COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS

Nos. 3201- 3300

June 1988 - March 1989

EDITORS: L. SZABADOS and B. SZEIDL

KONKOLY OBSERVATORY H - 1525 BUDAPEST P.O. BOX 67, HUNGARY

HU ISSN 0374 - 0676

C O N T E N T S 1988

No. Page

3201 R. NELSON, E.F. MILONE, J.E. PENFOLD: The short-period eclipsing binary V728 Herculis ........................................... 1-23202 E.J. MICHAELS: AG Virginis: new times of minima and period study 1-63203 A.D. ANDREWS: Remarks on modified auto-correlation analyses and their application in a search for "time signatures" of micro-variability in the dMe flare star V1285 Aql .............. 1-63204 L. ILIEV, B. KOVACHEV, M. RUUSALEPP: Pleione again without shell 1-43205 H.-J. BLASBERG, W. WENZEL: On the recent period change of the RR Lyrae star XZ Cygni ......................................... 13206 C.R. MULLIS, D.R. FAULKNER: A period change in WY Cancri ....... 1-23207 A. LAPETA, G. PAJDOSZ: Blue light curve of VW Cep system ....... 1-43208 W. GOTZ: Optical behaviour of AT Cancri in the season 1988 ..... 1-23209 H. GESSNER: EF Pegasi .......................................... 13210 Z. KRAICHEVA: MV Lyrae at minimum light in May 1988 ............ 13211 C. ROUSSEAU, J.I. BOURASSA, E.F. MILONE: VBI light curves of CC And ............................................................ 1-33212 YOSHIHARU ITO: BV observations of HU Tauri ..................... 1-33213 F. AGERER, D. LICHTENKNECKER: Two-colour light curves and preli- minary elements for CV Dra, DD Dra ............................. 1-43214 W.A. LAWSON, P.M. KILMARTIN, A.C. GILMORE: UBV photometry of R Coronae Borealis ............................................... 1-33215 M. RODONO, J.E. NEFF: Coordinated ultraviolet, optical and radio observations of EI Eri (=HD 26337). Call for observations ...... 1-23216 GUO YU-LIAN: Shell spectrum variations of Pleione .............. 1-23217 R.K. SRIVASTAVA: Eclipsing binary signatures in Zeta Capricorni 1-23218 S. ZOLA, J. KRZESINSKI: Photoelectric light curve of V 502 Oph . 1-33219 F.A. CATALANO, F. LEONE, S. VACCARI: UBV photoelectric photomet- ry of the late type stars HD 22649 and HD 23475 . 1-23220 F.A. CATALANO, F. LEONE, S. VACCARI: On the period of the light variations of the Mn star HD 27295 ............................. 1-23221 R. PENICHE, J.H. PENA: A new short period variable star in Orion 1-43222 D. BOEHME: Photoelectric observations of Gamma Cas, X Per and BU Tau ......................................................... 1-23223 Y. ANDRILLAT: Spectral variation of CH Cygni in the near infrared 1-33224 D.V. ARGANBRIGHT, W.OSBORN, D.S. HALL: A total eclipse in RZ Cassiopeiae? ................................................... 1-43225 R. PLUME, J.R. PERCY: Photoelectric observations of HR 4047 .... 1-33226 J.M. MATTHEWS; D.A. BOHLENDER: Light variability of the Helium- strong star HD 96446 ............... ........................... 1-63227 K. KRISCIUNAS, D. FISHER: Photometry of Alpha Ori (Betelgeuse), Gamma Ori, and Phi-2 Ori ....................................... 1-73228 M.V. MEKKADEN, D. SINACHOPOULOS: Photometric variability of HD 81410 in 1988 .................................................. 1-33229 G. CUTISPOTO: UBV(RI)_c observations of SN 1987A ............... 1-23230 R.G. SAMEC, R.E. FULLER, R.H. KAITCHUCK: 1976 light curves of BX Andromedae ..................................................... 1-33231 W.A. FEIBELMAN: Cn I-2 (=PK 326 - 10.1 deg) .................... 13232 G. CUTISPOTO, M. RODONO: UBV(RI)* photometry of AB Dor ......... 1-43233 D.H. KAISER: A period determination for the eclipsing binary NSV 03005 .......................................................... 1-23234 F. AGERER, B.-C. KAMPER, D. LICHTENKNECKER: Further observations, improved position and ephemeris for the EW type system V 728 Her 1-43235 D. KILKENNY, J. SPENCER JONES, F. MARANG: Variability in the high latitude Be star JL2I2 (=CPD -56o154) .......................... 1-4

