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Download This Issue (Pdf) Volume 46 Number 1 JAAVSO 2018 The Journal of the American Association of Variable Star Observers Optical Flares and Quasi-Periodic Pulsations on CR Draconis during Periastron Passage Upper panel: 2017-10-10-flare photon counts, time aligned with FFT spectrogram. Lower panel: FFT spectrogram shows time in UT seconds versus QPP periods in seconds. Flares cited by Doyle et al. (2018) are shown with (*). Also in this issue... • The Dwarf Nova SY Cancri and its Environs • KIC 8462852: Maria Mitchell Observatory Photographic Photometry 1922 to 1991 • Visual Times of Maxima for Short Period Pulsating Stars III • Recent Maxima of 86 Short Period Pulsating Stars Complete table of contents inside... The American Association of Variable Star Observers 49 Bay State Road, Cambridge, MA 02138, USA The Journal of the American Association of Variable Star Observers Editor John R. Percy Kosmas Gazeas Kristine Larsen Dunlap Institute of Astronomy University of Athens Department of Geological Sciences, and Astrophysics Athens, Greece Central Connecticut State University, and University of Toronto New Britain, Connecticut Toronto, Ontario, Canada Edward F. Guinan Villanova University Vanessa McBride Associate Editor Villanova, Pennsylvania IAU Office of Astronomy for Development; Elizabeth O. Waagen South African Astronomical Observatory; John B. Hearnshaw and University of Cape Town, South Africa Production Editor University of Canterbury Michael Saladyga Christchurch, New Zealand Ulisse Munari INAF/Astronomical Observatory Laszlo L. Kiss of Padua Editorial Board Konkoly Observatory Asiago, Italy Geoffrey C. Clayton Budapest, Hungary Louisiana State University Nikolaus Vogt Baton Rouge, Louisiana Katrien Kolenberg Universidad de Valparaiso Universities of Antwerp Valparaiso, Chile Zhibin Dai and of Leuven, Belgium Yunnan Observatories and Harvard-Smithsonian Center David B. Williams Kunming City, Yunnan, China for Astrophysics Whitestown, Indiana Cambridge, Massachusetts The Council of the American Association of Variable Star Observers 2017–2018 Director Stella Kafka President Kristine Larsen Past President Jennifer L. Sokoloski 1st Vice President Bill Stein 2nd Vice President Kevin B. Marvel Secretary Gary Walker Treasurer Robert Stephens Councilors Richard Berry Katrien Kolenberg Tom Calderwood Arlo Landolt Michael Cook Gordon Myers Joyce A. Guzik Gregory R. Sivakoff Michael Joner ISSN 0271-9053 (print) ISSN 2380-3606 (online) JAAVSO The Journal of The American Association of Variable Star Observers Volume 46 Number 1 2018 AAVSO 49 Bay State Road ISSN 0271-9053 (print) Cambridge, MA 02138 ISSN 2380-3606 (online) USA Publication Schedule The Journal of the American Association of Variable Star Observers is published twice a year, June 15 (Number 1 of the volume) and December 15 (Number 2 of the volume). The submission window for inclusion in the next issue of JAAVSO closes six weeks before the publication date. A manuscript will be added to the table of contents for an issue when it has been fully accepted for publication upon successful completion of the referee process; these articles will be available online prior to the publication date. An author may not specify in which issue of JAAVSO a manuscript is to be published; accepted manuscripts will be published in the next available issue, except under extraordinary circumstances. Page Charges Page charges are waived for Members of the AAVSO. Publication of unsolicited manuscripts in JAAVSO requires a page charge of US $100/page for the final printed manuscript. Page charge waivers may be provided under certain circumstances. Publication in JAAVSO With the exception of abstracts of papers presented at AAVSO meetings, papers submitted to JAAVSO are peer-reviewed by individuals knowledgable about the topic being discussed. We cannot guarantee that all submissions to JAAVSO will be published, but we encourage authors of all experience levels and in all fields related to variable star astronomy and the AAVSO to submit manuscripts. We especially encourage students and other mentees of researchers affiliated with the AAVSO to submit results of their completed research. Subscriptions Institutions and Libraries may subscribe to JAAVSO as part of the Complete Publications Package or as an individual subscription. Individuals may purchase printed copies of recent JAAVSO issues via Createspace. Paper copies of JAAVSO issues prior to volume 36 are available in limited quantities directly from AAVSO Headquarters; please contact the AAVSO for available issues. Instructions for Submissions The Journal of the AAVSO welcomes papers from all persons concerned with the study of variable stars and topics specifically related to variability. All manuscripts should be written in a style designed to provide clear expositions of the topic. Contributors are encouraged to submit digitized text in MS WORD, LATEX+POSTSCRIPT, or plain-text format. Manuscripts may be mailed electronically to [email protected] or submitted by postal mail to JAAVSO, 49 Bay State Road, Cambridge, MA 02138, USA. Manuscripts must be submitted according to the following guidelines, or they will be returned to the author for correction: Manuscripts must be: 1) original, unpublished material; 2) written in English; 3) accompanied by an abstract of no more than 100 words. 