COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 701-800 1972 July – 1973 June EDITORS: L. DETRE AND B. SZEIDL, KONKOLY OBSERVATORY 1525 BUDAPEST, Box 67, HUNGARY CONTENTS 0701 MU Cas - NOT AN RRs STAR W. Wenzel 31 July 1972 0702 SPECTRAL CLASS AND METAL-ABUNDANCE INDEX DETERMINATION FOR 20 RR LYRAE STARS AT LIGHT MAXIMUM I.F. Alania 31 July 1972 0703 VARIATIONS D'ECLAT DE 3C 120 Ch. Bertaud, M.-P. Veron, C. Pollas 2 August 1972 0704 32 VIRGINIS: A PULSATING Am STAR C. Bartolini, F. Grilli, G. Parmeggiani 2 August 1972 0705 NEW SOUTHERN VARIABLE STARS D.H. Martins 3 August 1972 0706 PHOTOELECTRIC UBV MEASURES OF NOVA CEPHEI 1971 D.J. MacConnell, J.C. Thomas 4 August 1972 0707 THE OBSERVATION OF A STELLAR FLARE IN THE dM5 STAR ROSS 128 T.A. Lee, D.T. Hoxie 9 August 1972 0708 OBSERVATIONS OF THE PECULIAR EMISSION OBJECT HBV 475 N. Richter 11 August 1972 0709 VARIABLE COMPACT GALAXY OR SUPERNOVA IN A COMPACT GALAXY F. Zwicky 15 August 1972 0710 PHOTOELECTRIC SECONDARY MINIMA OF AK Her D.J. Killian, T.W. Edwards 19 August 1972 0711 PHOTOMETRY OF V1216 SAGITTARII A.H. Jarrett, J.P. Eksteen 31 August 1972 0712 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STARS BD +13d2618 AND BD +16d2708 G. Asteriadis, L.N. Mavridis 31 August 1972 0713 OBSERVATIONS OF THE EXTREMLY YOUNG STELLAR GROUP Lk Halpha 224 AND 225 W. Wenzel 11 September 1972 0714 THE R-I COLOR OF V1057 CYGNI BEFORE THE OUTBURST, AND ITS BRIGHTNESS AND SPECTRAL CHANGES G. Haro 12 September 1972 0715 NEW FLARE STARS IN THE PLEIADES REGION (A RE-EXAMINATION OF THE TONANTZINTLA PHOTOGRAPHIC MATERIAL: 1963-1970) G. Haro, G. Gonzalez 12 September 1972 0716 NEW FLARE STARS IN THE PLEIADES REGION (1971-1972) G. Haro, E. Chavira 12 September 1972 0717 58th NAME-LIST OF VARIABLE STARS B.V. Kukarkin, P.N. Kholopov, N.P. Kukarkina, N.B. Perova 21 September 1972 0718 NOTE ON THREE NEW RED VARIABLES P.N.J. Wisse, M. Wisse 21 September 1972 0719 NEW LIGHT ELEMENTS FOR V CRATERIS M. Parthasarathy, N.B. Sanwal 28 September 1972 0720 ON THE NATURE OF THE OPTICAL VARIATIONS OF HZ Her = Her X1 A.M. Cherepashchuk, Yu.N. Efremov, N.E. Kurochkin, N.I. Shakura, R.A. Sunyaev 29 September 1972 0721 PHOTOELECTRIC OBSERVATIONS OF V1216 Sgr DURING THE 1972 JULY 3-17 INTERNATIONAL PATROL S. Cristaldi, M. Rodono 29 September 1972 0722 PHOTOELECTRIC OBSERVATIONS OF V1057 AND V1329 Cyg H. Bossen 9 October 1972 0723 CONTINUOUS PHOTOELECTRIC MONITORING OF EV Lac DURING THE INTERNATIONAL PATROL, SEPTEMBER 1-15, 1972 B.N. Andersen, B.R. Pettersen 11 October 1972 0724 VARIABILITY OF BD -10d4662 CONFIRMED D. Hoffleit 12 October 1972 0725 NOVA IN LARGE MAGELLANIC CLOUD F.M. Bateson 13 October 1972 0726 NEW RESULTS ON KNOWN VARIABLES IN SAGITTARIUS D. Hoffleit 16 October 1972 0727 PHOTOELECTRIC UBV OBSERVATIONS OF CEPHEID VARIABLE BE MONOCEROTIS N. Buchancowa, W. Wisniewski, P. Kunchev 17 October 1972 0728 ANNOUNCEMENT E.E. Epstein 19 October 1972 0729 EIGHT NEW LONG PERIOD VARIABLES IN SAGITTARIUS D. Hoffleit 23 