3236 B. VETO: Search for short time scale light variation in HD 183339 and HD 184927 .................................................. 1-43237 O. DEMIRCAN, E. DERMAN, S. SELAM: The first photoelectric light curve of V456 Ophiuchi ......................................... 1-23238 A. UDALSKI, M. SZYMANSKI, A. SCHWARZENBERG-CZERNY: Fast changes in the shape of the light curve of the old nova V603 Aql ....... 1-33239 A. UDALSKI: Photometry of cataclysmic variables. III. Photometry of SU UMa during normal outburst ............................... 1-33240 B.E. MARTIN, D.P. HUBE: The variable star 42 Persei ............ 1-23241 M. KUN, L. SZABADOS: On the association membership of the Cepheid IR Cep ......................................................... 1-33242 W. GOTZ: Optical behaviour of the polar ST Leonis Minoris = CW 1103 + 254 in the season 1988 ............................... 13243 R.B. HERR, F.M. CAPUTO: DO Cep flare monitoring in the 1987-1988 season ......................................................... 1-43244 J.G. DOYLE: The mechanical energy budget in stellar flares ..... 1-23245 A. SKOPAL: Photometric evidence of the end of the active phase of CH Cyg ...................................................... 1-33246 M. BOSSI, M. SCARDIA, M. TADINI: Radial velocities of the binary star HD 37 020 (Theta^1 Ori A) ................................. 1-23247 C.H. HELLER, K.S. KRAMER: A new rapidly oscillating Ap star in the northern hemisphere ........................................ 1-23248 A.D. ANDREWS: Micro-flaring of dMe stars: A connection between X-ray luminosities and "time signatures" of ultraviolet fluc- tuations? ...................................................... 1-43249 A. DAPERGOLAS, E. KONTIZAS, M. KONTIZAS: 1988 BV photometric observations of CG Cyg ......................................... 1-33250 J.G. DOYLE: X-ray/optical flares on RS CVn stars ............... 1-23251 G. PAJDOSZ, S. ZOLA: New elements of CK Boo .................... 1-23252 E. PAVLENKO, J. PELT: Slow variability of V 1500 Cyg .......... 1-43253 P. HECKERT, M. ZEILIK: 1987 photometry of XY Ursae Majoris ..... 1-43254 M. LOVAS, E. ZSOLDOS: Variable B in M33: a binary star? ........ 1-33255 D. ALLEN: KX TrA=Cn I-2=PK 326-10.1 deg ........................ 13256 W.J. SCHUSTER: Flare observed for a high velocity star ......... 1-43257 B. MUSIELOK: Rotation of the magnetic Ap star 56 Ari ........... 1-43258 Z. GLOWNIA: UBV observations of VW Cephei ..................... 1-43259 B.N. FIRMANYUK: RS Boo. The peculiarities of Blazhko effect ma- nifestation .................................................... 1-53260 R. HAEFNER: The optical behaviour of the X-ray source GX 304-1 during 1985-1988 ............................................... 1-33261 R. HAEFNER: On the primary mass of NSV 12615 ................... 1-23262 K. SZATMARY: BV photometry of Iota Bootis ...................... 1-33263 P. HARMANEC, P. HADRAVA, Z. RUZIC, K. PAVLOVSKI, H. BOZIC, J. HORN, P. KOUBSKI: o And: another major shell phase just coming? 1-43264 J. PATTERSON: On the orbital period of FO Aquarii .............. 1-63265 J.H. SPENCER JONES: The W UMa stars AB Tel and BF Pav .......... 1-33266 O. GULMEN, N. GUDUR, C. SEZER, Z. EKER, V. KESKIN, B. KILINC: A new period change of BX And .................................. 1-43267 A. DAPERGOLAS, E. KONTIZAS, M. KONTIZAS: Photoelectric UBV light curves of RT And ......................................... 1-3 M. BOSSI, M. SCARDIA, M. TADINI: Amendment .................... 43268 C.F. PROSSER: Variables near NGC 6760 ......................... 1-23269 L. MANTEGAZZA: The spectral types of the supergiants HR 8752 and Rho Cas .................................................... 1-43270 R.B. HERR, D.H. CHARACHE: AD Leo: flare activity in 1988 ....... 1-43271 HAO XIANG-LIANG: Photographic observations of V651 Mon, the central star of the planetary nebula NGC 2346 .................. 1-43272 L. KOHOUTEK: Photometry of the eclipsing binary W Cru ......... 1-43273 M. BANACZKOWSKI, T.Z. DWORAK:. The farthest known eclipsing binaries in our galaxy ......................................... 1-2

