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Commission 27 of the Iau Information Bulletin COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 3401 - 3500 1989 December - 1990 August EDITORS: L. SZABADOS and B. SZEIDL KONKOLY OBSERVATORY H-1525 BUDAPEST P.O. Box 67, HUNGARY HU ISSN 0374 - 0676 CONTENTS 3401 TWO-COLOUR-LIGHTCURVE AND PRELIMINARY ELEMENTS FOR AL Leo F. Agerer, D. Lichtenknecker 8 December 1989 3402 CCD PHOTOMETRY OF V1500 CYGNI IN 1987 AND 1989 R.E. Schmidt, J.A. DeYoung, B.C. Wagner 11 December 1989 3403 1988 LIGHT CURVES OF RX HERCULIS O. Demircan, E. Derman 12 December 1989 3404 1989 LIGHT CURVES OF BH Vir E. Derman, A. Akalin, O. Demircan 12 December 1989 3405 REMARK ON THE TWO DWARF NOVAE V632 CYGNI AND V630 CYGNI W. Wenzel 14 December 1989 3406 REVISED ELEMENTS AND LIGHT CURVE FOR LS Del M. Wieck, E. Wunder 18 December 1989 3407 RADIAL VELOCITIES OF SOME BRIGHT SOUTHERN STARS M. Clark 27 December 1989 3408 TIMES OF MINIMUM LIGHT FOR 16 ECLIPSES OF 8 APSIDAL MOTION BINARIES D.B. Caton, R.Lee Hawkins, W.C. Burns 27 December 1989 3409 PHOTOELECTRIC OBSERVATIONS OF UW Ori Zhang Rong-Xian, Zhang Ji-Tong, Li Qi-Sheng, Zhai Di-Sheng, Zhang Xiao-Yu 28 December 1989 3410 THE PERIOD OF KO Aur Zhang Rong-Xian, Zhang Ji-Tong, Zhai Di-Sheng 28 December 1989 3411 NOVA OPHIUCHI 1988 MONITORED 2.5 MONTHS AFTER OUTBURST R. Haefner 29 December 1989 3412 THE PERIOD OF Gamma DORADUS A.W.J. Cousins, J.A.R. Caldwell, J.W. Menzies 29 December 1989 3413 VARIABLE POLARIZATION IN A COMPARISON STAR OF V3885 Sgr K. Metz 3 January 1990 3414 BV PHOTOELECTRIC PHOTOMETRY OF SN 1987A IN SOUTH BRASIL L.A.L. da Silva 5 January 1990 3415 LIGHT CURVES FOR AE PHOENICIS T. Banks, D. Sullivan 8 January 1990 3416 1988 AND 1989 BV PHOTOMETRY OF WY Cnc P.A. Heckert, M. Zeilik 8 January 1990 3417 A T TAURI STAR WITH STRONG [S II] EMISSION LINES E.E. Mendoza, Y. Andrillat, A. Rolland 10 January 1990 3418 V1129 Cyg IS NOT AN OPTICAL COUNTERPART OF IRC +30374 = AFGL 2417 A. Alksnis, M. Eglite, I. Platais 11 January 1990 3419 A LIGHT CURVE FOR HD 46282 = V683 Mon E.M. Halbedel 12 January 1990 3420 THE NATURE OF THE VARIABILITY OF HD 177559 E.M. Halbedel 12 January 1990 3421 NEW PERIOD OF CT TAURI K. Wlodarczyk, M. Drozdz 14 January 1990 3422 IAU ARCHIVES OF UNPUBLISHED OBSERVATIONS OF VARIABLE STARS: ELECTRONIC STORAGE AND RETRIEVAL OF DATA M. Breger, C. Jaschek, P. Dubois 16 January 1990 3423 PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES D. Hanzl 23 January 1990 3424 RAPID SHELL LINE VARIATIONS IN THE Be STAR Omega Ori M. Bossi, G. Guerrero, M. Scardia, A. Stasi 24 January 1990 3425 SS URSAE MINORIS: A NORMAL U Gem TYPE DWARF NOVA A. Udalski 29 January 1990 3426 FG Vir, ADDITIONAL PHOTOELECTRIC OBSERVATIONS S.F. Gonzalez-Bedolla, E. Rodriguez 1 February 1990 3427 PERIOD CHANGE IN AD CMi E. Rodriguez, A. Rolland, P. Lopez de Coca 1 February 1990 3428 NEW TIMES OF MAXIMA FOR CY Aqr, DY Peg