PAGE i A H H E R C U L I S L I G H T C U R V E S 1 9 6 3 - 1 9 9 5 AAVSO MONOGRAPH 8 This monograph is dedicated to Lewis M. Cook 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 Lewis M. Cook Clinton B. Ford Additional funds provided by AAVSO Members International Astronomical Union (IAU) ------------------------------------------------------------------------------- PAGE ii ISBN 1-878174-19-3 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 AH Herculis vii Information on AH Herculis ix Key to Symbols ix Long-term Light Curve of AH Herculis, 1963 - 1995 1 Expanded Light Curves of AH Herculis, 1963 - 1995 5 ------------------------------------------------------------------------------- PAGE iv is blank ------------------------------------------------------------------------------- PAGE v AH HERCULIS LIGHT CURVES, 1963 - 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. AH Herculis Light Curves, 1963 - 1995 AAVSO Monograph 8 contains light curves of the dwarf nova-type (Z Camelopardalis subtype) cataclysmic variable AH Herculis from September 1963 through December 1995 (JD 2438295 - 2450083). The AAVSO long-term light curve of AH Herculis from September 1963 through December 1995 (JD 2438295 - 2450083) is presented on pages 1 - 4. This light curve has been included to give a more complete picture of AH Herculis' behavior. The observations that comprise this light curve are visual and come from the AAVSO International Database. The data from September 1959 - when AH Herculis was added to the AAVSO observing program - to September 1963 have been published in AAVSO Quarterly Report 26 (1959 - 1960), AAVSO Quarterly Report 27 (1960 - 1961), and AAVSO Report 29 (1961 - 1963). Pages 5 through 64 contain computer-generated expanded light curves from September 1963 through December 1995, 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 AH Herculis and a Key to Symbols are given on page ix. The observations in this monograph are the contributions of AAVSO members or observers in the United States and abroad. 344 observers have contributed 26,307 observations to the light curves from September 1963 through 1995. The names and observer codes of these observers are given on pages vii through viii. Organizations whose members have contributed observations to the AAVSO either individually or through their organization are listed on page viii. In preparing the data for publication in this monograph, each of the observations was evaluated 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 1963 through 1995 included in this monograph 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. v ------------------------------------------------------------------------------- PAGE vi Acknowledgements We dedicate AAVSO