3274. P.A. HECKERT, D. SUMMERS, R. HARKEY, V. SANDOVAL, C. PILKEY: UBV photometry of BD + 61d1211 during 1986 and 1987 ............ 1-63275 M. KURPINSKA-WINIARSKA, M. WINIARSKI; ST. ZOLA: A new variable star BD +2d1867 ................................................ 1-33276 H.A. MAHDY, M.A. SOLIMAN, M.A. HAMDY: New photoelectric obser- vations of CY Aquarii .......................................... 1-53277 H.M. AL-NAIMIY, H.A. FLEYEH: Photoelectric observations of ST Aquarii ..................................................... 1-33278 M. FORBES, E. BUDDING, J. PRIESTLEY: Photometric fluctuations in the light curves of R Arae .................................. 1-3

1989

3279 W. GOTZ: Optical behaviour of the polar AM Her in 1988 ......... 1-43280 W. WENZEL: On the supposed periodicity of RZ Piscium .......... 13281 F.A. CATALANO, F. LEONE: On the variability of the Am star 68 Tau (HD 27962) ................................................. 1-3 F.A. CATALANO, F. LEONE: Erratum ............................... 43282 T.J. KREIDL: The rotation period of the Ap star HD 220825 (Kappa Psc) .................................................... 1-23283 H.W. DUERBECK: More about KX TrA=Cn 1-2=PK 326 -10.1 deg=He2 177 1-23284 R. RAJAMOHAN, A. PARANJPYE: The spectrum variable HR 7817= HD 194783 ...................................................... 1-23285 G. GUERRERO, M. BOSSI, M. SCARDIA: Profile variation of the He 6678 line in Zeta Tauri ..................................... I-43286 R.D. LINES, E.F. GUINAN, S.M. CARROLL: Time of minimum determi- nation of the eclipsing binary V541 Cyg ........................ 1-43287 G.A. RICHTER: PG 0818+513 - an eclipsing binary ............... 1-23288 T. OJA: The variable star BD + 41d2447 ......................... 1-33289 E.B. JANIASHVILI, M.I. LAVROV: On the secondary minimum of the eclipsing binary ZZ UMa ........................................ 1-23290 K.G. STRASSMEIER: Variability of LR Hya = HD 91816 not confirmed 1-43291 J. VINKO: Times of minima and the light curve of VW Cep ....... 1-23292 G. PAJDOSZ, D. KJURKCHIEVA, S. ZOLA: UBV photometry of II Peg during October 1988 ............................................ 1-43293 S.A. KHODYKIN, I.M. VOLKOV: WBVR photometry of DI Herculis ..... I-33294 P.A. HECKERT, M. ZEILIK: 1987 photometry of CG Cyg ............. 1-33295 E. ZSOLDOS, J. JURCSIK: Photometry of UU Herculis: 1986-88 ..... 1-33296 J.H. SPENCER JONES: A note on the period of the W UMa star YZ Phoenicis ...................................................... 1-33297 J. MANFROID: On the light curve of HD 27563 .................... 1-43298 P.A. HECKERT, D. SUMMERS, R. HARKEY, V. SANDOVAL: UBV photo- metry of HD 80715 during 1986 and 1987 ......................... 1-43299 R. GROBEL: A major period change in the system TZ Bootis ....... 1-43300 E. PORETTI, A. BERTOGLIO, S. CORTESI: No light variability for Omega Gem ...................................................... 1-2

