PAGE i R C O R O N A E B O R E A L I S L I G H T C U R V E S 1 9 9 1 - 1 9 9 5 AAVSO MONOGRAPH 4 SUPPLEMENT 1 This monograph is dedicated to Charles A. Fausel in recognition of his service and contributions to the Association. Prepared by Janet A. Mattei Elizabeth O. Waagen E. Grant Foster Funds for preparation and publication provided by Charles A. Fausel Clinton B. Ford Additional funds provided by AAVSO Members International Astronomical Union (IAU) ------------------------------------------------------------------------------ PAGE ii ISBN 1-878174-17-7 COPYRIGHT 1996 by the American Association of Variable Star Observers 25 Birch Street Cambridge, Massachusetts 02138 USA All rights reserved. All commercial use of any part of this book requires the written permission of the AAVSO. All non-commercial use by individuals and educators is granted without restriction. ------------------------------------------------------------------------------ PAGE iii TABLE OF CONTENTS Introduction v Observers of R Coronae Borealis vii Information on R Coronae Borealis x Key to Symbols x Light Curves of R Coronae Borealis, 1991 - 1995 1 ------------------------------------------------------------------------------ PAGE iv is blank ------------------------------------------------------------------------------ PAGE v R CORONAE BOREALIS LIGHT CURVES, 1991 - 1995 Introduction AAVSO long-term light curves of variable stars contain crucial information that has a significant bearing on many outstanding questions in astrophysics. These light curves define the behavior of variable stars and provide basic sets of observations for multiwavelength data correlation, data analysis, and for checking theories and matching models. The monograph format enables us to present long-term variable star behavior, with each Monograph containing 20 or more years of computer-generated light curves on one star. Each Supplement to a Monograph continues the light curves of the same star, bringing them more up-to-date. R Coronae Borealis Light Curves, 1991 - 1995 AAVSO Monograph 4, Supplement 1, contains light curves of R Coronae Borealis from 1991 through 1995 (JD 2448258 - 2450083). Pages 1 through 3 contain computer-generated light curves with each dot representing one observation. Observations are plotted Julian date versus magnitude, and the start of each year (January 1) is indicated along the upper axis. A scaled grid is provided to assist in determining the exact date and magnitude of any data point. Factual information on R Coronae Borealis and a Key to Symbols are given on page x. Earlier observations of R Coronae Borealis have been published in AAVSO Monograph 4, R Coronae Borealis Light Curves 1843 - 1990. The observations in AAVSO Monograph 4, Supplement 1, are the contributions of AAVSO members or observers in the United States and abroad. 