Monograph 8 to Lewis M. Cook, who has contributed generously towards 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 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 and monograph supplements. We acknowledge with thanks the computer support of the Smithsonian Astrophysical Observatory for the processing of part of the data and data preservation. The evaluation of the data and the preparation of this monograph 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 of 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. Benjamin D. Oppenheimer helped with preliminary evaluation of a portion of the data. Barbara Silva, Donna Eldridge, Douglas Van Orsow, Young Lim, and Michael Bickford, and several 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 August 1996 vi ------------------------------------------------------------------------------- PAGE vii CONTRIBUTORS TO AAVSO DATA ON AH HERCULIS 1963 - 1995 AAP ABBOTT, A. PATRICK 17 | DTE DESLIJPERE, TOMMY 9 | AMT ADAMS, MARK T. 46 | DAU DEY, ARJUN 3 | AB ALBRECHT, WILLIAM 362 | DJN DICKINSON, JON J. 3 | ALG ALDERING, GREGORY 17 | DHD DIEDRICH, DELORNE 1 | ALN ALLISON, RUDIE J. 9 | DPA DIEPVENS, ALFONS 356 | ALS ALLMAND, STEPHEN 3 | DMN DIERICK, DOMINIQUE 43 | ALL ALLRED, LANCE 1 | DRG DIETHELM, ROGER 54 | AOD ANDERSEN, ODD'IVAR 2 | DRD DIETZ, RICHARD D. 1 | AK ANDERSON, CARL A. 2 | DLA DILL, ALBERT G. 31 | AC ANDERSON, CURTIS E. 7 | DIL DILLON, WILLIAM G. 36 | ANN ANNAL, ROBERT J. 358 | MDS DIONISI, MASSIMO 3 | ARI ARIAIL, ROBERT B. 138 | DRX DIXON, ROBERT 4 | BYG BABCSANY, GABOR 1 | DPL DOMBROWSKI, PHILIP 384 | BOZ BAGO, BALAZS 4 | DMR DOMEN, RONALD 1 | BM BALDWIN, MARVIN E. 2 | DZM DONZEL, MARC 1 | BWK BARKSDALE, WILLIAM 12 | DRY DUCOTY, RICHARD B. 73 | BSF BARNHART, STEPHEN 25 | DLP DUNLOP, STORM R. 1 | BAU BAUER, JOHANN 40 | DUP DUPASQUIER, PAUL 29 | BUJ BAUMERT, JOHN H. 1 | DUR DURUY, MAURICE V. 24 | BEK BECK, INEZ 1 | DKS DVORAK, SHAWN 1 | BKK BECKMANN, KENNETH 1 | DGP DYCK, GERALD P. 1373 | BJS BEDIENT, JAMES R. 2 | ECJ ECKENDORF, JAMES H. 17 | BNY BENGE JR., RAYMOND 2 | EDG EDGERTON, BRIAN J. 1 | BTY BENNER, TERRY 250 | EM EMERSON, GARY P. 6 | BML BERNSTROM, MARVIN 83 | EJT EMMERT, JOHN T. 4 | BIC BICHON, LAURENT 1 | FSV FALVO, SAMUEL A. 1 | BMM BIESMANS, MARC 4 | FCA FAUSEL, CHARLES A. 9 | BIL BILODEAU, GERALD A. 1 | FJH FEIJTH, HENDRIK 38 | HUO BLOOM, DONNA J. 36 | FKJ FEKETE, JANOS 9 | BAX BOATTINI, ANDREA 1 | FET FETTERMAN, THOMAS 56 | BOH BOHME, DIETMAR 2 | FRF FIDRICH, ROBERT 79 | BOD BOHN, DENNIS 39 | FDV FISHER, DAVID A. 6 | BOI BOIS, BERNARD 13 | FEM FLYNN, EDWARD M. 13 | BYR BONDONO, JEFFERY R. 12 | FSE FOGLIA, SERGIO 1 | BVL BONNEVILLE, DIDIER 1 | FFC FOLDESI, FERENC 6 | BOR BORNHURST, LARRY 2 | FD FORD, CLINTON B. 95 | BRJ BORTLE, JOHN E. 