A U T H O R I N D E X

Agerer, F. 3213,3234 Kun, M. 3241Allen, D. 3255 Kurpinska-Winiarska, M. 3275Al-Naimiy, H.A. 3277 Lapeta, A. 3207Andrews, A.D. 3203,3248 Lavrov, I.I. 3289Andrillat, Y. 3223 Lawson, W.A. 3214Arganbright, D.V. 3224 Leone, F. 3219,3220,3281Banaczkowski, M. 3273 Lichtenknecker, D. 3213,3234Bertoglio, A. 3300 Lines, R.D. 3286Blasberg, H.-J. 3205 Lovas, M. 3254

Boehme, D. 3222 Mahdy, H.A. 3276Bohlender, D.A. 3226 Manfroid, J. 3297Bosei, M. 3246,3267,3285 Mantegazza, L. 3269Bourassa, J.I. 3211 Marang, F. 3235Bozic, H. 3263 Martin, B.E. 3240Budding, E. 3278 Matthews, J.M. 3226Caputo, F.M. 3243 Mekkaden, M.V. 3228Carroll, S.M. 3286 Michaels, E.J. 3202Catalano, F.A. 3219,3220,3281 Milone, E.F. 3201,3211Charache, D.H. 3270 Mullis, C.R. 3207Cortesi, S. 3300 Musielok, B. 3257Cutispoto, G. 3229,3232 Neff, J.E. 3215Dapergolas, A. 3249,3267 Nelson, R. 3201Demircan,0. 3237 Oja, T. 3288Derman, E. 3237 Osborn, W. 3224Doyle, J.G. 3244,3250 Pajdosz, G. 3207,3251,3292Duerbeck, H.W. 3283 Paranjpye, A. 3284Dworak, T.Z. 3273 Pattereon, J. 3264Eker, Z. 3266 Pavlenko, E. 3252Faulkner, D.R. 3206 Pavlovski, K. 3263Feibelman, W.A. 3231 Pelt, J. 3252Firmanyuk, B.N. 3259 Pena, J.H. 3221Fiaher, D. 3227 Penfold, J.E. 3201Fleyeh, H.A. 3277 Peniche, R. 3221Forbes, M. 3278 Percy, J.R. 3225Fuller, R.E. 3230 Pilkey, C. 3274Gessner, H. 3209 Plume, R. 3225Gilmore, A.C. 3214 Poretti, E. 3300Glownia, Z. 3258 Priestley, J. 3278Gotz, W. 3208,3242,3279 Prosser, C.F. 3268Grobel, R. 3299 Rajamohan, R. 3284Gudur, N. 3266 Richter, G.A. 3287Guerrero, G. 3285 Rodono, M. 3215,3232Guinan, E.F. 3286 Rousseau, C. 3211Gulmen, d. 3266 Ruusalepp, M. 3204Guo, Y.-L. 3216 Ruzuc, Z. 3263Hadrava, P. 3263 Samec, R.G. 3230Haefner, R. 3260,3261 Sandoval, V. 3274,3298Hamdy, M.A. 3276 Scardia, M. 3246,3267,3285Hall, D.S. 3224 Schneider, H. 3282Hao, X.-L. 3271 Schuster, W.J. 3256Harkey, R. 3274,3298 Schvarzenberg-Czerny, A. 3238Harmanec, P. 3263 Selam, S. 3237Heckert, P. 3253,3274,3294,3298 Sezer, C. 3266Janiashvili, E.B. 3289 Sinachopoulos, D. 3228Jurcsik, J. 3295 Skopal, A. 3245Kaiser, D.H. 3233 Soliman, M.A. 3276Kaitchuck, R.H. 3230 Spencer Jones, J. 3235,3265,3296Kamper, B.-C. 3234 Srivastava, R.K. 3217Keskin, V. 3266 Strassmeier, K.G. 3290Khodykin, S.A. 3293 Summers, D. 3274,3298Kilinc, B. 3266 Szabados, L. 3241Kilkenny, D. 3235 Szatmary, K. 3262Kilmartin, P.M. 3214 Szymanski, M. 3238Kjurkchieva, D. 3292 Tadini, M. 3246,3267Kohoutek, L. 3272 Udalski, A. 3238,3239Kontizas, E. 3249,3267 Vaccari, S. 3219,3220Kontizas, M. 3249,3267 Veto, B. 3236Koubsky, P. 3263 Vinko, J. 3291Kovachev, B. 3204 Wenzel, W. 3205,3280Kraicheva, Z. 3210 Winiarski, M. 3275

