JAAVSO Volume 48 Number 1, 2020 is published

http://www.aavso.org/apps/jaavso/volumes/

The printed version of this issue will be available soon. Please watch for the announcement on our main web page.

The Journal of the American Association of Variable Star Observers
Volume 48, Number 1, 2020

Articles in This Issue

• Editorial
  • Dual-Anonymous Review

    Nancy D. Morrison

• Variable Star Research
  • QZ Carinae—Orbit of the Two Binary Pairs

    Mark Blackford, Stan Walker, Edwin Budding, Greg Bolt, Dave Blane, Terry Bohlsen, Anthony Moffat, Herbert Pablo, Andrzej Pigulski, Adam Popowicz, Gregg Wade, Konstanze Zwintz

  • A Note on Bimodal Pulsating Red Giants

    John R. Percy

  • The Photometric Period of Nova V2891 Cygni

    Richard E. Schmidt

  • The Reclassification of NSV 1586 from a Suspected Cepheid Star to a UG Class System

    Stephen M. Brincat, Charles Galdies, Kevin Hills, Winston Grech

  • Disk Instabilities Caused the 2018 Outburst of AG Draconis

    Helena M. Richie, W. M. Wood-Vasey, Lou Coban

  • Continued Period Changes in BW Vulpeculae

    David E. Cowall, Brian A. Skiff, Andrew P. Odell

  • ASAS-SN Observations of Long Secondary Periods in Pulsating Red Giants

    John Percy, Anthony Mark Wallace

  • HD 121620: A Previously Unreported Variable Star with Unusual Properties

    Roy A. Axelsen

  • CCD Photometry, Light Curve Modeling, and Period Study of the Overcontact Binary Systems NSVS 7245866 and V685 Pegasi

    Kevin B. Alton

  • Period Analysis of All-Sky Automated Survey for Supernovae (ASAS-SN) Data on a Sample of “Irregular” Pulsating Red Giants

    John R. Percy

  • The Photometric Period of V392 Persei (Nova Persei 2018)

    Richard E. Schmidt

  • Light Curve Asymmetries in Three Short Period Eclipsing Binary Stars

    Gage Hahs, Charlyn Ortmann, Vayujeet Gokhale

  • TYC 2402-0643-1: First Precision Photometric Observations and Analyses of the Totally Eclipsing, Solar Type Binary

    Ronald G. Samec, Daniel B. Caton, Danny R. Faulkner

• Education and Outreach
  • Smartphone Astrophotography: A Useful Approach for Outreach and Education

    Sara Bimo

• Instruments, Methods, and Techniques
  • A Gallery of Sky Brightness Curves from the January 2019 Total Lunar Eclipse

    Jennifer J. Birriel, J. Kevin Adkins, Andrea Bertolo, Rainer Ehlert, Michael McKeag, Salvador J. Ribas, Anthony Tekaatch

• Variable Star Data
  • Recent Maxima of 77 Short Period Pulsating Stars

    Gerard Samolyk

  • Recent Minima of 216 Eclipsing Binary Stars

    Gerard Samolyk

  • 35,000 Radial Velocities for 348 Stars from the Tennessee State University Automatic Spectroscopic Telescope

    Joel A. Eaton

• Abstracts
  • 50th Anniversary of the Moon Landing, Personal Stories from Inside the Mission Control Center (Abstract)

    Gordon Myers

  • Novae Erupting within Symbiotic Binaries: Getting Ready for Coming Fireworks (Abstract)

    Ulisse Munari

  • The Frontiers of RR Lyrae and Cepheid Variable Star Research (Abstract)

    Karen Kinemuchi

  • Applying Transformations (Abstract)

    George Silvis

  • O–C Diagrams (Abstract)

    Gary Billings

  • AAVSO Bright Star Monitor Update (Abstract)

    Ken Menzies, Mike Nicholas

  • Czech Pulsational and Exoplanetary Group (Abstract)

    Marek Skarka

  • An Introduction to Observing Sections (Abstract)

    Bert Pablo

  • R Aqr—the 2022 Eclipse Has Started! (Abstract)

    Lee Anne Willson

  • The Challenges of Updating VSX in the Survey Era (Abstract)