AND BL Cam E. Rodriguez, A. Rolland, P. Lopez de Coca 1 February 1990 3429 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR UV Cet IN 1983 L.N. Mavridis, P. Varvoglis 5 February 1990 3430 THE X-RAY SOURCE 1E2119.7+1655 IS A W UMa SYSTEM R.M. Robb 5 February 1990 3431 K1040 - A NEW 4.3 HOUR RED GIANT VARIABLE STAR IN M15 Yao Bao-An 8 February 1990 3432 LONG-TERM LIGHT-CURVE OF THE IRREGULAR VARIABLE OR ANDROMEDAE W. Wenzel, K. Haussler 8 February 1990 3433 A NEW SUSPECTED POLARIZATIONAL VARIABLE IN CYGNUS S. Marchenko, A. Morozhenko, V. Vinoglyadov 19 February 1990 3434 A CCD LIGHT CURVE OF THE ECLIPSING CATACLYSMIC VARIABLE PG 0027+260 Li Yong, Jiang Zhaoji, Chen Jiansheng, Wei Mingzhi 20 February 1990 3435 PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES L.P. Surkova 23 February 1990 3436 V3903 SAGITTARII: ANOTHER O-TYPE ECLIPSING BINARY N.C.S. Cunha, L.P.R. Vaz, C.M.M. Possa, B.E. Helt, J.V. Clausen 1 March 1990 3437 CHANGES IN THE LIGHT CURVE OF AB DORADUS (HD 36705) G. Anders 2 March 1990 3438 ON THE PERIOD OF THE W UMa STAR YZ PHOENICIS D. Kilkenny, F. Marang 6 March 1990 3439 POLARIMETRY OF R CORONAE BOREALIS TYPE STARS AND RELATED OBJECTS A.E. Rosenbush, V.K. Rosenbush 6 March 1990 3440 OBSERVATIONS OF THE DWARF NOVA CI GEMINORUM W. Wenzel 7 March 1990 3441 GROUND-BASED OBSERVATIONS TO SUPPORT ASTRO-1 E.M. Schlegel 8 March 1990 3442 SEVEN MORE UNDESIGNATED VARIABLE STARS D.H. Kaiser, M.E. Baldwin, D.B. Williams 9 March 1990 3443 OBSERVATIONS OF FOUR DHK RED VARIABLES D.B. Williams 9 March 1990 3444 PULSATION PERIOD OF CY Cnc A. Rolland, J.M. Garcia-Pelayo, E. Rodriguez, P. Lopez de Coca 12 March 1990 3445 HR 8062 A NEW VARIABLE IN CYGNUS L.F. Snyder 14 March 1990 3446 1988 AND 1989 UBV PHOTOMETRY OF BD +61d1211 P.A. Heckert 26 March 1990 3447 SAO 23229: A NEW DOUBLE-LINED SPECTROSCOPIC ECLIPSING BINARY L.A. Marschall, R.P. Stefanik, H.L. Nations, R.J. Davis 27 March 1990 3448 NEW DOUBLE-LINED ECLIPSING BINARIES C.H. Lacy 27 March 1990 3449 R CrB AT THE BEGINNING OF THE VISUAL LIGHT MINIMUM A.E. Rosenbush, V.K. Rosenbush, D.F. Gayday 2 April 1990 3450 A PERIOD DETERMINATION FOR M28 V7 A. Wehlau, C.M. Clement 2 April 1990 3451 CONFUSION CONCERNING THE VARIABILITY OF HR 5492 (= DL Dra) AND HR 5437 M. Paparo, Jiang Shi-Yang, Li Zhi-Ping, Z. Kollath 3 April 1990 3452 TV Nor, ANOTHER ECLIPSING Ap STAR P. Renson 18 April 1990 3453 NO MAJOR PERIOD CHANGE FOR CT TAURI D.B. Williams, M.E. Baldwin 26 April 1990 3454 PACIFIC RIM COLLOQUIUM ON NEW FRONTIERS IN BINARY STAR RESEARCH K.-Ch. Leung, Il-Seong Nha 27 April 1990 3455 LIGHT CURVES FOR R ARAE T. Banks 2 May 1990 3456 AN OPTICAL FLARE OF THE RS CVn SYSTEM V711 Tau IN 1989 Zhang Rong-Xian, Zhai Di-Sheng, Zhang Xiao-Bin, Zhang Ji-Tong, Li Qi-Sheng 3 May 1990 3457 STROMGREN PHOTOMETRY OF A POSSIBLE VARIABLE STAR NEAR NGC 663 H.