Kramer, K.S. 3247 Zeilik, M. 3253,3294Kreidl, T. 3282 Zola, S. 3218,3251,3275,3292Krisciunas, K. 3227 Zsoldos, E. 3254,3295Krzesinski, J. 3218

I N D E X O F V A R I A B L E S

RT And 3267 HR 4047 3225BO 3273 HR 7167 3247BX 3230,3266 HR 7817 3284CC 3211 HR 8752 3269Omicron 3263ST Aqr 3277 LR Hya 3290CY 3276FO 3264 AD Leo 3270 ST LMi 3242V406 Aql 3268V407 3268 HP Lyr 3273V603 3238 MV Lyr 3210V1285 3203,3248V1297 3268 V 651 Mon 3271

R Ara 3278 New Variables BD +2d1867 327556 Ari 3257 BD +41d2447 3288BD +2d1867 3275 Zeta Cap 3217BD +41d2447 3288 CPD -56d154 3235 G 64-34 3256RS Boo 3259 HD 27295 3220TZ 3299 HD 96446 3226CK 3251 HR 4047 3225Iota 3262 HR 7167 3247 HR 7817 3284BD Cam 3219 Gamma Ori 3227BE 32I9 PG 0818+513 3287 RA=5h09m07s, D= -8d37'59"WY Cnc 3206 (1950) 3221AT 3208 NSV 03005 3233YY CMi 3275 NSV 12615 3261

UX CVn 3273 V456 Oph 3237Zeta Cap 3217 V502 3218 V1045 3203FP Car 3273 ER Ori 3221RZ Cas 3224 Alpha 3227UU 3273 Gamma 3227AQ 3273 Phi-2 3227V366 3273Gamma 3222 BF Pav 3265Rho 3269 AG Peg 3255V645 Cen 3203 EF 3209V8I4 3273 II 3250,3292VW Cep 3258,3291DO 3243IR 3241 X Per 3222 V 467 3240

CPD - 56d154 3235 V 471 3273 PG 0818+513 3287R CrB 3214 YZ Phe 3296W Cru 3272,3273XZ Cyg 3205 RZ Psc 3280CG 3249,3294 Kappa 3282CH 3223,3245V541 3286 HM Sge 3231V698 3273V1016 3231 RY Sct 3273V1329 3255V1500 3252 SN 1987A 3229

AB Dor 3232 BU Tau 3204,3216,3222 HU 3212CV Dra 3213 V776 3281DD 3213 Zeta 3285EI Eri 3215 AB Tel 3265Extragalactic VariableVar B in M 33 3254 KX TrA 3231,3255,3283

G 64-34 3256 SU UMa 3239 VY 3225Omega Gem 3300 XY 3253 ZZ 3289HD 27295 3220,3281 DM 3274HD 27563 3297HD 37020 3246,3267 Variables in ClustersHD 80715 3298 near NGC 6760 (4) 3268HD 81410 3228HD 96446 3226 AG Vir 3202HD 183339 3236HD 184927 3236 X-ray Source GX 304-1 3260W Her 3295AM 3279DI 3293V728 3201,3234