 R.L. Walker 6 March 1984 2487 PHOTOELECTRIC OBSERVATIONS OF THE EW-VARIABLE VZ Psc E. Poretti 6 March 1984 2488 IMPROVED POSITIONS FOR 15 CATACLYSMIC VARIABLE STARS Alan L. Kiplinger 7 March 1984 2489 NEW DOUBLE-LINED ECLIPSING BINARIES FOUND WITH RETICON, DIGICON, AND CCD DETECTORS Claud H. Lacy 7 March 1984 2490 IMPROVED OUTBURST LIGHT CURVES OF THE NOVAE EY Aql, BC Cas, MT Cen, AND V745 Sco H.W. Duerbeck 7 March 1984 2491 HIGHLY EXCITED EMISSION LINES IN BX Mon AND ZZ CMi T. Iijima 13 March 1984 2492 A CLOSE ECLIPSING BINARY SYSTEM IN CYGNUS S.Yu.
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