    Sebastián Otero

  • How to Use VSX (Abstract)

    Sebastián Otero

  • Human and Environmental Effects of Light Pollution (Abstract)

    Mario Motta

  • Period Changes and the Evolution of Type II Cepheids (Abstract)

    Horace A. Smith, Wayne Osborn, Grzegorz Kopacki, Pradip Karmakar, Barton Pritzl, Nathan De Lee, Charles Kuehn, Aaron LaCluyze, Katie Rabidoux

  • Modeling Cepheid Variable Stars Using the Open-Source MESA Code (Abstract)

    Joyce A. Guzik, Ebraheem Farag, Jakub Ostrowski, Nancy Evans, Hilding Neilson, Sofia Moschou, Jeremy Drake

  • Variable Stars in the LSST Era (Abstract)

    Ardis Herrold

  • The Denouement of the Galactic Novae (Abstract)

    Frederick M. Walter

  • Period Change Behavior of the Eclipsing Binary LS Persei (Abstract)

    Gary Billings

  • Planning a Visual Observing Program (Abstract)

    Michael Cook

  • First Discovery of the Galactic Plane eXoplanet Survey: GPX-1b, a Transiting 15 MJup Companion to a Rapidly Rotating F-type Star (Abstract)

    Paul Benni, Artem Burdanov, Eugene Sokov, Khalid Barkaoui, GPX follow-up team, SOPHIE team, Vadim Krushinsky

  • Update on Professor and Student Survey of NSV RR Lyrae Variable Stars (Abstract)

    Melanie Crowson, David Syndergaard

  • SPP Observing Section (Abstract)

    Melanie Crowson

  • Transform Computations (Abstract)

    George Silvis

  • A New Study of the Variable Star Population in the Hercules Globular Cluster (M13; NGC 6205) (Abstract)

    Dan J. Deras, A. Arellano Ferro, C. Lazaro, I. H. Bustos Fierro, J. H. Calderon, S. Muneer, Sunetra Giridhar

  • Variable Stars in Palomar 13: an Evaporating Globular Cluster (Abstract)

    Mario Alberto Yepez Rivera, Armando Arellano Ferro, Klaus-Peter Schröder, S. Muneer, Sunetra Giridhar, Christine Allen

  • AAVSO Contributions to Year 1 of TESS (Abstract)

    Dennis Conti

  • The Exoplanet Transit Survey and the AAVSO (Abstract)

    Robert Zellem, Anya Biferno, Ethan Blaser, Alexandra Iterralde, Kyle Pearson, John Engelke

  • The New Mittelman Observatory—A Professional Quality Robotic Telescope (Abstract)

    Arne Henden

  • Dorrit Hoffleit, Raymond Berg, and the “Unnamed Fleming Variables”: An Epilogue (Abstract)

    Kristine Larsen

  • Long-time Observations of Visual Solar Observers (Abstract)

    Rodney H. Howe

  • PYTHON Pipeline to Simultaneously Extract Exoplanet and Variable Star Data from TESS Ground-based Followup Observations (Abstract)

    Isobel Snellenberger, Madelyn Madsen, Matt Craig

  • PYTHON for Variable Star Astronomy: A Status Report (Abstract)

    Matt Craig, Isobel Snellenberger, Madelyn Madsen

  • Student Involvement in Exoplanet Science (Abstract)

    Pat Boyce

  • Examples of Variable Stars found in the GNAT/MOTESS Variable Star Catalog (Abstract)

    Roy A. Tucker, Eric R. Craine, Adam L. Kraus

  • Measuring Decay Timescales of Downflows in Solar Flare Footpoints: Testing the One-minute Theory (Abstract)

    Alexander K. Beltzer-Sweeney, Elizabeth Butler, Adam Kowalski, Gianna Cauzzi

  • High-precision Radial Velocity Measurements of Classical Cepheids (Abstract)

    Richard I. Anderson

• Errata
  • Erratum: Methods for O–C (Observed Minus Computed) Diagrams and for the Determination of Light Elements of Variable Stars with Linear and Second Order Polynomial Ephemerides

    Roy Andrew Axelsen