October 1972 0730 FLARE ACTIVITY OF Gl 669 A N.I. Shakhovskaya, W. Sofina 30 October 1972 0731 PHOTOELECTRIC OBSERVATIONS OF THE ECLIPSING VARIABLE U CORONAE BOREALIS S.N. Svolopoulos, S. Kapranidis 30 October 1972 0732 THE PHOTOMETRIC ACTIVITY OF RU Cam DURING THE YEARS 1970-72 P. Broglia, G. Guerrero 30 October 1972 0733 OPTICAL VARIABILITY OF Her X-1 (HZ Her) W. Wenzel, H. Gessner 30 October 1972 0734 TWO NEW PROBABLE SYMBIOTIC STARS WITH VARIABLE SPECTRA D.J. MacConnell 31 October 1972 0735 THE PERIODS OF SIX RR LYRAE STARS D. Hoffleit 3 November 1972 0736 OBSERVATIONS OF UV CETI DURING THE 1972 OCTOBER 1-15 INTERNATIONAL PATROL T.J. Moffett, B.W. Bopp 8 November 1972 0737 THE SECONDARY PERIOD OF RV CAPRICORNI S. Kanyo 14 November 1972 0738 S10764 - A SLOWLY VARIABLE OBJECT IN THE GLOBULAR CLUSTER M3 WITH U-B~- 1.0m L. Meinunger VISUAL OBSERVATIONS OF EV LACERTAE J.E. Isles 15 November 1972 0739 ON THE VARIABILITY OF THE MIRA STAR UX CYGNI T.J. Moffett, T.G. Barnes, III. 16 November 1972 0740 MINIMA OF ECLIPSING VARIABLES P. Flin 21 November 1972 0741 SPECTRAL CHANGES IN V1057 CYGNI G.F. Gahm, G. Welin 27 November 1972 0742 POLARIMETRIC OBSERVATIONS OF R CORONAE BOREALIS M.Ya. Orlov, M.H. Rodriguez 27 November 1972 0743 IDENTIFICATION OF THE CSV 6150 WITH A GALAXY N.E. Kurochkin 29 November 1972 0744 PROGRAMME OF COOPERATIVE FLARE STAR OBSERVATIONS FOR 1973 P.F. Chugainov A NON-EXISTENT SUSPECTED VARIABLE W.P. Bidelman, W.F. van Altena 11 December 1972 0745 NOTES ON BV 1481 = AA CETI R.H. Bloomer 12 December 1972 0746 EPOCHS OF PHOTOELECTRIC MINIMA OF Y CYGNI H. Ogata, T. Hayasaka, N. Sato, M. Koga, M. Kitamura 21 December 1972 0747 MHalpha 73-59 E. Splittgerber UV Cet K. Osawa, K. Ichimura, Y. Shimizu 27 December 1972 0748 OBSERVATIONS OF SOUTHERN FLARE STARS W.E. Kunkel 29 December 1972 0749 HBV 479-495, VARIABLES IN A FIELD AROUND SA 18 A.A. Wachmann 30 December 1972 0750 PHOTOELECTRIC SURVEILLANCE OF THE FLARE STARS YZ CMi, AD Leo AND EV Lac R.C. Kapoor, S.D. Sinvhal 30 December 1972 0751 LIGHT VARIATIONS OF 59 PISCIUM S.K. Gupta, A.K. Bhatnagar 30 December 1972 0752 12 NEW VARIABLE STARS IN NGC 6402 A. Wehlau, N. Potts 31 December 1972 0753 THE VARIATIONS OF THE LIGHT CURVE OF HZ HERCULIS IN THE 35-DAY CYCLE N. Kurochkin 5 January 1973 0754 ON TWO UNSTUDIED VARIABLE STARS IN ANDROMEDA. FI And = S 9498 AND FM And = S9504 V384 Cas H. Busch 5 January 1973 0755 MU Cas K. Haussler UY Mon H. Busch 5 January 1973 0756 28-SECOND OSCILLATIONS IN VW Hyi B. Warner, J.M. Harwood 17 January 1973 0757 PHOTOELECTRIC OBSERVATIONS OF 31 CYGNI IN THE 1972 ECLIPSE T. Hayasaka, N. Sato, H. Ogata, M. Kitamura 18 January 1973 0758 FLARES OF YZ CMi R.C. Kapoor 25 January 1973 0759 PHOTOELECTRIC OBSERVATIONS OF EV Lac DURING THE 1972 SEPTEMBER 1-15 INTERNATIONAL PATROL S. Cristaldi, M. Rodono 23 January 1973 0760 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR UV CETI DURING THE 1972 OCTOBER 1-15 INTERNATIONAL PATROL S. Cristaldi, M. Rodono 23 January 