1267 | FRH FRICH, ARNAND 11 | BZC BORZELLI, CARMINE 1 | FRI FRIGON, LEON A. 1 | BJB BOSCH, JEAN-GABRIEL 2 | FMG FUGMAN, GARY C. 47 | BMU BOUMA, REINDER J. 20 | GBZ GABZO, OFER 61 | BTB BRETL, THOMAS C. 100 | GAZ GARSZTKA, J. 12 | BSM BRINCAT, STEPHEN M. 66 | GAY GAYDOS, MARK 4 | BOS BROENS, ERIC 72 | GJN GENSLER, JAN 7 | BRK BROOKS, JAMES E. 2 | GSR GESCHWIND, RALPH 5 | BOA BRUNO, ALAIN 14 | GGT GLENN, GARY 14 | BRY BRYAN JR., JAMES T. 34 | GFB GOFF, WILLAM 38 | BYD BRYDEN, ROBERT K. 98 | GOP GOODWIN, PAUL N. 117 | BUO BUENO, ANTONIO T. 6 | GGH GOUGH, THOMAS 3 | BUW BUHROW, ROSS 24 | GRL GRANSLO, BJOERN H. 201 | BTH BURROWS, THOMAS A. 120 | GRW GREEN, DANIEL W. E. 4 | CBA CABRERA RODRIGUEZ, ANGEL 1 | GRI GRIESE III, JOHN W. 374 | CIA CAMURRI, LUCA 3 | GSC GROS, CHRISTIAN 12 | CEA CANDELA, BERNARD 18 | GRZ GRZELCZYK, HEINZ 258 | CTB CARTER, BRIAN A. 14 | GUB GUBBELS, GUIDO 20 | CNT CHANTILES, DEAN 22 | GHD GUIDRY, HOWARD 14 | CGF CHAPLE JR., GLENN F. 390 | GUN GUNTHER, JEAN 161 | CHR CHOATE, ROBERT 1 | HTY HAGER, TIMOTHY 60 | CLG CLUYSE, LUDWIG 1 | HK HALBACH, EDWARD A. 47 | COL COLLINS, PETER L. 1 | HSG HANSON, GENE 141 | CMG COMELLO, GEORG 18 | HRR HARRINGTON, PHILIP 1 | CGG CONLIN, GREGORY 45 | HAV HARVAN, RICHARD P. 39 | COO COOK, LEWIS M. 82 | HAY HAYDEN, EDWARD R. 20 | CK COOK, STEPHEN P. 1 | HAB HAYS JR., ROBERT H. 511 | CLX COX, LOUIS B. 20 | HZL HAZEL, LAWRENCE 21 | CR CRAGG, THOMAS A. 71 | HEF HEIFNER, MARK A. 380 | CCO CUBILLO, CARLOS F. 2 | HRI HILL, RICHARD E. 69 | DAH DAHLE, HAAKON 47 | HIR HIRASAWA, YASUO 1 | DAK DANSKIN, KEITH H. 1 | HOO HOOGEVEEN, GEERT 3 | DAJ DAVIS, JACK F. 36 | HOP HOPP, ULRICH 10 | DEY DE YOUNG, JAMES A. 8 | HRB HORNBY, PETER W. 3 | DFF DEFFAYET, CEDRIC 3 | HSF HOSSFIELD, CASPER 8 | DEA DEMARTINO, ROBERT 9 | HSR HOSTE, SERGE 35 | DEK DEQUICK, KURT 7 | HOW HOWARTH, IAN D. 18 | HUH HUGHES JR., HARRY 5 HR HURLESS, CAROLYN J. 450 HTD HUTTER, DONALD J. 3 IML IDEM, MICHAEL 16 JM JAMES, ROBERT A. 37 JJT JEFFREY, J. THOMAS 21 JLT JENSEN, LASSE TEIST 144 JCH JOHANNINK, C. 1 JOG JOHNSON, GUS E. 6 JOR JONES, ROBERT H. 1 KB KAMINSKI, WALTER J. 18 KLY KELLEY JR., GEORGE 322 KRB KING, ROBERT P. 15 KBS KIRBY-SMITH, HENRY 5 KIL KISS, LASZLO 8 KSP KNIGHT, STEPHEN P. 20 KOJ KNOX, OSWALD J. 108 KOC KOCSIS, ANTAL 1 KKF KOEHLER, KARL F. 1 KRS KOLMAN, ROGER S. 45 KRT KORTH, STEFAN 136 KKO KOSS, KAREL 4 KVI KOVACS, ISTVAN 3 KJI KRTICKA, JIRI 21 KPG KUIPERS, GAUKE 1 LGT LACASSIN, GILBERT 135 LTW LANGHANS, THOMAS W. 60 LKG LARSON, KEVIN G. 32 LWS LAWSON, MIKE 2 LEB LEBERT, ROLAND 5 LWT LOHVINENKO, TODD W. 3 LGV LOPATYNSKI, GARY V. 12 LRD LORING, DANIEL P. 1 LOL LORSIGNOL, JEAN 5 LOS LORSIGNOL, SERGE 1 LVT LOVETT, JAMES 34 LX LOWDER, WAYNE M. 218 LBG LUBCKE, GILBERT C. 107 LS LUCAS, DIANE 122 LCG LUDWIG, CLUYSE 