PAGE i American Association of Variable Star Observers AAVSO R SCUTI LIGHT CURVES 1963 - 1985 * * * AAVSO MONOGRAPH 3 This monograph is dedicated to Theodore H. N. Wales in recognition of his contributions and service to the Association. Prepared by Janet A. Mattei Michael Saladyga Elizabeth O. Waagen Charles M. Jones Funds for preparation and publication provided by Theodore H. N. Wales Clinton B. Ford Additional funds provided by International Astronomical Union (IAU) AAVSO members PAGE ii COPYRIGHT 1988 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 Foreword v Observers of R Scuti vii Information on R Scuti xii Key to Symbols xii Light Curves of R Scuti, 1963 - 1985 1 PAGE iv R SCUTI LIGHT CURVES, 1963 - 1985 Introduction AAVSO long-term light curves contain crucial information that bears on many outstanding questions in astrophysics. These light curves define the behavior pattern of variable stars and provide basic sets of observations that may be used to correlate spectroscopic, photometric, and polarimetric multiwavelength data, and to match theoretical stellar models. The AAVSO 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. R Scuti Light Curves, 1963 - 1985 AAVSO Monograph 3 contains light curves of the RV Tauri variable star R Scuti from 1963 to 1985. Pages 1 through 17 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 0) is indicated along the upper axis. A scaled grid is provided with the Monograph to assist in determining the exact date and magnitude of any data point. Factual information on R Scuti and a Key to Symbols are given on page xii. The observations in this monograph are the contributions of AAVSO members or observers in the United States and abroad. 835 observers have contributed over 30,800 observations to these light curves. The names and observer codes of these observers are given on pages vii through xi. In preparing the data for publication, each observation was checked for accuracy, first using a specifically-generated computer program, then by my technical assistants Michael Saladyga and Elizabeth O. Waagen, and finally by me. The individual observations from 1963 to 1985 included in this monograph have been preserved on magnetic tape and printout. Copies of magnetic tape or a listing of observations for further in-depth study may be obtained by writing to the AAVSO Director. Acknowledgements We dedicate this monograph to Theodore H. N. Wales. Ted has contributed generously to the preparation of this monograph, and we extend very sincere thanks to him. Our special thanks go to Clinton B. Ford for his very generous contribution for the preparation of this and subsequent monographs. v PAGE v Our sincere thanks go to AAVSO members and friends for their contributions to prepare these monographs. 