PAGE i R S C U T I L I G H T C U R V E S 1 9 8 5 - 1 9 9 0 AAVSO MONOGRAPH 3 SUPPLEMENT 1 This monograph is dedicated to Thomas R. Williams in recognition of his service and many contributions to the Association. Prepared by Janet A. Mattei Elizabeth O. Waagen E. Grant Foster Funds for preparation and publication provided by Thomas R. Williams Clinton B. Ford Additional funds provided by AAVSO Members International Astronomical Union (IAU) PAGE ii ISBN 1-878174-07-X COPYRIGHT 1991 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 Scuti vii Information on R Scuti x Key to Symbols x Light Curves of R Scuti, 1985 - 1990 1 PAGE iv is blank PAGE v R SCUTI LIGHT CURVES, 1985 - 1990 Introduction AAVSO long-term light curves contain crucial information that has a significant bearing 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 check theories and match 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. Each Supplement to a Monograph continues the light curves of the same star, bringing them more up-to-date. R Scuti Light Curves, 1985 - 1990 AAVSO Monograph 3, Supplement 1, contains light curves of the RV Tauri variable star R Scuti from 1985 through 1990. Pages 1 through 5 contain computer-generated light curves with each dot representing one observation. Observations are plotted Julian date versus magnitude, and the start of each year (January0) 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 Scuti and a Key to Symbols are given on page x. Observations from JD 2446000 to 2446090 were also published in Monograph 3. They are repeated in this supplement to make the first light curve more complete. The observations in this supplement are the contributions of AAVSO members or observers in the United States and abroad. 485 observers have contributed 14,344 observations to these light curves. The names and observer codes of these observers are given on pages vii through ix. In preparing the data for publication, each observation was evaluated for accuracy by my 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 1985 through 1990 included in this monograph have been preserved on magnetic tape, cartridge, and printout. Electronic, diskette, magnetic tape, or printout copies of observations for further analysis may be obtained by writing to the AAVSO Director. Acknowledgements We dedicate this monograph to Thomas R. Williams. Tom has contributed generously towards the preparation of this monograph supplement, and we extend our 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 and monograph supplements. Our sincere thanks go to AAVSO members and friends for their contributions to prepare these monographs and monograph supplements. 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 acknowledge with thanks the computer support of the Smithsonian v PAGE vi Astrophysical Observatory for the processing of part of the data and data preservation. 