3 MDD MADDEN, PATRICK J. 68 MKE MANSKE, ROBERT P. 1 MJZ MANZORRO, JUAN 3 MCO MARCARIO, MIKE 3 MIC MARILLER, C. 15 MYA MASSEY, ANDREW 1 MTO MATEO, MARIO 1 MTH MATSUYAMA, HIROSHI 32 MPR MAURER, PETER 9 MGE MAVROFRIDIS, GEORGE 4 MYW MAYER JR., ERNST W. 22 MYR MAYER, ERNST H. 1227 MGG MCGINNIS, GARY L. 18 MKJ MCKENNA, JEROME F. 272 MBC MCMILLAN, BETTY P. 21 MED MEDWAY, KENNETH J. 85 MMY MEYER, MAIK 6 MEZ MEZOSI, CSABA 14 MDI MIDDLEMIST, IAN A. 3 MOK MIDTSKOGEN, ORNULF 462 MKD MILLYARD, KAI 7 MIS MINOIS, JOEL 64 MZS MIZSER, ATTILA 78 MRV MODIC, ROBERT J. 147 MOX MOELLER, GERHARD 1 MMI MOELLER, MICHAEL 130 MGJ MOGELINSKI, JERRY 10 MAR MONELLA, RINALDO 2 MOR MONSKE, ROBERT L. 126 MJ MONTAGUE, ALLEN C. 122 MOJ MORGAN, JAMES E. 226 MOI MORILLON, ERIC 8 M61 MURDOCH, J. N. 1 vii ------------------------------------------------------------------------------- PAGE viii CONTRIBUTORS TO AAVSO DATA ON AH HERCULIS (continued) 1963 - 1995 NEW NEWBERRY, MICHAEL 7 | SCE SCOVIL, CHARLES E. 415 | NGU NGUYEN, JEAN-JACQUES 1 | SEZ SEGONZAT, JACQUES 1 | NBY NORDBY, JOHN M. 37 | SDA SHARPE, DOUGLAS 1 | NVK NOVAK, MICHAEL 1 | SHS SHARPE, STEVEN B. 4 | OES OESPER, DAVID 1 | SSA SHARPLESS, ALBERT 2 | OER OFEK, ERAN 13 | SHC SHELLEY, CRAIG A. 1 | OGR OGDEN, RICHARD H. 4 | SHQ SHEMMER, OHAD 10 | OJR OSORIO, JOSE RIPERO 277 | SHB SHERROD, CLAY 10 | OB OVERBEEK, M. DANIEL 1 | SNW SHIPMAN, JOHN W. 10 | PPS PAPP, SANDOR 205 | SLH SHOTTER, LAWRENCE 17 | PRN PATRICK, RAYMOND M. 43 | SKL SIMMONS, KARL 14 | PCE PEARCE, ERIC C. 3 | SNE SIMMONS, NEIL A. 48 | PEI PEDERSEN, EIGIL 6 | SPN SIMPSON, A. 1 | P PELTIER, LESLIE C. 782 | SKP SKALAK, PETR 27 | PMR PERALA, MARTTI R. 71 | SKT SKOTTEGARD, PETER 1 | PZA PEREZ-REVILLA, ALAIN 139 | SMH SMITH, CHRIS J. 1 | PED PETTENGILL, DWYNAL 24 | SJ SMITH, J. RUSSELL 9 | PTZ PIETZ, JOCHEN 90 | SC SPRATT, CHRISTOPHER 41 | PBE PIOLON, BENGT 1 | STR STANTON, RICHARD H. 16 | POX POXON, MICHAEL 53 | SKS STECKNER, THOMAS 7 | PYG POYNER, GARY 149 | STF STEFANOPOULOS, GEORGE 5 | PRI PRICE, LELAND 10 | STI STEFFEY, PHILIP C. 146 | PDQ PROUST, DOMINIQUE 1 | SPU STEPAN, PETR 40 | PUJ PUJOL, FRANCISCO 11 | SET STEPHAN, CHRISTOPHER 18 | RAA RAASCH, RICHARD W. 7 | SDR STEPHENS, ROBERT D. 1 | RRB RAPHAEL, ROBERT B. 5 | SWT STEWART, ROBERT J. 153 | RNT REINHART, CHARLES 2 | SQA STROBBE, JAN 7 | RIR RIETH, RALPH 9 | SUX SUAREZ, MAXIMO 3 | RJI RIGGS, JOHN I. 12 | SGM SUGARMAN, MICHAEL 3 | RPR ROBBINS, PHILLIP 117 | SUL SULLIVAN, CHARLES 28 | RHY ROCHE, HYMAN 2 | SUR SURAWSKI, URSULA E. 35 | RLU ROSSI, LUIGI 1 | SVN SVENTEK, PAUL L. 142 | RGL ROTEM, GILAD 13 | SB SWANBERG, ROBERT F. 99 | RR ROYER, RONALD E. 7 | SSW SWIERCZYNSKI, STANISLAW 9 | SSU SAKUMA, SEI-ICHI 11 | SDX SWORIN, DAVID J. 30 | SAH SAMOLYK, GERARD 1 | SBT SZABO, ROBERT 