514 observers have contributed 27,069 observations to these light curves, and their names and observer codes are given on pages vii through ix. Organizations whose members have contributed observations to the AAVSO either individually or through their organization are listed on page ix. In preparing the data for publication, each observation was evaluated for accuracy by my senior technical assistant Elizabeth O. Waagen, and by me. Software used in evaluating and plotting the observations was developed by my technical assistant E. Grant Foster. The observations from 1991 through 1995 included in this supplement have been preserved on compact disc, cartridge, and printout. Electronic, diskette, or printout copies of observations for further analysis may be obtained by writing or sending email to the AAVSO Director at aavso@aavso.org. The data may also be retrieved for personal use (not for publication or distribution) from the AAVSO's ftp site: ftp.aavso.org (198.116.78.2) in /pub/monographs, or its home page: http://www.aavso.org. Acknowledgements We dedicate AAVSO Monograph 4, Supplement 1, to Charles A. Fausel, who has contributed generously to the preparation of the AAVSO monographs and supplements. We extend our sincere thanks to him. We remember with special thanks Clinton B. Ford for his very generous contribution for the preparation of this and subsequent monographs and monograph supplements. Our sincere thanks go to AAVSO members and friends for their contributions to prepare and publish these monographs and monograph supplements. v ------------------------------------------------------------------------------ PAGE vi We thank the International Astronomical Union (IAU) for their support of our monograph series and for the grant provided to the AAVSO to publish this and other monographs and monograph supplements. We gratefully acknowledge the support provided through National Science Foundation Grant AST 7910576 for computerization of a portion of the data in this monograph supplement. We acknowledge with thanks the computer support of the Smithsonian Astrophysical Observatory for preservation of the data. The evaluation of the data and the preparation of this monograph supplement were accomplished using the computer facilities at AAVSO Headquarters. This computer hardware was purchased through grants from the National Aeronautics and Space Administration (grant awards NAGW 1493 and NAG 5-1459), the Kenilworth Fund, and the Theodore H. Dunham Fund for Astrophysical Research. We gratefully acknowledge these grants. Many AAVSO assistants helped in the preparation of the data for publication. My special thanks go to Elizabeth O. Waagen for her careful evaluation of the observations and plotting the light curves, and to E. Grant Foster, for developing the computer programs for the IBM-PC