4) not more than 2,500–3,000 words in length (10–12 pages double-spaced). Figures for publication must: 1) be camera-ready or in a high-contrast, high-resolution, standard digitized image format; 2) have all coordinates labeled with division marks on all four sides; 3) be accompanied by a caption that clearly explains all symbols and significance, so that the reader can understand the figure without reference to the text. Maximum published figure space is 4.5” by 7”. When submitting original figures, be sure to allow for reduction in size by making all symbols, letters, and division marks sufficiently large. Photographs and halftone images will be considered for publication if they directly illustrate the text. Tables should be: 1) provided separate from the main body of the text; 2) numbered sequentially and referred to by Arabic number in the text, e.g., Table 1. References: 1) References should relate directly to the text. 2) References should be keyed into the text with the author’s last name and the year of publication, e.g., (Smith 1974; Jones 1974) or Smith (1974) and Jones (1974). 3) In the case of three or more joint authors, the text reference should be written as follows: (Smith et al. 1976). 4) All references must be listed at the end of the text in alphabetical order by the author’s last name and the year of publication, according to the following format: Brown, J., and Green, E. B. 1974, Astrophys. J., 200, 765. Thomas, K. 1982, Phys. Rep., 33, 96. 5) Abbreviations used in references should be based on recent issues of JAAVSO or the listing provided at the beginning of Astronomy and Astrophysics Abstracts (Springer-Verlag). Miscellaneous: 1) Equations should be written on a separate line and given a sequential Arabic number in parentheses near the right-hand margin. Equations should be referred to in the text as, e.g., equation (1). 2) Magnitude will be assumed to be visual unless otherwise specified. 3) Manuscripts may be submitted to referees for review without obligation of publication. Online Access Articles published in JAAVSO, and information for authors and referees may be found online at: https://www.aavso.org/apps/jaavso/ © 2018 The American Association of Variable Star Observers. All rights reserved. The Journal of the American Association of Variable Star Observers Volume 46, Number 1, 2018 Editorial Editorial: What Use Is Astronomy? John R. Percy 1 Variable Star Research CCD Photometry and Roche Modeling of the Eclipsing Deep Low Mass, Overcontact Binary Star System TYC 2058-753-1 Kevin B. Alton 3 A Photometric Study of the Eclipsing Binary NSV 1000 Thomas J. Richards, Colin S. Bembrick 10 A 1,574-Day Periodicity of Transits Orbiting KIC 8462852 Gary Sacco, Linh D. Ngo, Julien Modolo 14 Optical Flares and Quasi-Periodic Pulsations (QPPs) on CR Draconis during Periastron Passage Gary Vander Haagen 21 A Photometric Study of the Contact Binary V737 Cephei Edward J. Michaels 27 KIC 8462852: Maria Mitchell Observatory Photographic Photometry 1922 to 1991 Michael Castelaz, Thurburn Barker 33 Observations, Roche Lobe Analysis, and Period Study of the Eclipsing Contact Binary System GM Canum Venaticorum Kevin B. Alton, Robert H. Nelson 43 The Dwarf Nova SY Cancri and its Environs Arlo U. Landolt, James L. Clem 50 First Precision Photometric Observations and Analyses of the Totally Eclipsing, Solar Type Binary V573 Pegasi Ronald G. Samec, Daniel B. Caton, Danny R. Faulkner 57 Sparsely-Observed Pulsating Red Giants in the AAVSO Observing Program John R. Percy 65 Variable Star Data Recent Maxima of 86 Short Period Pulsating Stars Gerard Samolyk 70 Visual Times of Maxima for Short Period Pulsating Stars III Gerard Samolyk 74 Recent Minima of 172 Eclipsing Binary Stars Gerard Samolyk 79 Table of Contents continued on following pages Review Paper The Variability of Young Stellar Objects: An Update William Herbst 83 Abstracts of Papers Presented at the 106th Annual Meeting of the AAVSO, Held in Nashville, Tennessee, November 2–4, 2017 AAVSO Target Tool: A Web-Based Service for Tracking Variable Star Observations Dan Burger, Keivan G. Stassun, Chandler Barnes, Sara Beck, Stella Kafka, Kenneth Li 85 Period Variation in BW Vulpeculae David E. Cowall, Andrew P.
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