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, Douglas Van Orsow, Young Lim, Michael Bickford, and several otherstudent-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 tothemfor their valuable astronomical contributions. Janet Akyuz Mattei Director Cambridge, Massachusetts October 1991 vi PAGE vii CONTRIBUTORS TO AAVSO DATA ON R SCUTI 1985 - 1990 AAP A. Abbott 64 COL P. Collins 189 GRL B. Granslo 173 AD R. Adams 3 CMG G. Comello 24 GEZ Z. Gregor 1 AFA A. Alfoldi 1 COO L. Cook 2 GIA A. Grima 23 ADT D. Alteweier 86 CK S. Cook 12 GSC C. Gros 13 AAA A. Alves 28 COM T. Cooper 75 GML M. Grunanger 59 AJ J. Anderer 6 COA A. Coulombe 3 GRZ H. Grzelczyk 124 AOD O. Andersen 1 CLX L. Cox 1 GUB G. Gubbels 82 ACA P. Aneca 2 CR T. Cragg 17 GJU J. Guerrero-Ordas 1 ARZ M. Arozena 1 CG G. Crawford 1 GMM M. Gumler 2 ARQ B. Arquier 1 CRR R. Crumrine 1 GWZ R. Guziewicz 6 AKT T. Atkin 3 CZE E. Csiszar 5 GYA L. Gyarmati 1 AUB J. Aubaud 7 CZT T. Csiszar 4 GYP P. Gyenizse 1 ADE D. Aucoin 9 CSI I. Csoti 14 GYO J. Gyori 1 BZA A. Balazs 2 CSM M. Csukas 16 HTY T. Hager 39 BMQ M.Baranda-Gomez 18 DAH H. Dahle 1 HK E. Halbach 20 BBC R. Barbosa 6 DSL L. Dasilva 4 HMG G. Halmi 66 BSF S. Barnhart 2 DYJ J. Dauby 4 HMR R. Ham 229 BSR S. Baroni 87 DV G. Davidson 10 HAN J. Hannon 11 ABA A. Bartolini 4 DMA M. Davis 1 HNJ J. Hansen 1 BTS L. Bata 1 DCA D.deCarhalvo 24 HSG G. Hanson 1 BBA B. Beaman 10 DRE A.de la Rosa 48 HLA L. Harris 3 BVD D. Beard 2 DBF F. Deboosere 6 HAV R. Harvan 53 BKK K. Beckmann 1 DBR B.Decottignies 3 HNO N. Hasegawa 1 BJS J. Bedient 4 DFF C. Deffayet 2 HDO M. Havassy 3 BTY T. Benner 46 DPB B. Depontieu 1 HY A. Heasley 3 BNS S. Bergeron 7 DNO O. Deren 88 HLS L. Heen 71 BIO P. Berriot 33 DWJ J. Deweerdt 1 HEN C. Henshaw 50 BSA M. Besana 3 DIZ J. Diaz 2 HGZ Z. Herceg 15 BEZ J. Bezecourt 3 DPA A. Diepvens 1 HEV Z. Hevesi 20 BIC L. Bichon 112 DIN R. Dinardo 1 HE L. Hiett 226 BKN A. Birkner 21 MDS M. Dionisi 4 HNA N. Higginbotham 2 BGB B. Blagg 3 DRX R. Dixon 1 HIM M. Hill 4 BAX A. Boattini 9 GDB G. Domeny 21 HRI R. Hill 4 BFK F. Boinck 7 DZS S. Dominguez 53 HIR Y. Hirasawa 21 BYR J. Bondono 2 DUP P.DuPasquier 11 HSK K. Hirosawa 7 BRJ John Bortle 107 DUS R. Dubois 4 HFO G. Hoffer 5 BJT Joseph Bortle 11 DMO M. Dumont 162 HLT G. Holter 17 BMU R. Bouma 20 DDV D. Durham 1 HZJ J. Holtz 4 BRG B. Bourgeois 5 DGP G. Dyck 225 HRB P. Hornby 8 BDS R. Boyd 17 EL J. Ellerbe 39 HDT D. Horowitz 392 BYS S. Bradley 2 EPE P.Enskonatus 14 HFE F. Horvath 4 BDT D. Branchett 6 EJL J. Everaert 1 HSR S. Hoste 1 BAQ A. Bras 18 EWK K. Ewing 7 HJA J. Hudson 8 BDL D. Breslin 5 FEO E. Farkas 6 HTR T. Hunefield 2 BSM S. Brincat 176 FKJ J. Fekete 11 IPA P. Ingrassia 5 BKF F. Brockmeier 10 FRD R. Fiadone 6 IFJ F. Ives 11 BOS E. Broens 69 FRF R. Fidrich 157 JLR R. Jepea l8 BBT R. Browning 29 FDA A. Fodor 8 JOG G. Johnson 29 BYV Y. Brucher 1 FDC F. Fodor 2 JON K. Jonckheere 1 BOA A. Bruno 6 FFC F. Foldesi 41 KB W. Kaminski 14 BJY J. Brydges 3 FYE E. Frey 1 KTA T. Kato 53 BUI H. Burillier 37 FRH A. Frich 58 KTS X. Katsadramis 2 BJU J. Buss 5 FAA A. Frosina 14 KSI S. Kiyota 2 BTK A. Buttrick 2 GLR A. Gaal 1 KLC C. Klausing 7 CBA A.Cabrera-Rodriguez 49 GWB W. Gable 3 KMT T. Kmetovits 1 CPX P. Calvo 1 GBZ O. Gabzo 137 KGT G. Knight 62 CMN R. Cameron 30 GCA A. Garcia 21 KJW J. Knight 2 CPA A. Camponovo 3 GMK M. Gaskill 1 KSP S. Knight 3 CFN F. Campos 28 GKR R. Geckeler 15 KS C. Knowles 7 CJA J. Campos 1 GCP C. Gerber 24 KOC A. Kocsis 220 CIA L. Camurri 13 GMJ M. Geyser 4 KDF D. Kocyla 11 CEA B. Candela 3 GIR W. Gilchrist 9 KHL M. Kohl 99 CNU N. Cardoso 8 GLF F. Glenn 4 KAS A. Kokkinedis 36 CW W. Carini 6 GLW W. Glenn 4 KHJ H. Koller 3 CGJ J. Carragan 2 GLC C. Glowinsk 3 KOS A. Kosa-Kiss 113 CGW W. Carragan 2 GHA H. Goldhahn 15 KOA M. Koshiro 1 CRV R. Castineiras 1 GPX W. Goltz 10 KVI I. Kovacs 45 CGF G. Chaple 10 GOT T. Gomez 17 KVK K. Kovacs 3 CYA A. Cichy 39 GZN A. Gonzales 20 KIS G. Krisch 277 TCE E.Cifuentes-Torres 77 GNI N. Gonzalez 1 KUC S. Kuchto 58 CWP W. Clarke 31 GLM L. Gorski 43 KSA A. Kucinskas 64 CLG L. Cluyse 14 GFF T.Graffunder 11 KBO R. Kuplin 1 vii PAGE viii CONTRIBUTORS TO AAVSO DATA ON R SCUTI (cont'd) 1985 - 1990 KCF C. Kurtz 11 NMN J. Neuman 10 SGU G. Sari 10 LDT T. Ladanyi 16 NTS T. Norton 24 SVT T. Saville 10 LAR R. Lambert 6 NOG G. Nowak 23 SIR D. Schiller 2 LMF M. Lara 45 OBG G. O'Brien 14 SSC S. Schimpf 6 LTN T. Larsen 1 OCN S. O'Connor 5 SMF F. Schmidt 24 LKG K. Larson 4 OER E. Ofek 60 SRD R. Schmidt 2 LDR D. Laurent 1 ON L. Ondra 2 SCY A. Schroyens 17 LJS J. Lavigne 9 OV E. Oravec 189 SCZ E. Schweitzer 78 LZT T. Lazuka 121 OSK K. Osaer 2 SCX E. Sciaroni 7 LKD D. Leake 36 OSV L. Osvald 9 SCE C. Scovil 8 LEB R. Lebert 11 OB D. Overbeek 70 SEZ J. Segonzat 55 LST S. Lecomte 4 PLA A. Padilla-Filho 157 SMV M. Sekiguchi 7 LEG L. Leger 2 PDI D. Palacios 6 SJK J. Semczuk 3 LJN J. Leonard 2 PPS S. Papp 203 SVY N. Severijns 6 LJK J. Lingaas 5 PLI L.Parmeggiani 20 SHS S. Sharpe 163 LKB K. Linsley 28 PN A.Pearlmutter 63 SHQ O. Shemer 62 LOB J.Lobo-Rodriguez 12 P L. Peltier 1 SIO H. Shioi 18 LWT T. Lohvinenko 2 PMR M. Perala 50 SOF O. Skjaeraasen 3 LLH L. Lopes 12 PAE A. Pereira 139 SJE J. Smith 1 LEJ E. Los 12 PZA A.Perez-Revilla 218 SMQ M. Smith 18 LVT J. Lovett 8 PML M. Perrot 7 SRV R. Smith 17 LX W. Lowder 286 PFK F. Pesci 24 SSZ Z. Soos 15 LTB T. Lubbers 89 PSO S. Pesci 12 SJZ J. Speil 248 LKS R. Lukas 2 POD D.Pestana-Galvan 43 SFJ F. St. Louis 1 LBB B. Lux 10 PZP P. Petrovitz 4 STI P. Steffey 3 MDH H. Maddocks 4 PED D. Pettengill 6 SGP P. Stegmann 2 MEK J. Manek 6 PFA J.Pfannerstill 3 SET C. Stephan 65 MJZ J. Manzorro 11 PKT J. Pickett 2 STF G.Stephanopoulos 195 MJU J. Marioni 17 PKI O. Piechowski 4 SWT R. Stewart 6 MJG J. Martin 5 PIJ J. Piriti 23 STQ N. Stoikidis 10 MTQ E.Martin-Mateos 34 PLR R. Poole 6 SUK M. Stuka 4 MZQ D.Martinez-Delgado 1 PSZ K.Posztobanyi 1 SGH H. Sugai 5 MJH J. Martins 6 POX M. Poxon 25 SGA G. Sule 1 MGE G.Mavrofridis 22 PDQ D. Proust 14 SUS D. Sussman 63 MJW J. Mayer 49 QRP P. Queitsch 5 SVN P. Sventek 23 MDV D. McCollum 56 RKE K. Raetz 12 SWV D. Swann 33 MGG G. McGinnis 2 RKM M. Raetz 15 SBG G. Szabo 2 MKJ J. McKenna 15 RPY P. Rapavy 1 SBT R. Szabo 3 MBC B. McMillan 7 RHT H. Rauschka 1 SZW R. Szaj 62 MSD D. Means 4 RCQ R. Recsek 5 SZX Z. Szalma 11 MED K. Medway 2 REP P. Reinhard 6 SKV L. Szarka 27 MDG D. Megginson 45 RNT C. Reinhart 1 SAO A. Szauer 29 MEH C. Meinhardt 1 REN J. Renault 39 SOO A. Szollosi 9 MHI H. Menali 57 RYS M. Reynolds 4 SUC L. Szucs 1 MNZ E. Meneguzzo 15 RJI J. Riggs 4 SUZ P. Szutor 1 MPY P. Meyers 26 RFE F. Rodrigues 22 TAM M. Talero 12 MDI I. Middlemist 21 ROP P. Rodrigues 6 TZR R. Tanzer 2 MIU M. Mikutis 12 RGP P. Roggemans 