compatible MS-DOS computers at AAVSO Headquarters to evaluate, plot, and prepare the data for publication. Robert S. Hill, Charles M. Jones, and Richard J. Strazdas assisted in the initial development of the computer programs to manage the large volumes of data. Barbara Silva, Donna Eldridge, Douglas Van Orsow, Young Lim, Bethune Kelly, Michael Bickford, and several other student-assistants have helped in making the data computer-readable. The dedication, the many, many hours of observing, and the untiring efforts of our observers in pursuit of contributing to variable star astronomy have made this publication possible. Our very sincere thanks and gratitude go to them for their valuable astronomical contributions. Janet Akyuz Mattei Director Cambridge, Massachusetts April 1996 vi ------------------------------------------------------------------------------ PAGE vii CONTRIBUTORS TO AAVSO DATA ON R CORONAE BOREALIS 1991 - 1995 AAP ABBOTT, A. PATRICK 104 | CMG COMELLO, GEORG 63 | AMT ADAMS, MARK T. 150 | CK COOK, STEPHEN P. 1 | AJO AFONSO, JOSE 12 | CMK COUCHE, MICHAEL G. 1 | AB ALBRECHT, WILLIAM 484 | COA COULOMBE, ANDRE 2 | ALN ALLISON, RUDIE J. 4 | CWD COWALL, DAVID E. 15 | AMO AMORETTI, MAURO 3 | CR CRAGG, THOMAS A. 25 | AJ ANDERER, JOSEPH A. 39 | CFL CRUZ NICOLAU, FLORENCIO 6 | AEJ ANDERSON, ERIC 32 | CJK CSANYI, JANEK 6 | ALM ANDERSON, LYNN M. 3 | CSM CSUKAS, MATYAS 25 | AJR ANDRESS, J. ROBERT 11 | CCO CUBILLO, CARLOS F. 1 | ARQ ARQUIER, BERNARD 4 | CDT CURRIER, DEWAYNE T. 6 | AKT ATKIN, TIMOTHY W. 14 | DAH DAHLE, HAAKON 109 | AJM AZEMA, JEAN-MARIE 3 | DMI DAHM, MICHAEL 18 | BBJ BAAB, JOHANN 3 | DAJ DAVIS, JACK F. 2 | BVE BALLEGOY, E. V. 2 | DEX DE SAN RAMON GARCIA, ELENA 1 | BIV BALOGH, ISTVAN 87 | DQM DECLERCQ, MIQUEL 1 | BXA BARANSKI, ALEXANDER 17 | DJO DEJONG, J. 4 | BSR BARONI, SANDRO 167 | DEK DEQUICK, KURT 15 | BXR BARRY, RON 11 | DNO DEREN, OSCAR A. 81 | BNX BASTOS, NUNO F. 19 | DTE DESLIJPERE, TOMMY 53 | BNY BENGE JR., RAYMOND 16 | DIZ DIAZ, JUAN 4 | BTY BENNER, TERRY 89 | DPA DIEPVENS, ALFONS 185 | BEB BERG, RAYMOND 138 | DMN DIERICK, DOMINIQUE 2 | BIO BERRIOT, PIERRE 2 | DLA DILL, ALBERT G. 94 | BVA BERVALD, ASSAF 97 | DIL DILLON, WILLIAM G. 226 | BIC BICHON, LAURENT 63 | MDS DIONISI, MASSIMO 1 | BMM BIESMANS, MARC 41 | DKT DOLP, KATALIN 2 | BIL BILODEAU, GERALD A. 1 | DPL DOMBROWSKI, PHILIP 163 | BIS BISSANTZ, NICOLAI 7 | GDB DOMENY, GABOR 2 | BGI BLASCO GIL, GONZALO 3 | DZS DOMINGUEZ, SERGIO 20 | HUO BLOOM, DONNA J. 10 | DZM DONZEL, MARC 3 | BAX BOATTINI, ANDREA 52 | DKI DRUCSKO, ISTVAN 11 | BOH BOHME, DIETMAR 99 | DUS DUBOIS, ROBERT 1 | BOE BOREL, JAMES 25 | DMB DUENAS BECERRIL, MARTA 4 | BEC BORN, ECKHARD 10 | DMO DUMONT, M. 298 | BRJ BORTLE, JOHN E. 199 | DUP DUPASQUIER, PAUL 3 | BNQ BOSA, NORA 2 | DGP DYCK, GERALD P. 487 | BJB BOSCH, JEAN-GABRIEL 41 | EKR EDES, KRISZTIAN 2 | BMU