COMMISSION 27 OF THE I.A.U.

INFORMATION BULLETIN ON VARIABLE

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 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 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 S.N. Svolopoulos, S. Kapranidis 30 October 1972

0732 THE PHOTOMETRIC ACTIVITY OF RU Cam DURING THE 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 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- 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 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 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. Deurinck, B. Vissenberg 24 May 1973

0794 DISCUSSION OF 12 VARIABLE STARS IN A REGION AROUND alpha= 17h, delta= -70d R. Deurinck, B. Vissenberg 22 May 1973

0795 MINIMA OF ECLIPSING VARIABLES (XI) M.E. Baldwin 21 May 1973

0796 THE LARGE PERIOD VARIATION IN SS Cam EXPLAINED C.N. Arnold, D.S. Hall, R.E. Montle 21 May 1973 0797 A NOVA-LIKE VARIABLE STAR B.S. Whitney 24 May 1973

0798 CONCERNING A SUSPECTED VARIABLE STAR IN M13 W. Osborn, M. Ibanez 25 May 1973

0799 THE NON-EXISTENCE OF NOVA CARINAE 1970 D.J. MacConnell 26 May 1973

0800 OBSERVATIONS OF W COMAE BERENICES D. Hoffleit V343 Ori - NEW ELEMENTS R. Szafraniec 2 June 1973