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. We gratefully acknowledge the support provided through National Science Foundation Grant AST 7910576 for computerization of a portion of the data in this monograph. We acknowledge with thanks the computer support of the Harvard- Smithsonian Center for Astrophysics and the continued support of Professor Owen J. Gingerich and Miss Barbara L. Welther. The checking of the data and the plotting of the light curves were accomplished using the computers at AAVSO Headquarters. We are indebted to the Research Corporation for the Charles H. Townes Fund Grant to the AAVSO to purchase the in-house computers without which we could not prepare the monographs. Many AAVSO assistants helped in the preparation of the data for publication. Special thanks go to Michael Saladyga for his careful checking of the data and for plotting the light curves, to Elizabeth O. Waagen for extracting the observations from our data files containing 4,000,000 observations and for her meticulous checking of the observations, and to Charles M. Jones, AAVSO's Margaret Mayall Assistant, for developing the computer programs to check the data. Peter M. Garnavich, Robert S. Hill, Karen J. Meech, Shelly K. Pope, and Richard J. Strazdas assisted in the development of the programs to manage the large volumes of data. Barbara Silva, Bethune Kelly, and many Harvard University and Massachusetts Institute of Technology student-assistants 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 January 1988 vi PAGE vii OBSERVERS OF R SCUTI 1963 - 1985 ABBOTT, A. PATRICK AAP BLAGG, BILL BGB ABDOU, DANIEL ABD BLANCO, OMAR BLC ACEVEDO C., FRANCISCO ACF BLANE, D. L. BLD ADAMOLI, GIAN L. ADA BLESSINGER, NEAL I. BNI ADAMS, JAMES E.,JR. ADJ BLIZARD, LINDA M. BZD ADAMS, ROBERT M. AD BLUNDELL, BRUCE BLU ADAMS, WILLIAM ADW BOHME, DIETMAR BOH AGUILLON, M., JUAN AMJ BOHN, DENNIS BOD AGUILUZ O., DAVID AGO BOINCK, F. BFK AHEARN, JOHN AQ BOIS, BERNARD BOI AHNERT, PAUL AH BOONE, ABRAM R. BN AKIYOSHI, TARO C. AYT BORTLE, JOHN E., III BJN ALDERING, GREGORY SCOTT ALS BORTLE, JOHN E. BRJ ALONSO, PAULO SERGIO R. ALP BORTLE, JOSEPH E. BJT AMBROSE, K. SCOTT AMB BORZELLI, CARMINE BZC ANDERER, JOSEPH A. AJ BOURGEOIS, BENJAMIN J. BRG ANDERSEN, ODD'IVAR AOD BOWDEN, JAMES L. BJL ANDERSON, CARL A. AK BRAID, RALPH M. BRD ANDERSON, CURTIS E. AC BRANCHETT, DAVE BDT ANDRESS, J. ROBERT AJR BREHME, FRANCISCO BHF ANDREWS, RICHARD AWR BRENNAN, PETER A. BNP ANNAL, ROBERT J. ANN BREVILLE, WALTER BRV ARMES, DOUGLAS ARD BRINCAT, STEPHEN M. BSM ARNOLD, LUC ARN BRITISH ASTRON. ASSOC. BAA ARONOWITZ, CHARLES AWC BROOKS, JAMES E. BRK ASBJORN, BREIVIK BAV BROOKS, PETER BKP ATKIN, TIM AKT BROWN, ANDREW M. BWA ATKINSON, H.C. AHC BROWN, DOUGLAS BRH ATWOOD, PHILIP F. ATW BROWN, TIMOTHY BRT AUBAD, J. AUB BROWNELL, PATRICIO BRP AUCOIN, DONALD E., JR. ADE BRUNO, ALAIN BOA AUDET, B. HOBART ABH BRYDGES, JEFF BJY BAADE, WILSON H. BD BUCARO, STEPHEN BS BABEAU, BBU BUCKSTAFF, RALPH N. BC BAILEY, GEORGE D. BEY BUENO, ANTONIO T. BUO BAILEY, GREGORY E. BLY BUERGER, DAVID T. BGE BALDWIN, JOHN RAND BLJ BUSS, JOHN C. BJU BALDWIN, MARVIN E. BM BUTLER, HERBERT