BOUMA, R. J. 178 | ELD ELIAS, DEMETRIUS P. 1 | BPI BOURRET, PIERRE 21 | EM EMERSON, GARY P. 1 | BDT BRANCHETT, DAVID W. 130 | EPE ENSKONATUS, PETER 183 | BAQ BRAS, ANTONIO 3 | EJO ERDEI, JOZSEF 18 | BNW BRAUNE, WERNER 3 | EEM ESZENYEI, EMESE 2 | BDL BRESLIN, DANIEL 1 | FMA FADDA, M. 40 | BHA BRETSCHNEIDER, HARTMUT 53 | FJH FEIJTH, HENDRIK 33 | BSM BRINCAT, STEPHEN M. 32 | FKJ FEKETE, JANOS 329 | BKF BROCKMEIER, FRANK 8 | FJM FERNANDEZ, JOSE 12 | BOS BROENS, ERIC 131 | FRF FIDRICH, ROBERT 262 | BJQ BROOKS, JOHN J. 4 | FSJ FIS, JEAN-LOUIS 1 | BBT BROWNING, ROBERT R. 36 | FTE FISHER, TERRY 1 | BYV BRUCHER, YVON 29 | FEM FLYNN, EDWARD M. 10 | BHC BRUHN, CARL 2 | FAT FODOR, ATTILA 18 | BOA BRUNO, ALAIN 1 | FDC FODOR, FERENC 1 | BJY BRYDGES, JEFFREY D. 15 | FSE FOGLIA, SERGIO 81 | BTH BURROWS, THOMAS A. 30 | FFC FOLDESI, FERENC 45 | BFS BUTLER JR., JAMES 3 | FMR FONOVICH, MARINO 9 | CBA CABRERA RODRIGUEZ, ANGEL 6 | FTJ FOULDS, TANJA J. 2 | CMP CAMPBELL, RICHARD 14 | FBM FOX, BRENT M. 44 | CFN CAMPOS, FRANCISCO 39 | FMC FRANGEUL, MICHEL 68 | CAT CASTANO, JOSE GOMEZ 19 | FML FRIDLUND, MALCOLM 1 | CNT CHANTILES, DEAN 24 | FAA FROSINA, ANGELO 5 | CGF CHAPLE JR., GLENN 51 | GMB GABLE, MARK 85 | CLH CLAES, JOHAN 2 | GBZ GABZO, OFER 562 | CLK CLARK, WAYNE E. 24 | GEC GALE, EUGENE C. 98 | CWP CLARKE, WILLIAM P. 48 | GJQ GARCIA, JUAN M. 9 | CLG CLUYSE, LUDWIG 1 | GPA GARCIA, PACO 1 | CKH COECKELBERGHS, HANS 1 | GAA GAREY, PATRICK 4 | CNL COLE ARNAL, OSCAR 173 | GKR GECKELER, RALF 30 | COL COLLINS, PETER L. 408 | GJN GENSLER, JAN 7 | CME COLOMBO, EMILIO 72 | GLN GILLAIN, JEAN-MARIE 4 | GGT GLENN, GARY 4 GHA GOLDHAHN, HARTMUT 164 GIN GOMEZ, INMACULATA 13 GJZ GOMEZ, JUAN 1 GDV GONZALEZ ROJAS, DAVID 3 GNI GONZALEZ, NICOLAS 7 GOP GOODWIN, PAUL N. 18 GRL GRANSLO, BJOERN H. 192 GRI GRIESE III, JOHN W. 3 GOC GROCHOWSKI, RADOSLAW 121 GUB GUBBELS, GUIDO 57 GHD GUIDRY, HOWARD 1 GUN GUNTHER, JEAN 86 GYP GYENIZSE, PETER 3 HAX HAASZ, ALEXA 1 HCS HADHAZI, CSABA 168 HTY HAGER, TIMOTHY 64 HJT HAJDU, ATTILA 2 HK HALBACH, EDWARD A. 2 HTT HALLETT, PETER 9 HMG HALMI, G. 14 HMR HAM, RONALD 1 HP HAMPTON, WALTER R. 2 HAN HANNON, JAMES 39 HSG HANSON, GENE 104 HDC HARPER, DAVE C. 3 HAV HARVAN, RICHARD P. 34 HBL HASSFORTHER, BELA 73 HDO HAVASSY, DORA P. 3 HAB HAYS JR., ROBERT H. 126 HLS HEEN, LARS TROND 26 HEF HEIFNER, MARK A. 73 FYE HEIRONIMUS, ELIZABETH FREY 19 HYN HENRY, NAOMI 1 HEN HENSHAW, COLIN 13 HVM HEVESI, MONIKA 2 HRQ HEVESI, ROBERT 1 HEV HEVESI, ZOLTAN 30 HJR HEVESI JR., ZOLTAN 7 ZSO HIDI, ZSOLT 4 HE HIETT, F. LANCASTER 222 HWD HODGSON, WILLIAM D. 1 HAH HOFFMANN, ANDREA 1 HLT HOLTER, GREGORY M. 1 HZJ HOLTZ, JOHN WILLIAM 9 HRB HORNBY, PETER W. 58 HFE HORVATH, F. 2 HPE HORVATH, PETER 1 HSR HOSTE, SERGE 4 HAQ HOUNVAI, ANTOL 5 HVA HOUVENAEGHEZ, ALAIN 5 HUT HUNTER, TIMOTHY 31 HUR HURST, GUY M. 69 IML IDEM, MICHAEL 141 ILS ISLES, JOHN E. 2 JCA JACINTO, CARLOS 2 JTP JACQUET, PIERRE 41 JQL JACQUIER, LUDWIG 1 JEZ JAMBOR, ESZTER 3 JM JAMES, ROBERT A. 12 JGA JANKOVICS, GABOR 2 JAJ JANSSENS, JAN 11 JLT JENSEN, LASSE TEIST 84 JRJ JOHANNS, R. J. 18 JON JONCKHEERE, KURT 34 JSZ JOZSA, SANDOR 31 JRU JUAN, R. R. 5 KAP KALOCZY, PETER 14 KB KAMINSKI, WALTER J. 154 KID KAPUS, ILDIKO 1 vii ------------------------------------------------------------------------------------------------------------------ PAGE viii CONTRIBUTORS TO AAVSO DATA ON R CORONAE BOREALIS (continued) 1991 - 1995 KAK KERESZTURI, AKOS 54 | MAV MATSNEV, DMITRY V. 1 | KZB KESZTHELYI, BERNADETT 8 | MPR MAURER, PETER 19 | KZD KESZTHELYI, DANIEL 25 | MGE MAVROFRIDIS, GEORGE 22 | KSZ KESZTHELYI, SANDOR 4 | MYR MAYER, ERNST H. 24 | KRB KING, ROBERT P. 76 | MJW MAYER, JAY W. 86 | KIL KISS, LASZLO 195 | MKJ MCKENNA, JEROME F. 57 | KPE KLIX, PETRA 7 | MED MEDWAY, KENNETH J. 611 | KGT KNIGHT, GEORGE 44 | MHI MENALI, HALDUN I. 4 | KSP KNIGHT, STEPHEN P. 93 | MJL MENDEZ-ALVAREZ, JAVIER 1 | KS KNOWLES, JEREMY H. 123 | MNZ MENEGUZZO, ENZO 2 | KOC KOCSIS, ANTAL 53 | MMY MEYER, MAIK 24 | KDF KOCYLA, DENNIS F. 16 | MDI MIDDLEMIST, IAN A. 50 | KHL KOHL, MICHAEL 113 | MSF MINARDI, STEFANO 3 | KRS KOLMAN, ROGER S. 114 | MZS MIZSER, ATTILA 206 | KMA KOMOROUS, MIROSLAV 279 | MCE MOCHIZUKI, ETSUIKU 16 | KYA KONYA, ANDRAS 6 | MRV MODIC, ROBERT J. 137 | KOS KOSA-KISS, ATTILA 150 | MMI MOELLER, MICHAEL 422 | KOA KOSHIRO, MASAMI 2 | MOL MOLNAR JR., JAMES 11 | KNO KOSKAS, NICOLAS 1 | MOZ MOLNAR, ZOLTAN 1 | KTD KOUTSOTHEODORIS, THEODOR 4 | MJ MONTAGUE, ALLEN C. 30 | KVI KOVACS, ISTVAN 29 | MF MONTAGUE, FREDERICK 4 | KRQ KRAJCZ, ROBERT 1 | MMO MONTESDEOCA, MOISES 1 | KZZ KRANICZ, Z. 5 | MLE MORO, LEOPOLDINA 10 | KWO KRIEBEL, WOLFGANG 92 | MOW MORRISON, WARREN C. 155 | KRN KRIEK, NICO 5 | MDU MULINSKI, DANIEL 2 | KIS KRISCH, GUNTHER 486 | MNS MUNIER, SERGE 3 | KRK KRISCIUNAS, KEVIN 3 | NAG NAGY, GABOR 87 | KJI KRTICKA, JIRI 43 | NZO NAGY, ZOLTAN 115 | KRU KRUTA, JAROSLAV 17 | NMA NAGY-MELIKUTI, AKOS 11 | KBP KUBICEK, PAVEL 12 | NMS NALL, MARK S. 102 | KSA KUCINSKAS, ARUNAS 2 | NJO NEUMANN, JORG 34 | KGR KUTROVACZ, GABOR 3 | NKN NISHIMURA, KEENAN 1 | LAR LAMBERT, RANDY 9 | NBY NORDBY, JOHN M. 71 | LGU LAMBRECHTS, GUY 10 | NTS NORTON, THOMAS S. 6 | LTO LANGE, THORSTEN 6 | NVK NOVAK, MICHAEL 28 | LZL LANTOS, ZSOLT 2 | NOG NOWAK, GARY 17 | LMF LARA, MARCO F. 14 | ONY NYIRO, OTTO 2 | LKG LARSON, KEVIN GARY 21 | OCN O'CONNOR, STEPHEN 34 | LVA LAUVSTAD, ANDREAS 12 | ONJ O'NEILL, JOHN G. 4 | LVH LAVERGE, HANNELORE 3 | OER OFEK, ERAN 235 | LZT LAZUKA, THOMAS 79 | OBD OPPENHEIMER, BENJAMIN D. 4 | LMA LE MAY, DAMIEN 2 | OV ORAVEC, EDWARD G. 196 | LST LECOMTE, S. 4 | OJR OSORIO, JOSE RIPERO 275 | LBR LEMBREE, ROBERT 2 | OSV OSVALD, LASLO 33 | LNZ LENZ, GEORGE F. 35 | OCR OTTEN, CHRETIEN 23 | LGE LETELLIER, GEORGES 33 | PLA PADILLA