13 TDB D. Taylor 5 MTL R. Milton 1 RJA J. Rohart 2 TSZ S. Teichner 17 MJI J. Miner 5 RB D.Rosebrugh 253 TPS I. Tepliczky 38 MUK U. Mitra 6 RGB G. Rosenberg 2 TSE S. Terabayashi 17 MZS A. Mizser 268 RLU L. Rossi 26 TMS F. Termis-Soto 5 MCE E. Mochizuki 37 RMV M. Rowe 7 TMR R. Thomas 1 MMI M. Moeller 89 RR R. Royer 1 THR R. Thompson 90 MOD D. Mohrbacher 22 RJV J. Ruiz 32 TBC B. Tic 21 MMM M. Momose 54 RAN A. Rutter 2 TSV S. Tindlund 1 MDE D. Monger 13 RPJ P. Ryan 10 TSR I. Tiszinger 3 MOR R. Monske 4 SJC J. Sadow 3 TJO J. Tobin 8 MJ A. Montague 7 SGT T. Sagodi 20 TMB M. Tombelli 7 MOA A. Montanelli 5 SJU J.Saint-Jouan 8 TRT T. Tordai 3 MAO A. Morbidelli 7 SJQ A. Sajtz 90 TTK K. Toth 2 MOI E. Morillon 18 SSU S. Sakuma 155 TFN F. Traynor 7 MOQ R. Morishita 10 SRL R. Sala 4 TDM D. Troiani 3 MYM M. Moriyama 7 SEQ E. Salazar 23 TJC J. Truax 2 MOW W. Morrison 198 SAH G. Samolyk 6 TYD D. Tyler 3 MDU D. Mulinski 33 SSR R. Sampson 79 MUI M. Uberti 2 MKU K. Murase 8 SEF F. Sanchez 4 UND G. Underhay 8 MSU S. Murphy 21 SNZ J. Sanchez 17 VAI J. Vaidis 4 MUY E. Muyllaert 32 SNL J. Sandel 10 VDS J. Valdes 1 NZO Z. Nagy 37 SSX A. Santos 1 VNL F. Van Loo 14 NMA A.Nagy-Melikuti 5 SGI M. Santos 25 VWS J. Van Wassenhove 2 NKA K. Narumi 25 SPQ C. Sapi 2 VPL P. Varela 2 viii PAGE ix CONTRIBUTORS TO AAVSO DATA ON R SCUTI (cont'd) 1985 - 1990 VVR R. Vavrek 1 WGL D. Wahlgren 1 WMR R. Williams 5 VED P. Vedrenne 195 WKP P. Walker 15 WLM T. Williams 1 VMA M. Velasco 1 WMA M. Watanabe 9 WJY J. Wilms 31 VEL P. Velasco 22 WTT T. Watanabe 28 WLP P. Wils 6 VET M. Verdenet 6 WNY Y. Watanabe 11 WJA J. Wilson 8 VIA J. Vialle 52 WER R. Weber 5 WSN T. Wilson 1 VNZ Z. Vician 45 WK F. Welker 4 WCL C. Womack 69 VRA J. Vieira 32 WC R. Wend 86 WNG L. Wong 10 VIM L. Vimlati 26 WET T. Weselak 11 WJM J. Wood 5 VGJ G. Vinci 7 WEM M. Wesolowski 3 WUN E. Wunder 28 VII I. Vincze 26 WEF F. West 723 YAM M. Yamada 36 VIT F. Violat 49 WJD J. West 4 YUR J. Yurchesyn 4 VFK F. Vohla 31 WRA R. West 42 ZAG G. Zajacz 12 VOI P. Voith 1 WYT T. Weyenberg 8 ZLT T. Zalezsak 13 VJS S. Vojtech 24 WHI S. Whitney 15 ZAM M. Zanotta 10 VOL W. Vollmann 38 WTK K. Wieszt 77 ZUT S. Zanut 28 VYP P. Vuylsteke 4 WJT J. Wilcox 2 ZIN S. Zinn 4 WGJ G. Waffen 1 WPX P. Williams 4 CONTRIBUTING ASTRONOMICAL ORGANIZATIONS 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) Berliner Arbeitsgemeinschaft fur Veranderliche Sterne (West Germany) British Astronomical Association, Variable Star Section (England) British Astronomical Association of New South Wales (Australia) Liga Ibero-Americana de Astronomia (South America) 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) Pleione Valtozocsillageszlelo Halozat (Hungary) Red de Observatores de Estrellas Variables - MIRA (Spain) Royal Astronomical Society of Canada Royal Astronomical Society of New Zealand, Variable Star Section Scandinavian Astronomisk Selskap Uniao Brasileira de Astronomia, Variable Star Commission (Brazil) Variable Star Observers League in Japan Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium) ix PAGE x 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 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 SCUTI LIGHT CURVES 1985 - 1990