BTL BALONEK, THOMAS BLN BUTLER, THOMAS BUL BANKS, JAMES BJ CABELLO A., EDWARDO CAE BARCZY, TIBOR BZY CABRERA A., VICTOR CAV BARKSDALE, WILLIAM S. BWK CALDER, JOHN B. CDE BARONE, MIGUEL ANGEL E. BMA CAMPNEY, WALTER CWA BARONI, SANDRO BSR CAMPONUOVO, AMBROSIO CPA BARR, KEVIN P. BAK CANDELA, JOSEPH CEA BARTHA, LAJOS BQ CARNEY, HAROLD CAH BARTOS, PAL BSP CARPREAU, PATRICK CPK BASS, ROBERT BBS CAVAGNA, MARCO CIT BAUER, JOHANN BAU CAYLOR, MARK CYM BEAMAN, BARRY B. BBA CELISS, LEOPOLDO CSL BEAMAN, C. J. BCJ CERRUTI, MIGUEL ANGEL CMA BEAVER, JOHN BEJ CHAMORROS, ADDIE ANDREA CAA BECKMAN, KENNETH BKK CHANTILES, DEAN CNT BEDIENT, JAMES R. BJS CHAPLE, GLENN F., JR. CGF BEGELMAN, MITCHELL BGM CHELEN, F. DIEROT CFD BENNER, TERRY BTY CHESMAN, JOAN CHC BERG, ARTHUR BGA CHESMAN, MICHAEL CHM BERRIOT, BIO CHILDRESS, R. KEN CRK BERTWELL, CHARLES D. BET CHILTON, KENNETH E. CKE BIESADA, MARK R. BMD CHOATE, ROBERT CHR BILODEAU, GERALD. A. BIL CHRISTENSEN, GLENN J. CST BIRIOUKOFF, GEORGES BIK CLANCY, SEAN CLL BIRKNER, ALAN J. BKN CLARK, WAYNE CLK BISHOP, EDWIN V. BEV CLEMENT, EDWARD W. CEW BISHOP, SHEILA V. BSV CLYDE, ROBERT CLB COLE, ANN CLO COLEMAN, DONNIE S. COD COLLINS, DWIGHT A. CDA COLLINS, PETER L. COL COLOMBO, TIZIANO CLT CONNOR, WILLIAM J. CWL CONNORS, MARTIN G. CNS CONSTANZO, DANIEL CSD COOK, LEWIS M. COO COOK, RYAN D. COK COOK, STEPHEN P. CK CORREA DE M., MARCIO R. CRM CORTNER, DAVID CRN COULOMBE, ANDRE COA COX, LOUIS B. CLX CRAGG, THOMAS A. CR CRUMRINE, ROBERT CRR CUNNINGHAM, DOUG CUN CURRIE, JAMES O. CRY CUSATIS, CESAR CU DA SILVA, JOSE LUIZ DS DA SILVA, LUIZ A.(ALSO SLI)DSL DALOS, ENDRE DAE DANSKIN, KEITH H. DAK DAVIDSON, GREG DV DAVIDSON, ROBERT DRB DAVIS, JACK DAJ DAVIS, RICHARD H. DRH DAW, MURRAY DAW DAWSON, DENNIS W. DWN DAZLICH, DONALD DAZ DE CARVALHO, CELSO DCC DE KOCK, REGINALD P. DK DE LA VEGA L., RODRIGO DVR DE LA VEGA L., XIMENA DVX DE YOUNG, JAMES A. DEY DEANE, BILL DEB DEBOOSERE, FRANK DBF DEICSICS, LASZLO DCS DELAURENTIS, ARTHUR S. DEL DENNIS, MICHAEL DML DICKINSON, WILLIAM DIK DICKSON, RICHARD MARK DCK DIEDRICH, DELORNE DHD DIEDRICH, GEORGE DHG DIERICK, DOMINIQUE DMN DILLON, WILLIAM G. DIL DIXON, JAMES DIX DIXON, ROBERT DRX DOLZAN, ALES DZA DOMEN, RONALD DMR DOMENY, GABOR (ALSO DOM) GDB DOUCET, ROBERT DR DOUGLAS, ROBERT DGL DRUKER, ROSS DRU DUCOTT, G. RUSSELL DC DUMONT, MICHEL DMO DUNDEE, DAVID A. DUD DURKEFALDEN, MANFRED DKF DYCK, GERALD P. DGP D'ERRICO, PAUL DPC EAST, GEORGE EG ECHEVERRIA, A. RODRIGUEZ ECH ECKERT, CHRISTOPH ECK EDWARDS, DANIEL J. EDW vii EHRHART, EDWARD EHR GREENE, BARRY GBA ELIAS, DEMETRIUS P. ELD GRIESE, JOHN W., III GRI ELLERBE, JAMES E.