FILHO, ANTONIO 125 | LOB LOBO-RODRIGUEZ, J. 5 | PCA PAP, CSABA 7 | LRZ LORINCZ, MIKLOS 12 | PCC PAPINI, RICCARDO 5 | LRD LORING, DANIEL P. 61 | PPS PAPP, SANDOR 490 | LML LOU, MANUEL 1 | PPI PASSCHYN, PIETER 3 | LHR LOURENCO, HELIO 15 | PAK PATAK, AKOS 1 | LVT LOVETT, JAMES 217 | PN PEARLMUTTER, ARTHUR 7 | LTB LUBBERS, THOMAS F. 161 | PEG PEGUET, CLAUDE 16 | LBG LUBCKE, GILBERT C. 191 | PMR PERALA, MARTTI R. 50 | LFZ LUCIDI, FABRIZIO 5 | PAE PEREIRA, ALFREDO J. 24 | LDY LUKACSY, DOROTTYA 2 | PML PERROT, MICHEL 1 | LRE LUNSFORD, ROBERT 3 | POD PESTANA-GALVAN, D. 1 | LBB LUX, BARBARA A. 6 | PGY PETER, GYORGY 1 | MJY MACQUARRIE, JEFFREY 1 | PJD PETERFALVI, JUDIT 4 | MMS MAES, MICHA 2 | PKI PIECHOWSKI, OTTO R. 11 | MLI MAISLER, LEE 89 | PTZ PIETZ, JOCHEN 117 | MKE MANSKE, ROBERT P. 21 | PEY PIGGOTT, EDWARD J. 5 | MJZ MANZORRO, JUAN 52 | PFU PINEAU, FRANCOIS 5 | MCO MARCARIO, MIKE 18 | PBE PIOLON, BENGT 18 | MIC MARILLER, C. 25 | PIJ PIRITI, JANOS 13 | MTB MARONICS, TIBOR 6 | PLR POOLE, RANDALL M. 8 | MXR MARTIN, RUSSELL R. 9 | PZS PORHANDA, ZSOLT 16 | MJH MARTINS, JOSE 3 | PWR POWASKI, RONALD 1 | MYA MASSEY, ANDREW 2 | PYG POYNER, GARY 187 | MAQ MATIS, ANDRAS 6 | PPR PRESITS, PETER 1 | PRI PRICE, LELAND 10 PDQ PROUST, DOMINIQUE 27 PUJ PUJOL, FRANCISCO 6 QPF QUINN, PETER F. 2 RAA RAASCH, RICHARD W. 2 RKE RAETZ, KERSTIN 48 RKM RAETZ, MANFRED 50 RRB RAPHAEL, ROBERT B. 19 RCQ RECSEK, RENATA 2 REP REINHARD, PETER 74 RPR ROBBINS, PHILLIP 22 RJN ROCHEFORT, JULIEN 15 RZD RODRIGUEZ, DIEGO 2 RSO RODRIGUEZ SANTANA, ORLANDO 1 RGB ROSENBERG, GEORGE B. 6 RGL ROTEM, GILAD 45 RR ROYER, RONALD E. 39 RVR RUIZ RUIZ, VICTOR 6 SLX SAILLOL, ALEXANDRE 10 SQV SAINZ, JAVIER 4 SJQ SAJTZ, ANDRAS 187 SSU SAKUMA, SEI-ICHI 172 SLU SALAS, LUIZ 1 SEQ SALAZAR, ERWIN 14 SXA SALEADO MORENO, ALEJANDRO 1 SAY SANABRIA, ANTONIO 1 SEF SANCHEZ, FLORENTINO 8 SCU SANTANA, CAYETANO 1 SGI SANTOS, MIGUEL 30 SPQ SAPI, CSABA 33 SGU SARI, GYULA 4 SKI SARNECZKY, KRISTIAN 42 SGE SARTY, GORDON 13 SGN SCHEMBRI, GLENN 1 SPK SCHMEER, PATRICK 87 SAQ SCHOLTEN, A. 4 SOY SCHRAMM, OTTO 5 SWX SCHWARTZ, TOD 8 SCZ SCHWEITZER, EMILE 172 SCE SCOVIL, CHARLES E. 27 SRZ SERES, ZSOLT 2 SHS SHARPE, STEVEN B. 146 SSA SHARPLESS, ALBERT 3 SHQ SHEMMER, OHAD 118 SHW SHERMAN, WILLIAM R. 233 SIH SILHOL, MAX 75 SNE SIMMONS, NEIL A. 79 SKP SKALAK, PETR 67 SDU SMITH, DOUGLAS 17 SJO SMITH, JOHN E. 4 SSZ SOOS, ZOLTAN 12 SC SPRATT, CHRISTOPHER 44 STR STANTON, RICHARD H. 1 SVD STEBLINA, VLADIMIR 28 STF STEFANOPOULOS, GEORGE 18 STI STEFFEY, PHILIP C. 134 SET STEPHAN, CHRISTOPHER 143 SWT STEWART, ROBERT J. 198 SQA STROBBE, JAN 22 SHZ STRUEVER, HELMUT 14 SAX STUDER, ALFRED J. 2 SUK STUKA, MICHAEL T. 2 SUX SUAREZ, MAXIMO 58 SUS SUSSMANN, DIETER 34 SVN SVENTEK, PAUL L. 30 SWV SWANN, DAVID 90 SSW SWIERCZYNSKI, STANISLAW 79 SDX SWORIN, DAVID J. 15 SSH SZABO, GABOR 4 SIZ SZABO, RITA 11 viii ------------------------------------------------------------------------------------------------------------------ PAGE ix CONTRIBUTORS TO AAVSO DATA ON R CORONAE BOREALIS (continued) 1991 - 1995 SBT SZABO, ROBERT 241 | TTK TOTH, KRISZTIAN 131 | SSI SZABO, SANDOR 7 | TTH TOTH, TAMAS 16 | SZW SZAJ, ROBERT 9 | TSC TRACY, SCOTT 12 | SXP SZAKAL, P. 4 | TDM TROIANI, DANIEL M. 48 | SZX SZALMA, ZSOLT 1 | UAN UHRIN, ANDRAS 1 | SKV SZARKA, LEVENTE 34 | UCA UNREIN, CHRIS 31 | SAO SZAUER, AGOSTON 23 | VFR VACLIC, FRANTISEK 31 | SLY SZEGEDI, LASZLO 10 | VLN VADROT, LAURENT 15 | SNO SZENTASKO, LASZLO 422 | VBR VAN BEMMEL, HENRI 14 | SZK SZITKAY, GABOR 12 | VDE VAN DIJK, E. 13 | SFZ SZOKE, FERENC 1 | VNL VAN LOO, F. R. 132 | SOO SZOLLOSI, ATTILA 18 | VWS VAN WASSENHOVE, JEROEN 5 | SUZ SZUTOR, PETER 1 | VDH VANDENHIL, H. 40 | TAM TALERO, MANUEL 1 | VDL VANDERLOOY, JOHAN 113 | TAI TARNAI, MIHALL 1 | VDJ VANDIJK, J. F. H. 48 | TPI TASSIE, PIERRE 1 | VHD VANHESSCHE, DIRK 23 | TDB TAYLOR, DANIEL 315 | VMT VANMUNSTER, TONNY 311 | TSZ TEICHNER, SZILARD 2 | VGA VARGA, BALINT 9 | TBA TEKATCH, BARBARA ANN 26 | VZS VARGA, ZSAZSA 1 | TJV TEMPRANO, JAVIER 22 | VED VEDRENNE, PAUL 671 | TPH TENGG, PHILLIP 1 | VMA VELASCO, MARIANO 2 | TPS TEPLICZKY, ISTVAN 44 | VET VERDENET, MICHEL 361 | TBD THIBEAULT, DORIS 1 | VIA VIALLE, JACQUES 4 | TMR THOMAS, RONALD P. 1 | VNZ VICIAN, ZOLTAN 47 | THR THOMPSON, RAYMOND 39 | VRA VIEIRA, JOAO 2 | THU THOUET, BERNARD 72 | VJF VIENS, JEAN-FRANCOIS 1 | TJO TOBIN, JOHN 2 | VIO VIGH, IMOLA 2 | TMB TOMBELLI, MAURA 188 | VGP VIGNIER, PHILLIPE 14 | TST TOOTHMAN, STEVEN A. 6 | VJV VILLAREAL, JAVIER 1 | TRT TORDAI, TAMAS 56 | VII VINCZE, IVAN 33 | TTE TOTH, EVA 1 | VFK VOHLA, FRANK 128 | TGO TOTH, GABOR 2 | VJS VOJTECH, SIMON 22 | VOL VOLLMANN, WOLFGANG 93 VVI VOROSHAZI, VILLO 4 WEO WAAGEN, ELIZABETH O. 1 WKP WALKER, PAUL 70 WRS WATT, RICHARD S. 4 WER WEBER, RICHARD J. 38 WPU WEEKS, PAUL 4 WEI WEIER, DAVID D. 412 WJU WEIER, JOSHUA D. 8 WC WEND, RICHARD E. 268 WET WESELAK, TOMESZ 17 WEM WESOLOWSKI, MIKE 1 WEJ WEST, E. JAMES W. 67 WEF WEST, FREDERICK R. 735 WDM WESTLUND, MARGARETA 3 WTK WIESZT, KRISTIEN 25 WI WILLIAMS, DAVID 57 WJY WILMS, JOHNNY 16 WLP WILS, PATRICK 18 WDN WILSON, DANNY RAY 5 WSN WILSON, THOMAS W. 28 WUL WITT, ULRICH 24 WNG WONG, LEO 6 YRK YORK, DAVID O. 523 YON YOUNG, ROBERT 3 ZFE ZAGYI, FERENC 8 ZAG ZAJACZ, GYORGY 68 ZLT ZALEZSAK, TAMAS 19 ZAM ZANOTTA, MAURO 1 ZUT ZANUT, STEFANO 12 CONTRIBUTING ASTRONOMICAL ORGANIZATIONS Agrupacia Astronomica Albireo of Seville (Spain) Asociacion Argentina Amigos de la Astronomia Association Francaise des Observateurs d'Etoiles Variables (France) Astronomical Society of Southern Africa, Variable Star Section Astronomischer Jugendclub (Austria) Astronomisk Selskab (Scandinavia) British Astronomical Association, Variable Star Section (England) British Astronomical Association of New South Wales (Australia) Bundesdeutsche Arbeitsgemeinschaft fur Veranderliche Sterne e.V.