1973 0761 NEED OF PLANNED OBSERVATIONS OF MAGNETIC STARS C. Blanco, F.A. Catalano, G. Godoli, S. Vaccari 23 January 1973 0762 ON THE PHOTOMETRIC HISTORY OF V1329 CYGNI = HBV 475 V.P. Arhipova, O.E. Mandel 31 January 1973 0763 SY FORNACIS - NO U GEMINORUM STAR W. Wenzel 1 February 1973 0764 DEVELOPMENT OF A NEW 4-YEAR CYCLE IN THE 41-DAY PERIOD OF RR LYRAE L. Detre, B. Szeidl 6 February 1973 0765 NEW FAINT SOUTHERN VARIABLE STARS R. Knigge 7 February 1973 0766 SUSPECTED LONG-PERIOD VARIABLE NEAR NGC 2368 S. Wyckoff, P. Wehinger 8 February 1973 0767 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR YZ CMi DURING THE 1972-73 30 DECEMBER - 12 JANUARY INTERNATIONAL PATROL S. Cristaldi, M. Rodono 12 February 1973 0768 ON THE PERIOD LUMINOSITY RELATION OF MIRA TYPE VARIABLES K. Ferrari d'Occhieppo 13 February 1973 0769 THE PERIOD OF VARIABLE 7 IN M13 M. Ibanez, W. Osborn 22 February 1973 0770 CSV 2851: AN EMISSION-LINE, M DWARF STAR N. Sanduleak, C.B. Stephenson CORRECTION TO IBVS No. 749 A.A. Wachmann 23 February 1973 0771 NEW FLARE STARS IN THE PLEIADES W. Gotz 28 February 1973 0772 VISUAL OBSERVATIONS OF AD LEONIS J.E. Isles CORRECTED PERIOD FOR MT Her Z. Pokorny 8 March 1973 0773 A NEW VARIABLE STAR IN THE LMC WITHIN THE ERROR BOX OF THE X-RAY SOURCE LMC X1 A.D. Andrews 14 March 1973 0774 ON THE VARIABILITY OF Theta CORONAE BOREALIS E.S. Brodskaya 15 March 1973 0775 MINIMA OF ECLIPSING VARIABLES I. Todoran 15 March 1973 0776 NEW FLARE STARS IN THE PLEIADES REGION L. Pigatto 19 March 1973 0777 S10760 - A VERY DISTANT RR LYRAE-STAR TWO NEW VARIABLE EXTRAGALACTIC OBJECTS L. Meinunger 21 March 1973 0778 INVESTIGATION OF TWO DELTA SCUTI SUSPECTS A.K. Bhatnagar, S.K. Gupta 30 March 1973 0779 MINIMA OF ECLIPSING VARIABLES Z. Klimek 7 April 1973 0780 POLARIMETRY OF SELECTED SPECTROSCOPIC BINARIES R.J. Pfeiffer, R.H. Koch 12 April 1973 0781 LARGE POLARIZATION VARIATIONS IN CIT 6 A. Kruszewski 13 April 1973 0782 ON THE POLARIZATION VARIABILITY OF YY Eri V.A. Oshchepkov 17 April 1973 0783 A FLARE OF "ANTI-FLARE" STAR RZ Psc V.G. Karetnikov, A.F. Pugach 18 April 1973 0784 PHOTOELECTRIC OBSERVATIONS OF Beta ARIETIS H. Ogata 19 April 1973 0785 SUPERNOVA 1968 IN NGC 4975 R.G. Mnatsakanian 25 April 1973 0786 PHOTOGRAPHIC OBSERVATIONS OF ECLIPSING VARIABLES INSTANTANEOUS ELEMENTS OF 4 ECLIPSING STARS P. Ahnert 30 April 1973 0787 OPTICAL BEHAVIOUR OF FOUR QUASI-STELLAR OBJECTS W. Pfau 2 May 1973 0788 NEW FLARE STARS IN THE PLEIADES REGION (1972-1973) G. Haro, E. Chavira 2 May 1973 0789 MINIMA OF 44i BOOTIS I. Rudnick 9 May 1973 0790 AD Leo K. Osawa, K. Ichimura, Y. Shimizu, T. Okada, K. Okida, M. Yutani, H. Koyano 9 May 1973 0791 CONTINUOUS PHOTOELECTRIC PHOTOMETRY OF AD Leo DURING THE 1973 INTERNATIONAL PATROL B.R. Pettersen, B.N. Andersen 21 May 1973 0792 FIRST EPHEMERIDES OF FIVE VARIABLE STARS IN ERIDANUS AND FORNAX R. Deurinck, M. Goossens 22 May 1973 0793 PROVISIONAL EPHEMERIDES OF 21 VARIABLE STARS IN A FIELD CENTERED AT alpha= 13h delta= -70d R.