(ALSO EJE)EL GRISSOM, JEFF GRS ERIKSSON, SOREN EKS GROSSMAN, ARNOLD S. GA ESSEX, CHRIS ESS GRUNANGER, MUCHAEL GML EVERAERT, JEAN LUC EJL GRUNTMEYER, PAUL GNT FARRAR, WALTER B., JR. FRW GRZELCZYK, HEINZ GRZ FARREN M., J. DARIO FMD GUGUMUS, V. GUG FELSON, ROBERT FLS GUINNEBERT, M. GNN FENYVESI, ANDRAS FEN GUZENSKI, LEONARD C. GUZ FERNALD, CYRUS F. FE GUZMAN B., SERGIO GZ FERNANDEZ, YAMANDU A. FER HADHAZI, SANDOR HDH FIADONE, ROBERTO G. FRD HAGER, TIMOTHY HTY FIDRICH, ROBERT FRF HALBACH, EDWARD A. HK FINKE, BARBARA FIN HALL, MARK A. HMK FITZGERALD, D. J. FG HALLER, WILLIS HLR FLEISCHER, GERALD FLG HAM, RONALD HMR FLORKOWSKI, DAVID FS HAMPTON, WALTER R. HP FLYNN, EDWARD M. FEM HANSON, GENE HSG FODOR, ANTAL FDA HARRINGTON, PHILIP HRR FORCZYK, STEPHEN FZS HARTIGAN, PATRICK M. HAT FORD, CLINTON B. FD HARTMAN, WILFRIED HRW FORMA, JAMES FOJ HARTMANN, FERDINAND H FORRESTER, FRED W., JR. FFW HARTMANN, PAUL HAP FORTE, JOAN C. FJC HARVAN, RICHARD P. HAV FRASER, CRAIG FZR HATAI, ERNIE HAE FREEMAN, ROBERT A. FRO HEASLEY, ALLEN S. HY FRIEDMAN, DAVID M. FN HEASLEY, MRS. BETTE L. HYB FRIGON, LEON A. FRI HEASLEY, THOMAS A. HYT FRITON, EDWIN E. FR HEGEDUS, TIBOR HGT FROSINA, ANGELO FAA HEISER, ERWIN HEE FUCCI, FABIAN FFA HEITMANN, FRANK G. HTM FUHA'SZ, LASZLO FLZ HENDERSON, RONALD HZ GAL, PETER GAL HENSHAW, COLIN HEN GALDUN, DAN GAD HEVESI, ZOLTAN HEV GALE, EUGENE C. GEC HEYNDRICKX, BRUNO HEY GARASICH, JAMES W. GJW HIETT, F. LANCASTER HE GARDNER, BRUCE E. GBE HILL, RICKY L. HIL GARDNER, ROBERT J. GDR HIRASWAW, YASUO HIR GASKILL, MIKE GMK HOFFMAN, JIM HOF GASPARIAN, GEORGE GAG HOGAN, MICHAEL E. HGM GAYDOS, MARK GAY HOLTON, CHANDLER HLC GAYLORD, THOMAS GYL HONDA, HIDEO HOH GEORGE, ANTHONY J., JR. GJA HONNART, FREDERIC HON GERBER, CHRISTOPH GCP HOPP, ULRICH HOP GHIO, LUIS H. GHO HORNBY, PETER W. HRB GIANNOTTA, GIORGIO GGI HOROWITZ, DANIEL HDT GILCHRIST, ROBERT S. GCH HORVATH, FERENC HFE GIULIANI, VALTER GVT HORVATH, GEZA HOV GLENN, MRS. FLORENCE GLF HORVATH, ISTVAN HOI GLENN, WILLIAM H. GLW HOSTE, SERGE HSR GLIBA, GEORGE W. GLG HOUGH, DAVID HOU GOEHRING, JIM GJ HOUSTON, WALTER SCOTT HU GOMEZ, LUIS GZL HOWELL, ANDY HOA GONZALES, JOSE LUIS GGJ HOYNOS, JOHN F. HYJ GOODWIN, PAUL N. GOP HUBBARD, RUSSELL S. HUB GORKIN, ROBERT GOR HUDAK, DANIEL M. HDA GOTTIG, CONRAD GTG HUDGENS, BEN HDB GOUGH, THOMAS GGH HUDSON, JEROME A.(ALSO H59)HJA GRAHAM, KENNETH GRK HUGHES, DONNA J. HUO GRANSLO, BJORN H. GRL HUGHES, JOEL R. HUJ GRANT, JEFFERSON H. GJH HULLETT, WILLIAM J. HWT GRASSHOFF, E. RAY GAS HUNTER, TIM HUT GREEN, DANIEL W. E. GRW HURLESS, CAROLYN HR GREEN, JEROME GRN HUTTON, KATHERINE HTN IDEM, MICHAEL IML INGATE, SHANE F. ING ISLES, JOHN E. ILS ITO, MASAYUKI ITO IZUMO, AKIKO IAZ JAMES, DONALD R. JMD JANUS, CHARLES JUS JOHN, STUART W. JSW JOHNS, MIKE JHN JOHNSON, ARTHUR, JR. JOA JOHNSON, BRAD JNB JOHNSON, GUS E. JOG JOHNSON, LEROY JOL JOHNSTON, BEN JBN JOHNSTON, ROBERT B. JT JONES, MICHAEL I. JNM JONES, RODNEY V. JRV JORDAHL, DAVID JRD JORDAN, JERRY JJN JUHASZ, IBOR JUH JURY, ROGER JRR KANE, KEVIN KAN KARASZI, ISTVAN KAI KARBERG, WAYNE KAR KARLI, DOLENC KDC KELLY, FRANK J. KY KENDALL, L. J. KND KERDO, P. KDP KERLEY, LLOYD, JR. KLD KESZTHELYI,SANDOR(ALSO KZS)KSZ KIRBY-SMITH, HENRY T., JR. KBS KLEBERT, KLAUS KLK KLEIN, ALBERTO EDUARDO KAE KNIGHT, GEORGE KGT KNIGHT, JESSE W. KJW KNIGHT, STEPHEN P. KSP