46 | SNL SANDEL, JEFF G. 9 | SKV SZARKA, LEVENTE 27 | SPQ SAPI, CSABA 3 | SNO SZENTASKO, LASZLO 81 | SVT SAVILLE, THOMAS G. 4 | SOO SZOLLOSI, ATTILA 6 | SAW SAW, DOUGLAS R. B. 35 | TDB TAYLOR, DANIEL 3 | SV SCHMITZ, VICKI 7 | TM THOMAS, HOWARD D. 7 | SCZ SCHWEITZER, EMILE 222 | TJ THOMAS, JAMES 123 | TMR THOMAS, RONALD P. 2 THU THOUET, BERNARD 4 TSC TRACY, SCOTT 16 TDM TROIANI, DANIEL M. 11 TRR TROMMER, DIRK 2 VCP VAN CAUTEREN, PAUL 14 VER VAN DER ENDE, BARRY 3 VNL VAN LOO, F. R. 81 VDL VANDERLOOY, JOHAN 1 VMT VANMUNSTER, TONNY 31 VZS VARGA, ZSAZSA 1 VED VEDRENNE, PAUL 34 VET VERDENET, MICHEL 1232 VGP VIGNIER, PHILLIPE 101 VGJ VINCI, GREGORY J. 19 VIS VISOCKI, GARY 7 VJC VLASIC, JOHN C. 2 VJS VOJTECH, SIMON 7 VOL VOLLMANN, WOLFGANG 6 WNF WASSON, NORMAN F. 1 WRG WATSON III, ROBERT 23 WER WEBER, RICHARD J. 176 WEI WEIER, DAVID D. 50 WC WEND, RICHARD E. 3 WDM WESTLUND, MARGARETA 1 WJ WHITEHEAD, JAMES M. 1 WI WILLIAMS, DAVID B. 32 WLM WILLIAMS, THOMAS R. 1 WJY WILMS, JOHNNY 2 WLP WILS, PATRICK 93 WDN WILSON, DANNY RAY 2 WSN WILSON, THOMAS W. 14 WNB WINGATE, BRUCE I. 19 WTN WITTEN, BLAKE C. 4 WHR WOHLEVER, RICHARD 2 YRK YORK, DAVID O. 538 ZLT ZALEZSAK, TAMAS 9 ZAM ZANOTTA, MAURO 1 ZPA ZELLER, PAUL A. 1 ZMM ZIMMERMAN, DENNIS 9 ZRE ZISSELL, RONALD E. 24 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 de Astronomia, Variable Star Commission (Brazil) Unione Astrofili Italiani (UAI) Variable Star Observers League in Japan Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium) viii ------------------------------------------------------------------------------- PAGE ix INFORMATION ON AH HERCULIS Right Ascension Declination Position: (1900) 16h 40m 02s +25 degrees 26.2' (1950) 16 42 06 +25 20.6 (2000) 16 44 10 +25 15.1 Type: Cataclysmic variable - Z Camelopardalis-type dwarf nova, which shows standstills (halts in the normal decline about one-third of the way from maximum) that can last from weeks to years. Average Outburst Frequency: 19.8 days Orbital Period: 6.1948 hours Spectrum: K2 - M0 Mass Ratio (primary/secondary): 1.25 +/- 0.08 Mass (primary): 0.95 +/- 0.10 Mo Mass(secondary): 0.76 +/- 0.08 Mo Orbital Inclination: 46 degrees +/- 3 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. ix ------------------------------------------------------------------------------- PAGE x AH HERCULIS LIGHT CURVES 1963 - 1995 ------------------------------------------------------------------------------- PAGES 1 - 4 Caption for long-term light curve Pages 1 - 4: AAVSO long-term light curve of 1640+25 AH Herculis for JD 2438295 - 2450083 (September 1963 - December 1995). All observations are visual and are taken from the AAVSO International Database. -----------------END OF FILE---------------------------------------------------