-G. Reimann 7 May 1990 3458 PHOTOELECTRIC OBSERVATIONS OF XY LEONIS AND ITS PERIOD CHANGES J. Krzesinski, E. Kuczawska, M. Kurpinska-Winiarska 7 May 1990 3459 COMMISSION 27 REPORT 1987-1990 M. Breger 9 May 1990 3460 ROTATIONAL VELOCITIES OF G AND K GIANTS J.A. Eaton 11 May 1990 3461 UBVR PHOTOMETRY OF THE ZZ CETI STAR G185-32 D.W. Hoard, E. Nagasako, W. Sandmann 14 May 1990 3462 TIME OF ECLIPSE FOR THE BINARY SYSTEM PV Cas D.W. Hoard, E. Nagasako, W. Sandmann 14 May 1990 3463 PHOTOELECTRIC OBSERVATIONS OF THE O+O ECLIPSING BINARY V3903 Sgr M.A. de Laurenti, M.A. Cerruti 16 May 1990 3464 GM SAGITTARII: STRANGE LIGHT CHANGES IN A BINARY SYSTEM V.P. Goranskij 22 May 1990 3465 SUPERNOVA IN ANONYMOUS GALAXY M. Lovas 22 May 1990 3466 RECENT PHOTOMETRIC BEHAVIOUR OF MWC 560 T. Tomov, R. Zamanov, A. Antov, L. Georgiev 24 May 1990 3467 HD 93044: A NEW DELTA SCUTI VARIABLE? Li Zhi-Ping, Tan Qing-Quan, Cao Ming 25 May 1990 3468 THE SYSTEM OF EQUIVALENT WIDTHS OF FeI-ABSORPTION LINES FOR DETERMINING REGIONAL TEMPERATURES IN PHYSICAL VARIABLE STARS Z.N. Fenina, N.S. Zgonyaiko, N.D. Lemeshchenko 28 May 1990 3469 1989 BVR LIGHT CURVES OF RT And S. Gordon, S. Hall, M. Ledlow, E. Mann, M. Zeilik 1 June 1990 3470 FURTHER BV PHOTOMETRY OF V1727 Cyg IN A LOW STATE J. Kaluzny, B. Mazur 4 June 1990 3471 B, V, R, I LIGHT CURVES OF EH HYDRAE R.G. Samec, S.D. Charlesworth 4 June 1990 3472 THE UNIQUE MANIFESTATION OF THE MATTER OUTFLOW IN THE ECLIPSING BINARY SYSTEM V361 Lyr S.Yu. Shugarov, V.P. Goranskij, M.P. Galkina, N.A. Lipunova 6 June 1990 3473 A CALL FOR OPTICAL PHOTOMETRY AND SPECTROSCOPY OF ACTIVE COOL STARS TO COMPLEMENT ROSAT X-RAY OBSERVATIONS J.D. Jeffries 7 June 1990 3474 CH CYGNI: A VERY DEEP MINIMUM ACCOMPANIED BY AN EPISODE OF ACTIVITY L. Leedjarv 7 June 1990 3475 PHOTOMETRIC OBSERVATIONS OF THE WR STAR ROBERTS 93 I.I. Antokhin, A.M. Cherepashchuk, T.R. Irsmambetova, S.Yu. Shugarov 7 June 1990 3476 AS 296 IS IDENTICAL TO FG SERPENTIS E. Schweitzer 11 June 1990 3477 PHOTOMETRY OF alpha Ori (Sep 1988 TO Apr 1990) AND A REASSESSMENT OF SOME PREVIOUSLY PUBLISHED DATA K. Krisciunas 12 June 1990 3478 FIRST BV LIGHT CURVE FOR THE ECLIPSING BINARY PP LACERTAE M. Dumont, A. Maraziti 12 June 1990 3479 PHOTOMETRY OF THE ECLIPSING BINARY DHK 11 = SAO 23229 D.B. Williams, H.J. Landis, D. Pray 14 June 1990 3480 THREE NEW VARIABLE STARS D.H. Kaiser 14 June 1990 3481 PHOTOMETRY OF THE NEW ECLIPSING BINARY DHK 11 = HD 31679 D.B. Williams, J.E. Wood, D.H. Kaiser 14 June 1990 3482 FLARE STAR OBSERVATIONS IN THE NGC 7000 - IC 5070 REGION M.K. Tsvetkov 18 June 1990 3483 PHOTOGRAPHIC PHOTOMETRY OF RT Cep E.H. Semkov 18 June 1990 3484 PHOTOELECTRIC OBSERVATIONS OF VZ CANCRI 1988-1990 W. Quester 20 June 1990 3485 PERIOD VARIATIONS OF SS ARIETIS M. Kurpinska-Winiarska, B. Zakrzewski 26 June 1990 3486 ATMOSPHERIC ECLIPSE OF Delta Sge O. Demircan, E. Derman, A. Akalin 28 June 1990 3487 THE DISAPPEARANCE OF MINIMA OF ECLIPSING BINARY SS Lac IN OPEN CLUSTER NGC 7209 M.M.
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