KNOWLES, JEREMY H. KS KNOX, OSWALD J. KOJ KNUPP, PAT KPP KOCSIS, ANTAL KOC KOHL, MICHAEL KHL KOKKINEDIS, AKIS KAS KOLE, MARC KML KOLLATH, ZOLTON KLZ KOLLER, HERBERT J. KHJ KOLMAN, ROGER S. KRS KORYKANSKY, DONALD G. KCY KOSA-KISS, ATTILA KOS KOVACS, ISTVAN KVI KRENZ, ROBERT C. KNZ KRINGEL, REV. FR. ROBERTO KRR KRISCH, GUNTHER KIS KRISCIUNAS, KEVIN L. KRK KRUSZKA, JOHN S. KRZ KRUTA, JAROSLAV KRU KUNICK, JEROME KC KUNKEL, SCOTT KSL KUNOVITS, JENO KNV KUPLINSKI, ROBERT, JR. KUR KURTZ, CONRADO F.(ALSO WCF)KCF KUTNJAK, ZORAVKO KZO KUWABARA, TAKEHISA KUW LA FORTUNE, EDWARD LFE LA PERNA, RAFAEL LPR LAM, DAVID LAM viii LAMBERT, RANDY LAR MATSON, MICHAEL MAT LANDIS, HOWARD J. LND MATTEO, ERBA MEB LANGE, HERBERT A. LGH MATZEK, OTHMAR MTZ LANGHANS, THOMAS W. LTW MAVROFRIDIS, GEORGE MGE LARSEN, TROND LTN MAYALL, MARGARET W. MA LASKOWSKI, THOMAS M. LTM MAYER, ERNST H. MYR LATZEL, LARRY J. LAT MAYER, ERNST W., JR. MYW LAUER, TOD R. LUT MAYER, JAY W. MJW LAURENT, DIRK LDR MC CALLUM, ROBERT MCB LAVERY, RICK LVR MC CARTHY, SUANNE MYS LAWRENCE, PATRICIA H. LAW MC DONALD, JAMES MDO LAZUKA, THOMAS LZT MC GINNS, GARY MGG LE MAY, DAMIEN LMA MC GLENN, ROBERT MGN LE VAUX, HOWARD A. LV MC INNERNY, BRIAN J. MCI LEAKE, DAVID C. LKD MC LANAHAN, DAVID MCH LEBERT, ROLAND LEB MC MILLAN, BETTY MBC LECVONA, ADOLFO LCA MEANS, DENNIS L. MSD LEIFSEN, TORBEN LTF MEDWAY, KENNETH J. MED LENSS, IVARS LNS MEGGINSON, D. L. (ALSO M30)MDG LERUIK,ROLF LEK MENALI, HALDUN MHI LESTER, DANIEL LES MENDENHALL, FREDERICK, JR. MFT LETELLIER, GERARD LLR MERO, LASZLO MER LEVESQUE, ADRIAN J., JR. LAJ MEZOSI, CSABA MEZ LEVY, DAVID H. LVY MIKEL, ALAN MKA LEY, FREDERICK LEF MILLER, MARTIN P. MLM LIKERT, GARY LIK MILOTTI, EDOARDO MIO LIN, HUAN LHN MILTON, RUSSELL MTL LINDBLOOM, GEORGE G. LNB MIMNA, ROY A. MMA LOCHER, KURT LK MINNITI, EDGARDO RONALD MNT LOHVINENKO, TODD W. LWT MINOIS, J. MIS LORING, DANIEL P. LRD MINTEL, WILLIAM MNW LORSIGNOL, SERGE LOS MISHLER, JERALD R. MJR LOS, EDWARD J. LEJ MITCHELL, MARGUERITE MIM LOUKAKIS, LOUKIS LOU MITRA, UMASANKAR MUK LOUTH, HOWARD LOT MITSCHKE, FEDOR MIT LOVETT, JAMES LVT MIZSER, ATTILA MZS LOWDER, WAYNE M. LX MOCHIZUKI, ETSUIKU MCE LUBBERS, TOM LTB MOGELINSKI, JERRY MGJ LUBCKE, GILBERT C. LBG MOHRBACHER, DAVID MOD LUCAS, DIANE LS MONGER, DON R. MDE LUDATSCHKA, RICHARD LUD MONIOT, PHILIP MPT LUDWIG, CLUYSE LCS MONSKE, ROBERT L. MOR LUFT, HERBERT A. LJ MONTAGUE, ALLEN C. MJ LUKAS, RAINER Z. LKS MOORE, DR. WALTER L. MO LUNN, MARTIN LUM MOORE, E. G. MOO LUOMA, ROBERT J. LUO MOORE, PATRICK MOP MAAG, RUSSEL C. MAA MOORHOUSE, A. J. MAJ MACRIS, CONSTANTINOS J. MCC MORBIDELLI, ALEXANDER J. MAO MADDEN, PATRICK J. MDD MORGAN, JAMES A. MJA MAGOR, DONALD M. MGR MORGAN, JAMES E. MOJ MAHNKEY, C. PATRICK MAN MORRIS, CHARLES S. MRR MALECK, WOLFGANG MWG MORRISBY, ARTHUR G. F. MB MALEHAM, DAVID MLD MORRISON, PATRICK D. MRO MANN, REV. GARY L. MGL MORRISON, WARREN C. MOW MARCARIO, MIKE MCO MOSURE, SYLVIA MOS MARCHENA, PEDRO A. MHA MUCSI, DEZSO MDZ MARIONI, JUAN C. MJU MUIRDEN, JAMES MRD MARK, GIDEON MAG MULAC, RICHARD MUC MARLOWE, RAYMOND MLR MULLIGAN, THOMAS MUL MARRACO, HUGO G. MHG MURN, PAUL MUR MARTA, SANDER MTA MURPHY, A. THOMAS MU MARTER, WAYNE MAW MURPHY, MICHAEL J. MJC MARTIN, CHRISTOPHER J. MAE MURPHY, MIKE MUM MARTINEZ V., CARMEN MVC MURPHY, SHERYL MSU MASCOLA, KEN MSK MURRAY, DONALD T. MDT MUZINUCH, RICHARD P. MRZ NAGY, ALEXANDER NGY NAGY, ZOLTAN NZO NASLUND, MAGNUS NAM NEMETH-BUHIN, AKOS BAO NEUBAUER, RICHARD NRB NEWBERRY, MARK NM NEWMAN, PAUL J. NPJ NGUYEN, JEAN-JACQUES NGU NIGHTINGALE, HOWARD C. NT NORDBY, JOHN M. NBY NORDEN, RODNEY A. NN NORTON, EDWARD NTE NORTON, THOMAS S. NTS NOURSE, JIM C. NS NOWAK, GARY NOG OLIVAREZ, JOSE OJ ORAVEC, EDWARD G. OV ORR, ROBERT ORO ORTEGA, GIL JUAN CARLOS OGJ OSORIO, JOSE RIPERO OJR OSTERMANN, ALEXANDER OSA OTTUM, BRIAN D. OTB OVERBEEK, M. DANIEL OB O'BRIEN, GERALD J., M.D. OBG O'CONNOR, STEPHEN D. OCN O'MEARA, STEPHAN OME PAPATHANASSIOU, MARIA PPM PASTORE, PETER F. PSP PATRICK, RAYMOND PRN PEARCE, ERIC C. PCE PEARLMUTTER, ARTHUR E. PN PEARLMUTTER, JOAN W. PJW PEATTIE, NOEL PTI PEGUET, CLAUDE PEG PELTIER, LESLIE C. P PENN, MATTHEW PNM PERALA, MARTTI PMR PEREIRA, ALFREDO PAE PEREZ, ALAIN PZA PERLMAN, KENNETH A. PLM PESCI, FRANK PFK PESCI, STEFANO PSO PETERSEN, ERICH U. PTN PETIK, JANOS PEK PETROHAN, BETTY PNB PETTENGILL, DWYNAL B. PED PFEIFFER, GERHARD PFF PICKUP, D. A. PIC PIKE, ROBERT PIK PIPINIAS, JOHN PPJ PIRITI, JANOS PIJ PIVONKA, ROBERT J. PRJ POCS, MIHALY PCS POOLE, RANDALL M. PLR PORTA, MICHELLE PTM POWELL, EUGENE A. PO POXON, MICHAEL POX PRICE, FRANCIS J. PFJ PROUST, DOMINIQUE PDQ PROVIN, ROBERT PR PTACEK, KIM E. PTF PUGET, ALFRED PGA QUADT, PETER H. QD QUINN, PETER F. QPF ix QUINNERT, CHRIS D. QN SCOVIL, CHARLES E. SCE RAMSEY, MICHAEL L. RMM SEBASTIANO, PAUL SBP RANDALL, EVERETT Z. REZ SEGERS, CARLOS A. SS RAPHAEL, ROBERT B. RRB SEIFERT, EDWARD H. SEE RAUSCHKA, HELMUT RHT SERCOMBE, GAYLE SEG RAVET, GEORGE RAV SHARP, JOHN SRP RAYMON, KEN RYK SHARPE, STEPHEN B. SHS RAYNOR, LYNN O. RNR SHERMAN, BARRY SNB REESE, CHRISTOPHER REC SHERROD, CLAY SHB REHNER, DAN REH SICOLI, PIERO SPS REINHARD, PETER REP SIMMONS, DANNY R. SID REINHART, CHARLES C. RNT SIMMONS, KARL SKL RENAULT, JEAN REN SIMMONS, WANDA SKW RENNER, CARL J. RCJ SIMPKINS, ERIC SKR RHODES, RICHARD RDR SINGER-BREWSTER, STEPHEN SBS RICKER, CHARLES L. RQ SINOR, TIMOTHY WAYNE SOT RIGGS, JOHN I. RJI SKINNER, C. R. SKN RIPLEY, GEORGE RGG SKIPKA, JOSEPH SKJ RIPPEN, GEORGE RG SKJAERAASEN, OLAF SOF ROBERTS, HARRY V. RH SKOTTEGARD, PETER N. SKT ROBERTS, MARY D. RMD SLACK, LEONARD L. SLL ROBINSON O., ATHOS ROA SMITH, ALAN L. SMI ROBOTHAM, ROBERT A. RAR SMITH, C. J. SMH ROCHE, HYMAN RHY SMITH, FRANKLIN W. S RODRIGUES A., PAULO S. ROP SMITH, HORACE A. SHA ROMOLI, CLAUDIO RMI SMITH, JAMES C. SJE RONEY, J. MICHAEL ROJ SMITH, MICHAEL B. STL ROSEBRUGH, DAVID W. RB SOMODI, MIKLOS SOK ROSENFIELD, CHRISTINE RNC SOUTHWICK, ROBERT G. SOU ROSENFIELD, DONALD A. RND SPECHT, HENRY