COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 2901 - 3000 1986 June - 1987 March EDITORS: B. SZEIDL and L.SZABADOS, KONKOLY OBSERVATORY 1525 BUDAPEST, Box 67, HUNGARY HU ISSN 0374-0676 C O N T E N T S 1986 No Page 2901 S. VAN AMERONGEN, F. TESSELAAR and J. VAN PARADIJS: Optical Photometry of A 0538-66 during Quiescence ........................................................ 1 - 4 2902 TS.G. TSVETKOV: Spectral Estimation of Luminosity and Other Characteristics of the Delta Scuti Stars AI CVn (=4 CVn) and Delta Ser ..................................................... 1 - 3 2903 S.W. WACKER and E.F. GUINAN: 1985/86 Multi-Color Photo- electric Observations of the Starspot Activity on V711 Tauri (HR 1099) .............................................. 1 - 4 2904 V. REGLERO, J. FABREGAT and A. DE CASTRO: Stromgren uvby-H_beta Photometry of the Solar Type Star HD 206860 ........... 1 - 4 2905 C.E. LOPEZ: The Proper Motion of VX Sgr Derived from Library Material .......................................................... 1 2906 S.YU. GORDA: Photometric Observations of Visual Double Star ADS 9537 (BV Dra, BW Dra) by Area Scanning Technique............... 1 - 4 2907 F. SANTIAGO, J.A. QUESADA, F. PALACIOS J.A. SANCHEZ and M. COBO: Variations of the Light Curve of VW Cep .................. 1 - 4 2908 B.N. ASHOKA and S. PUKALENTHI: Photoelectric Observations of R CrB during the Recent Light Minimum .......................... 1 - 2 ERRATUM to IBVS No. 2891 .......................................... 3 2909 W. WENZEL: Once Again: on the Identity of AK Canis Minoris ........ 1 2910 L. SZABADOS: Infrared Excess of Cepheid Binaries .................. 1 - 3 2911 E. C. OLSON: A New Burst of Activity in U Cephei .................. 1 - 2 2912 P. HARMANEC, J. HORN, P. KOUBSKY and H. BOZIC: A New Bright Be Variable and Suspected Eclipsing Binary ........... 1 - 6 2913 E. ZSOLDOS: UBV Photometry of HR 8752 II .......................... 1 - 3 2914 A. WEHLAU and S. DEMERS: Magnitudes of Bright Variables in the Draco Dwarf Galaxy ......................................... 1 - 2 2915 P.E. ZAKHAROVA, V.P. KOZHEVNIKOV, T.S. POLUSHINA and T.P. ERMAKOVA: B, V Observations of Red Stars in the Neighbourhood of Open Clusters .................................................. 1 - 5 2916 P. ROVITHIS, H. ROVITHIS-LIVANIOU and N. MATSOPOULOS: Photoelectric Minima Times of HD 197433 (VW Cephei) ............... 1 - 2 2917 C. LAZARO and M.J. AREVALO: Infrared Photometry of the Dwarf Nova AH Her ....................................................... 1 - 2 2918 W. GOTZ: Behaviour of AT Cancri in the Season 1985/86.............. 1 - 4 2919 E.M. HALBEDEL: Some New Possible Variable Stars ................... 1 - 2 2920 S.W. WACKER, E.F. GUINAN, G.P. McCOOK, J.C. LOCHNER and B.G. PACZKOWSKI: Autumn 1981 Photoelectric Obser- vations of the Starspot Activity on UX Arietis .................... 1 - 4 2921 T. TOMOV, M. MIKOLAJEWSKI and J. MIKOLAJEWSKA: CH Cyg - Still in Activity ........................................ 1 - 5 2922 C. LAZARO and M.J. AREVALO: 1986 J, K Light Curves of II Peg .................................................. 1 - 2 2923 M. HURUHATA: Photographic Observations of V651 Mon ................ 1 - 4 2924 R. DIETHELM and R.D. LINES: UBV Photometry of YZ Cas .............. 1 - 4 2925 E.F. GUINAN, S.W. WACKER, G.P. McCOOK, W.T. HARRIS, C.R. ROBINSON, E.G. DOMBROWSKI and R.A. DONAHUE: Photometry of the W Cephei - Type Star V641 Cas (=BD +63o0003) .................................................... 1 - 4 2926 R.H. McNAUGHT: Identifications and Astrometric Positions of Cataclysmic Binaries and Related Objects ....................... 1 - 7 2927 R.H.McNAUGHT and G. DAWES: Liller's Nova-Like Object in Centaurus ............................................... 1 – 4 2928 R.H. McNAUGHT and G.DAWES: NSV 6708................................ 1 - 3 2929 N.D. MELIKIAN and M.DELLA VALLE: New Flare Stars in Orion .......................................................... 1 2930 D.R. FAULKNER: An Attempted Confirmation of Archer Variables near the Coma Star Cluster ........................................ 1 - 2 2931 R.G. SAMEC and B.B. BOOKMYER: Photoelectric Light Curves of TY Bootis ...................................................... 1 - 2 2932 H.C. LINES, R.D. LINES, E.F. GUINAN and C.R. ROBINSON: B and V Light Curves of the Massive Close Binary DH Cephei .............. 1 - 4 2933 M. WAKUDA and M. HURUHATA: A Possible Nova in Cygnus ............... 1 - 2 2934 S.R. JABBAR, N.L. JABIR. H.A. FLEYEH and Q.S. MAJEED: Photoelectric Observation of the Eclipsing Binary u Herculis ................................................. 1 - 2 2935 J.D. FERNIE, R. LYONS, B. BEATTIE and R.F. GARRISON: Photometry and Spectroscopy of CH Cyg in 1985 ..................... 