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Commissions 27 and 42 of the Iau Information COMMISSIONS 27 AND 42 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 3801 - 3900 1992 November - 1993 June EDITORS: L. Szabados and K. Olah KONKOLY OBSERVATORY H-1525 BUDAPEST P.O. Box 67, HUNGARY HU ISSN 0374 - 0676 CONTENTS 3801 LSS 2854 AND LSS 2895: TWO REDDENED Beta LYRAE SYSTEMS D. Kilkenny, F. van Wyk, F. Marang, G. Roberts, K. Sekiguchi 4 November 1992 3802 THE VARIATION OF THE LIGHT CURVES OF AU Ser Li Zong-yun, Zhan Zhou-sheng, Li Yu-lan 5 November 1992 3803 NEW PHOTOELECTRIC MINIMA TIMES OF V505 SAGITTARII H. Rovithis-Livaniou, P. Rovithis 12 November 1992 3804 THE Halpha PROFILE VARIATIONS IN THE SPECTRUM OF HD 225094, B3 Ia A. Pasok, I. Kolka 12 November 1992 3805 MINIMUM TIMES FOR SEVERAL SOUTHERN EARLY-TYPE ECLIPSING BINARIES P. Mayer, H. Drechsel, R. Lorenz 13 November 1992 3806 FLICKERING ACTIVITY IN CH Cyg E. Kuczawska, M. Mikolajewski, K. Kirejczyk 18 November 1992 3807 Mu SERPENTIS: A DOUBLE-LINED SPECTROSCOPIC BINARY Grant Hill, Graham Hill, S.J. Adelman 18 November 1992 3808 THE PHOTOMETRIC RANGE OF EX Lupi: A CORRECTION TO IBVS 3755 G.H. Herbig, A.C. Gilmore, N. Suntzeff 18 November 1992 3809 A DETECTION OF RAPID INFRARED OSCILLATIONS IN HR 1217 = DO Eri P. Martinez, K. Sekiguchi 20 November 1992 3810 CCD PHOTOMETRY OF THE CATACLYSMIC VARIABLE HV VIRGINIS D. Ingram, P. Szkody 23 November 1992 3811 PERIOD REFINEMENT OF THE NEWLY DISCOVERED W UMa SYSTEM EF Dra E. Wunder, F. Agerer 23 November 1992 3812 RX Cam IS A SPECTROSCOPIC-BINARY CEPHEID L. Szabados 24 November 1992 3813 HD 54549: A NEW DOUBLE-LINED ECLIPSING BINARY Liu Qingyao, J. Andersen, J.V. Clausen, B. Nordstrom, R.P. Stefanik 26 November 1992 3814 TWELVE NEW OR UNDESIGNATED VARIABLES D.H. Kaiser 27 November 1992 3815 A PERIOD FOR THE NEW ECLIPSING BINARY DHK 29 = BD +33d4070 D.H. Kaiser, M.E. Baldwin 27 November 1992 3816 INVESTIGATION OF FOUR ERUPTIVE STARS ON SONNEBERG PLATES W. Wenzel 2 December 1992 3817 RENEWED ACTIVITY ON CH Cyg K.P. Panov, M.S. Ivanova 3 December 1992 3818 UBV LIGHT CURVE OF RT And FOR 1991 A. Dapergolas, E. Kontizas, M. Kontizas 9 December 1992 3819 A NEW EPHEMERIS FOR TX URSAE MAIORIS I. Todoran, R. Roman 18 December 1992 3820 Theta2 Sgr, NOT AN Am STAR D. Hoffleit 21 December 1992 3821 THE NEW PRIMARY MINIMUM OF OW Gem D. Hanzl, J. Papousek, D. Chochol, P. Pravec 21 December 1992 3822 NEW RAPID PHOTOMETRY OF BQ Cnc USING CCDs I. Vidal, J.A. Belmonte, E. Leung 4 January 1993 3823 PERIODIC LIGHT VARIATIONS IN TEN WEAK EMISSION T TAURI STARS IN TAURUS-AURIGA COMPLEX K.N. Grankin 4 January 1993 3824 MWC 560: DETECTION OF A PERIODIC COMPONENT IN THE LIGHT CURVE V.T. Doroshenko, V.P. Goranskij, Yu.S. Efimov 5 January 1993 3825 PHOTOGRAPHIC PHOTOMETRY OF V350 Cep E.H. Semkov 8 January 1993 3826 POSSIBLE VARIABILITY OF PLEIADES MEMBER HII 263 C.F. Prosser, J.R. Stauffer 11 January 1993 3827 NEW