E. M. SH ROSS, GARY M. ROG SPECHT, MILES SPM ROSS, HUGH ROH SPEIL, JERZY SJZ ROSS, STEWART ROS SPRATLEY, WILLIAM SPW ROWSTRON, G. W. RW SPRATT, CHRISTOPHER SC ROYER, RONALD RR SPRYN, N. GREG SPG RUMBALL-PETRE, HUGH RPH STEARNS, ALLEN STA RUMMLER, FRANK RML STECKNER, THOMAS K. SKS RUPNIK, MILAN RMK STEFFEY, PHILIP C. STI RUTTER, ALLAN RAN STEGMANN, PAUL SGP RYAN, PHILIP J. RPJ STEINBACH, HANS M. SHY SABINE, KENNETH M. SAB STEPHAN, CHRIS SET SACCONE, DONALD SCD STEPHANOPOULOS, GEORGE STF SADOW, JONATHAN C. SJC STEPHENSON, BETTY SBY SAGODI, TBOLYA SGT STEWART, ROBERT J. SWT SAKARIAS, MICHAEL SKM STIEGLER, MICHAEL SGL SAKUMA, SEI-ICHI SSU STITH, ED SED SALADZIUS, ROGER SZR STOIKIDIS, NIK STQ SAMPSON, RUSS SSR STONE, P. MICHAEL STO SANDEL, JEFF G. SNL STRATER, JACK L. SJL SAVILLE, THOMAS C. SVT STRAZDAS, RICHARD SYR SCHAEFER, BRADLEY E. SCK STRITOF, NIKOLAJ SNJ SCHAUER, EWALD SHU SU, MICHAEL C. P. SU SCHAUPP, RICHARD W. SRW SULLIVAN, THOMAS FR. ST SCHIAVONE, GUSTAVO J. SCV SURAWSKI, URSULA E. J. SUR SCHIMPF, STEPHEN M. SSC SVENTEK, PAUL SVN SCHMIDT, FRANK SMF SWEETSIR, RICHARD A. SWR SCHMIDT, JOACHIM SIJ SZABO, BALINT SZU SCHMIDT, JOZSEF SHJ SZABO, EDIT SZQ SCHMIDT, ROBERT H. SRD SZABO, MISS ANDREA SZB SCHMITZ, VICKI SV SZANTHO, LAJOS SOZ SCHOLL, JAMES F. SMJ SZARAZI,MISS MAGDA SZZ SCHOTT, CHESTER F. SCF SZASZ, MARIO SMZ SCHROYENS, ANN SCY SZEKELY, CSABA SZ SCHROYENS, DANIEL SDH SZENTMARTONI, BELA SZC SCHWEITZER, EMILE SCZ SZIGETI, MIKLOS SZI SZILVAY, PETER SZV SZOKE, BALAZS SKB TABOADA R., DOMINGO TB TAKATS, PETER TAK TALAGA, ROBERT TLR TAMAS, POLTL JANOS FPJ TANZER, RICHARD TZR TAVARES, JOAO RODRIGUES TJR TAYLOR, MARY JANE TYR TAYLOR, PETER O. TAY TEMPLICZKY, ISTVAN TPS THIBAULT, GUY THG THOMAS, HOWARD D. TM THOMAS, JAMES TJ THOMAS, JOSEPH V. THM THOMAS, RON P. TMR THOMPSON, JAMES B. TJ THOMPSON, MICHAEL E. TME THOMPSON, R. STEPHEN THS THOMPSON, R. R. (ALSO TPR) THR THOUET, BERNARD THU TIANEN, NEIL TIN TIC, BOJAN TBC TOLGYESI, ANTAL TAN TOONE, JOHN TOO TORMA, TIBOR TOT TOWNSEND, A. WAYNE TWN TRAYNOR, F. N. TFN TROIANI, DANIEL M. TDM TROMMER, DIRK TRR TRONDAL, ODD TRO TRUAX, JON C. TJC TSAI, CHANG-HSIEN TC TUBOLY, VINCE TUB TURCO, EDWARD TUE TURNER, DOUGLAS K. TDK TYSON, RICHARD L. TYS ULLMANN, ALBERT UL VADASZ, SANDOR VAD VAIDIS, JEAN PIERRE VAI VAN BUREN, DAVID VBN VAN ORSOW, DOUG ODV VAN WASSENHOVE, JEROEN VWS VANIER, PIERRE VNL VANMUNSTER, TONNY VMT VARNEY, DOUGLAS M. VNY VARNUM, ALBERT G., JR. VAG VATTUONE, MARIO VAM VEDRENNE, PAUL VED VERDENET, MICHEL VET VERVLOET, WETHER J. VWJ VIALLE, JACQUES VIA VISOCKI, GARY VIS VODRA, RICHARD VDR VOLLMAN, WOLFGANG VOL VUYLSTEKE, PIETER VYP WAFFEN, GUSTAV J. WGJ WALDEN, PATRICK L. WLD WALKER, PAUL WKP WALKER, THOMAS D. WKR WALKER, WILLIAM WSW WALLS, HOY J. WLL WALSH, JEROME WAL WALTER, A. RICHARD WAR WASHBURN, WILLIAM A. WWA x WASSON, NORMAN F. WNF WIENS, DOUGLAS WNS WATANABE, AKIRA WAT WILCOX, JOHN T. WJT WEBER, DONALD F. WBD WILLIAMS, DAVID B. WI WEBER, JAMES W. WEB