1 - 5 2936 S. DEMERS and R. LANG: Observations of Suspected Variables in the Fornax Constellation ....................................... 1 - 4 2937 K.G. STRASSMEIER, S. WEICHINGER and A. HANSLMEIER: H-Alpha and LiI Observations of the RS CVn Type Binaries: Sigma Gem, Alpha Aur , 93 Leo and HR 6469 .......... 1 - 6 2938 G. VIRAGHALMY: Linear Polarimetric Measurements of 55 Cygni .......................................................... 1 - 2 2939 C. LAZARO and M.J. AREVALO: UBVRI Outburst of the Dwarf Nova AH Her ....................................................... 1 - 2 2940 C.E. LOPEZ and M.R. CESCO: The Proper Motion of the AGK3 Variable Stars II. SS Vir ......................................... 1 2941 K.M. NIELD, J. PRIESTLEY and E. BUDDING: UBV Observations of R Arae ............................................ 1 - 4 2942 P. MAYER, M. WOLF, MUMINOVIC and M. STUPAR: Period of the Eclipsing Binary V382 Cyg ........................... 1 - 4 2943 W.J. SCHUSTER and P.E. NISSEN: Possible Metal- Poor Variable Stars ............................................... 1 - 3 2944 T.S. POLUSHINA: Photometric Studies of the Eclipsing Variable V368 Cas ................................................. 1 - 4 2945 T.J. DAVIDGE: The Luminosity of the Eclipsing Binary HV 12714 and Its Membership in the LMC ............................ 1 - 2 2946 D.K. BEDFORD, J.J. FUENSALIDA and O. VILHU: The X-Ray Light Curve of XY Ursae Maioris ............................. 1 - 2 2947 W.P. BIDELMAN and H.L. GICLAS: New Data on V503 Sagittarii ........................................................ 1 - 2 2948 R. HUDEC: Possible Optical Counterpart to the GRBS 1979 March 25B (1810+31) .......................................... 1 - 2 2949 W. STRUPAT and C. BOEHM: Detection of a Satellite Line System in High-Dispersion Spectra of the Beta Lyrae Type Binary HD 72754 ................................................... 1 - 4 2950 G.C. KILAMBI, P. VIVEKANANDA RAO and M.B.R. SARMA: Variability of Be Stars ........................................... 1 - 4 2951 P.B. BYRNE: Large Amplitude Spot Variations on II Peg ............. 1 - 4 2952 J.A. EATON and S.C. BARDEN: The Rotational Velocity and Mass Ratio of 5 Ceti .............................................. 1 - 4 2953 S.GULMEN, N. GUDUR and C. SEZER: Photoelectric Photometry of UZ Dra ......................................................... 1 - 4 2954 M.K. TSVETKOV, K.P. TSVETKOVA and N.D. MELIKIAN: Flare Observations of EV Lac ...................................... 1 - 4 2955 W. GOTZ: Optical Behaviour of the Polar ST Leonis Minoris = CW 1103+254 in 1986 ............................................... 1 - 2 2956 H.M. AL-NAIMIY, H.A. FLEYEH, A.O. AL-SIKAB and J.M. AL-RAZZAZ: New Photoelectric Observation of W UMa System 44i Bootis ............................ 1 - 3 2957 Z. KVIZ and F. RUFENER: New Ephemeris and Light Curve of CF Pup ......................................................... 1 – 3 2958 E. ANTONELLO, L. PASTORI and E. PORETTI: Beta Cas : A Probable Small Amplitude Mono- periodic Delta Sct Star ........................................... 1 - 2 2959 V. REGLERO, J. FABREGAT and A. DE CASTRO: Stromgren uvby-H_beta Photometry of the Solar Type Stars HD 152391 and HD 154417 ................................ 1 - 4 2960 D.RAIKOVA and A. ANTOV : UBV Observations of T Coronae Borealis ................................................ 1 - 2 2961 M. KUN: New and Neglected Variables in the Cepheus OB 2 Association .................................................. 1 - 4 2962 D. BOHME: Photoelectric Observations of R CrB ..................... 1 - 2 2963 M.A. HAMDY, H.A. MAHDY and M.A. SOLIMAN: On the Period Variation of YZ Boo ................................. 1 - 3 2964 M.A. SOLIMAN, M.A. HAMDY and H.A. MAHDY: A New Period Change of SW Lacertae ................................ 1 - 2 2965 J. PAPOUSEK: Photoelectric Observations of Theta CrB in 1984-86 ........................................................ 1 - 4 2966 R. BONINSEGNA: First Ephemeris for the W UMa- Type Star NSV 12040 ............................................... 1 - 4 2967 W. GOTZ: Optical Behaviour of the Polar AM Her in 1985 ........................................................... 1 - 3 2968 I.L. ANDRONOV, B. FUHRMANN and W. WENZEL: Two- Colour Photometric Study of Nova Cygni 1986 ....................... 1 - 4 2969 O. DEMIRCAN: On the Coronal Activity of RS CVn Systems ........................................................... 1 - 3 2970 S.W. WACKER and E.F. GUINAN: The 1985/86 Light Curve of II Pegasi: Two Maxima of Unequal Brightness .............. 1 - 4 2971 G.A. RICHTER: V358 Lyr - a WZ Sagittae Star? ...................... 1 - 2 2972 M.K. TSVETKOV, A.P. ANTOV and A.G. TSVETKOVA: Photoelectric