VARIABLE IN PERSEUS C.F. Prosser 11 January 1993 3828 PHOTOGRAPHIC OBSERVATIONS OF A NEWLY DISCOVERED INTERMEDIATE POLAR RE 0751+14 AND OF THE OBJECT OI 090.4 I.L. Andronov 15 January 1993 3829 ON THE NEW CATACLYSMIC VARIABLE STAR IN CRATER W. Wenzel 15 January 1993 3830 HD 28665: A PROBABLE DELTA SCUTI STAR C. Koen, G. Roberts 18 January 1993 3831 THE RATES OF PERIOD CHANGE IN BS Aqr AND DY Her Yang Dawei, Tang Quinguan, Jiang Shiyang, Wang Hongsheng 18 January 1993 3832 HR 8851 = HD 219586 IS A DELTA SCUTI STAR Hao Jinxin, Huang Lin 19 January 1993 3833 THE VARIABILITY OF BD +40d5040 D.B. Williams, B.A. Skiff 19 January 1993 3834 SPECTROSCOPY OF THE B[e] STAR HD 50138 (MWC 158) B.W. Bopp 19 January 1993 3835 A PHOTOELECTRIC LIGHT CURVE OF GR CARINAE E.J. Woodward, R.H. Koch 20 January 1993 3836 A FLARE EVENT ON THE A-TYPE STAR BD +47d819 Jun-Jie Wang 4 February 1993 3837 A NEW BRIGHT ECLIPSING VARIABLE IN CEPHEUS R. Grobel 4 February 1993 3838 UBVR LIGHT CURVES OF TY PYXIDIS W.H. Allen, E. Budding, M. Loudon, J. Priestley 4 February 1993 3839 NEW PROBABLE ECLIPSING BINARY GSC 1383_600 P. Pravec 9 February 1993 3840 THE 71st NAME-LIST OF VARIABLE STARS E.V. Kazarovets, N.N. Samus, V.P. Goranskij 11 February 1993 3841 SIMULTANEOUS PHOTOMETRY AND RADIAL VELOCITIES OF DELTA SCUTI L.N. Berdnikov, Yu.V. Kulagin, A.S. Rastorgouev, N.N. Samus 11 February 1993 3842 NSV 10848: A PROBLEMATIC STAR P. Maffei, G. Tosti 12 February 1993 3843 A NEW VARIABLE IN SAGITTARIUS G. Tosti 12 February 1993 3844 DISCOVERY OF RAPID OSCILLATIONS IN THE Ap STAR HD 42659 P. Martinez, D.W. Kurtz, R. Ashley 15 February 1993 3845 NO LONG-TERM VARIABILITY OF PG 0900+401 E. Kuczawska, M. Mikolajewski, K. Kirejczyk 22 February 1993 3846 G 172 - THE FOURTH HORIZONTAL BRANCH VARIABLE STAR BLUEWARD OF THE RR LYRAE GAP IN M4 Yao Bao-An 24 February 1993 3847 W Cru - A PHASE DIAGRAM L. Pazzi 24 February 1993 3848 RECENT UBVR MAGNITUDES FOR Rho Cas E.M. Halbedel 26 February 1993 3849 RECENT UBVR MAGNITUDES FOR HR 8752 = V509 Cas E.M. Halbedel 26 February 1993 3850 OPTICAL VARIABILITY AND H-alpha EMISSION FOR THE BRIGHT O STAR HR 2806 E.M. Halbedel 26 February 1993 3851 Tau Cas: A VARIABLE STAR AFTER ALL? E.M. Halbedel 26 February 1993 3852 LIGHT CURVE AND PERIOD OF THE SYSTEM V450 HERCULIS R. Grobel, G. Lichtschlag 1 March 1993 3853 TIME OF LIGHT MINIMUM OF BW VULPECULAE C. Sterken 2 March 1993 3854 THE PERIOD CHANGE OF RT Aur: AN UPDATE J.D. Fernie 2 March 1993 3855 NEW VARIABLE STARS IN CYGNUS, LYRA AND VULPECULA L. Dahlmark 8 March 1993 3856 NGC 2169-12, A PHOTOMETRIC AND SPECTROSCOPIC SILICON VARIABLE H.M. Maitzen, Th. Lebzelter 9 March 1993 3857 uvbybeta PHOTOMETRY OF THE NEWLY DISCOVERED PULSATING STAR HR 8851 Jinxin Hao, Lin Huang 12 March 1993 3858 SUSPECTED VARIABLE STAR NEAR V654 Her R.K. Konstantinova-Antova, A.P. Antov, M.M. Ivanov 16 March 1993 3859 A NEW ECLIPSING BINARY (Fr3 Cnc) P. Frank 16 March 1993 3860 THE DIFFERENTIAL