WILLIAMS, DEBRA J. WDJ WEBER, RICHARD J. WER WILLIAMS, DEWEY R. WMS WEINER, WILLIAM WIW WILLIAMS, J. D. WIJ WEITZENHOFFER, KENNETH WZ WILLIAMS, ROBERT H. WMR WELCH, DOUGLAS L. WEL WILLIAMS, THOMAS R. WLM WELLS, ANDREW WEA WILS, PATRICK WLP WELLS, KARL A. WS WILSON, JAMES A. WJA WERNER, JAMES WRJ WILSON, KENNETH WLN WERNER, WILLIAM WRW WILSON, THOMAS W. WSN WESOLOWSKI, MIKE WEM WILSON, W. J. WWJ WEST, FREDERICK WEF WILSON, WILLIAM M. WWM WEST, JOHN WTJ WINGATE, BRUCE WNB WEST, RANDY F. WES WINKLER, WILLIAM R. WWR WHITT, ELIZABETH S. WTE WISE, J. D. WIE WHITTEN, MICHAEL WMN WITTEN, BLAKE C. WTN WOBUS, RICHARD L. WBS WOHLEVER, RICHARD A. WHR WOHLEVER, TOM WHT WOMACK, CAROLYN L. WCL WOOTEN, J. WAYNE WJW WRIGHT, IRVING B. WRI YEAGER, ROBERT D. YEA YOUNG, ALBERT L. YNG ZAFFI, JOHN ZAF ZAJACZ, GYORGY (ALSO ZGZ) ZAG ZAK, DEAN S. ZAD ZALEZSAK, TAMAS ZLT ZANDER, ERNIE ZN ZANOTTA, MAURO ZAM ZENKL, GABOR ZLG ZIMMERMAN, DENNIS ZMM ZIT, RAYMOND ZT ZUKAUSKAS, WALTER ZW CONTRIBUTING ASTRONOMICAL ORGANIZATIONS Association Francaise des Observateurs d'Etoiles Variables (France) Astronomical Society of Southern Africa, Variable Star Section Astronomischer Jugendclub (Austria) Berliner Arbeitsgemeinschaft fur Veranderliche Sterne (West Germany) British Astronomical Association, Variable Star Section (England)---(BAA) Japan Astronomical Study Association Nederlandse Vereninging Voor Weeren Sterrenkunde, Werkgroep Veranderlijke Sterren (Netherlands)---(NDR) Norsk Astronomisk Selskap, Variable Stjernegruppen (Norway) Pleione Valtozocsillag-eszlelo Halozat (Hungary) Royal Astronomical Society of Canada Scandinavian Astronomisk Selskap---(SAS) Veringing Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium) xi PAGE xii INFORMATION ON R SCUTI Right Ascension Declination Position: (1900) 18h 42m 08s -05o 48.8' (1950) 18 44 49 -05 45.6 (2000) 18 47 30 -05 42.4 Type: RV Tauri star of subtype a RV Tauri stars are one of the rarest kinds of high-luminosity pulsating variables. They are yellow supergiants intermediate to Cepheids and Mira variables in period and spectrum. Their light curves typically show shallow and deep minima, with intervals between successive minima ranging from 30 to 150 days. Their spectra range from F to G at maximum and K to M at minimum. The subtype RVa maintain an approximately constant mean magnitude, and have strong emission lines and sometimes show TiO bands near minimum. (For a comprehensive review of RV Tauri stars, and R Scuti, see the article "Recent Work on RV Tauri Stars" by Robert F. Wing in the Journal of the AAVSO, Volume 15, 212; 1986.) Average Period: Varies from 137.4 to 152.5 days Spectrum: G0IAE at maximum K2P(M3)IBE at minimum In the spectrum: A indicates H-alpha B indicates H-beta E indicates Emission P indicates Peculiar (M3) indicates the spectral type according to the presence of TiO bands KEY TO SYMBOLS Symbols used in this monograph are: . = 1 observation xii PAGE xiii R SCUTI LIGHT CURVES 1963 - 1985