(BAV) (Germany) Grupo Astronomico Silos (Zaragoza, Spain) Grupo Canario de Estrellas Variables (Canary Islands, Spain) Israeli Astronomical Association, Variable Star Section Madrid Astronomical Association M1 (Spain) Liga Ibero-Americana de Astronomia (South America) Magyar Csillagaszati Egyesulet, Valtozocsillag Szakcsoport (Hungary) Nederlandse Vereniging Voor Weer-en Sterrenkunde, Werkgroep Veranderlijke Sterren (Netherlands) Norsk Astronomisk Selskap, Variable Stjernegruppen (Norway) Planetario e Observatorio Astronomico do Colegio Estadual do Parana (Brazil) Red de Observatores de Estrellas Variables - MIRA (Spain) Royal Astronomical Society of Canada Royal Astronomical Society of New Zealand, Variable Star Section Sociedad Astronomica 'Syrma' (Valladolid, Spain) Svensk Amator Astronomisk Forening, variabelsektionen (Sweden) Uniao Brasileira deAstronomia, Variable Star Commission (Brazil) Unione Astrofili Italiani (UAI) Variable Star Observers League in Japan Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium) ix ------------------------------------------------------------------------------ PAGE x INFORMATION ON R CORONAE BOREALIS Right Ascension Declination Position: (1900) 15h 44m 27s +28 degrees 27.8' (1950) 15 46 31 +28 18.5 (2000) 15 48 34 +28 09.4 Type: R Coronae Borealis R Coronae Borealis stars are one of the rarest types of variable stars. High-luminosity stars of spectral class B - R, they have carbon- and helium-rich and hydrogen-poor spectra, with emission lines of metals seen at minimum brightness. Optically, they are at maximum brightness the majority of the time, and at irregular intervals they show non-periodic fadings of 1 to 9 magnitudes, lasting from several tens to several hundreds of days. Small-amplitude pulsations of several tenths of a magnitude in amplitude, with periods ranging from 20 to 100 days, are superimposed on the light curves of some stars of this type. Spectrum: C0,0(F8PEP) In the spectrum: F8 - spectrum at maximum E - emission lines P - peculiar C0,0 - carbon star spectrum: the first number represents temperature sub-class, and the second refers to overall strength of carbon bands KEY TO SYMBOLS Symbols used in this monograph are: . = 1 visual observation v = variable is fainter than the magnitude indicated by the vertex of the "v" on the light curve (variable not seen) Please note that there may appear to be horizontal lines in some parts of the light curves. These "lines" are in fact very dense concentrations of individual observations. x ------------------------------------------------------------------------------ PAGE xi R CORONAE BOREALIS LIGHT CURVES 1991 - 1995 ---------END OF FILE---------------------------------------------------------