EXTINCTION TOWARD NOVA CYGNI 1992 N.M. Elias II. 29 March 1993 3861 NEW PHOTOELECTRIC MINIMA TIMES OF V566 OPHIUCHI AND ITS PERIOD STUDY H. Rovithis-Livaniou, P.G. Niarchos, P. Rovithis 31 March 1993 3862 PHOTOGRAPHIC OBSERVATIONS OF NSV 1671 L.L. Chinarova, I.L. Andronov 31 March 1993 3863 PHOTOELECTRIC BVR OBSERVATIONS OF RR LYRAE STAR V381 Cyg L.N. Berdnikov 2 April 1993 3864 BVR OBSERVATIONS AND NEW ELEMENTS FOR THE CEPHEID FT Mon L.N. Berdnikov 2 April 1993 3865 PHOTOELECTRIC BVR OBSERVATIONS OF THE ECLIPSING VARIABLE HY Tau L.N. Berdnikov 2 April 1993 3866 WW VULPECULAE LIGHT VARIATIONS FOR 1929 TO 1992 C. Friedemann, J. Hoffrichter, H.-G. Reimann, J. Gurtler 5 April 1993 3867 BF DRACONIS R. Diethelm, M. Wolf, F. Agerer 14 April 1993 3868 PERIOD OF SV CENTAURI CONTINUES DECREASING H. Drechsel, R. Lorenz 14 April 1993 3869 IS V731 Sco AN RCB STAR? S. Paolantonio, J.H. Calderon 16 April 1993 3870 NEW VARIABLE STAR IN CEPHEUS E.H. Semkov 16 April 1993 3871 TIMES OF MINIMUM NEEDED FOR AR AURIGAE! B. Nordstrom, K.T. Johansen 20 April 1993 3872 SAO 189111 IN SAGITTARIUS IS AN ECLIPSING BINARY W.M. Kissling, G.L. Blow, A.C. Gilmore 23 April 1993 3873 IDENTIFICATION OF NSV STARS IN THE HUBBLE SPACE TELESCOPE GUIDE STAR CATALOGUE C.E. Lopez 27 April 1993 3874 NOTE ON THE INTERMEDIATE POLAR RE 0751+14 W. Wenzel 28 April 1993 3875 UBVR PHOTOMETRY OF THE ECLIPSING BINARY DK PERSEI M.M. Zakirov, A.A. Azimov 28 April 1993 3876 THE DISCOVERY OF APSIDAL MOTION IN THE BINARY SYSTEM Alpha CrB I.M. Volkov 4 May 1993 3877 CCD TIMES OF MINIMA OF FAINT ECLIPSING BINARIES J. Borovicka 6 May 1993 3878 A STUDY OF FOUR RED STARS S.Yu. Shugarov, A.V. Savenkov 13 May 1993 3879 A NEW VARIABLE STAR GSC 4383.0384 D. Hanzl, K. Hornoch, J. Kysely 13 May 1993 3880 UBVR OBSERVATIONS OF THE DOUBLE-MODE CEPHEID AS Cas L.N. Berdnikov 17 May 1993 3881 A NEW SEMIREGULAR VARIABLE STAR IN LYRA A.P. Katsyka, N.N. Samus 19 May 1993 3882 UNSUCCESSFUL SEARCH FOR AN OPTICAL COUNTERPART OF GRS 1915+105 W. Wenzel, E. Splittgerber, J. Greiner 20 May 1993 3883 A NEW CATACLYSMIC VARIABLE S 10930 IN LYRA W. Wenzel 20 May 1993 3884 COMPLETE BVRI LIGHT CURVES OF THE VERY SHORT PERIOD W UMa VARIABLE YZ PHOENICIS M.B. Arruda, R.G. Samec, D. Terrell 21 May 1993 3885 NEW ELEMENTS OF THE SMALL AMPLITUDE CEPHEID V1726 Cyg L.N. Berdnikov 27 May 1993 3886 ON THE PERIOD OF THE CEPHEID CI Per L.N. Berdnikov 27 May 1993 3887 WICH IS THE STAR V380 Per? P. Renson 28 May 1993 3888 18 ADDITIONAL HISTORICAL OUTBURSTS OF THE CATACLYSMIC VARIABLE J 05.23 M.L. Hazen 2 June 1993 3889 CARD CATALOGUE OF ECLIPSING BINARIES F.B. Wood 4 June 1993 3890 LONG-TERM LIGHT CURVE OF THE CATACLYSMIC X-RAY SOURCE 1ES1113+432 = AR URSAE MAJORIS W. Wenzel 7 June 1993 3891 PRECISION UBVRI OBSERVATIONS OF THE VERY SHORT PERIOD ECLIPSING BINARY BC GRUIS R.G. Samec, K. Becker 7 June 1993 3892 26 NEW Halpha EMISSION OBJECTS A. Piceno, C.
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