JAAVSO Volume 49 Number 1, 2021 is published

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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 49, Number 1, 2021

Articles in This Issue

• Editorial

  • Conference Proceedings of the AAVSO

    Nancy D. Morrison

• Variable Star Research

  • Low Resolution Spectroscopy of Miras 2—R Octantis

    Bill Rea, John C. Martin

  • The Confirmation of Three Faint Variable Stars and the Observation of Eleven Others in the Vicinity of Kepler-8b by the Lookout Observatory

    Neil Thomas, Margaret Paczkowski

  • An Update on the Periods and Period Changes of the Blazhko RR Lyrae Star XZ Cygni

    Dylan Kaneshiro, Horace A. Smith, Gerard Samolyk

  • Four New Variable Stars in the Field of KELT-16

    Daniel J. Brossard, Ronald H. Kaitchuck

  • A Spectroscopic Study of the Variable Star T Centauri Over a 91-day Cycle, and the Effects of Titanium Oxide on Its Atmosphere

    Julian F. West, Benedict Pace

  • RU Cam: The Reluctant Cepheid Revisited

    John R. Percy

  • Light Curve Analysis of 185 YSOs: New Periods Discovered for 9 Stars

    Joshua R. Hamilton

  • Refining Ephemeris and Estimating Period Change Rate for V965 Cephei

    Maksym Pyatnytskyy

  • V350 Muscae: RR Lyrae Star Distance Estimate and RRab Reclassification

    Demetris Nicolaides, Destiny L. King, Sandra Moreno Cristobal

  • Period Determination and Classification Analysis of 25 Pulsating Red Giants

    Anshita Saini, Nicholas Walker

  • The Correlation between Hα and HeI 6678 Emission Activity in the Be Star γ Cassiopeiae from 1995 to 2021

    Ernst Pollmann

  • A Historical Perspective on the Diversity of Explanations for New Classes of Transient and Variable Stars

    Thomas J. Maccarone

• Education and Outreach

  • Transits, Spots, and Eclipses: The Sun’s Unique Role in Outreach

    Kristine Larsen

• Variable Star Data

  • The Photometric Period of V1391 Cassiopeiae (Nova Cas 2020)

    Richard E. Schmidt

  • The Photometric Period of V1112 Persei (Nova Per 2020)

    Richard E. Schmidt

  • Recent Maxima of 79 Short Period Pulsating Stars

    Gerard Samolyk

  • Times of Minima for Eclipsing Binaries 2017–2020 from Stellar Skies Observatories and 2004–2009 SuperWasp Data Mining

    Edward O. Wiley, E. Whit Ludington

  • Recent Minima of 225 Eclipsing Binary Stars

    Gerard Samolyk

• Abstracts

  • Types of Period Changes of W Virginis Stars (Abstract)

    Pradip Karmakar, Horace A. Smith, Wayne Osborn

  • Search for Variability in 30 Bright Metallic-line A Stars Observed by the TESS Spacecraft (Abstract)

    Joyce A. Guzik

  • Simultaneous Photometry on VSX Variables and TESS Exoplanet Candidates (Abstract)

    Madelyn Madsen

  • The Quick and the Deadtime (Abstract)

    Gregory Sivakoff

  • Characterizing the O’Connell Effect in Kepler Eclipsing Binaries (Abstract)

    Matthew Knote

  • Disk Instabilities Caused the 2018 Outburst of AG Draconis (Abstract)

    Helena M. Richie

  • Using Bespoke 18-inch Newtonian and R = 3000 Spectrometer for High-Precision Observations (Abstract)

    John Menke

  • Morning Star: The Search for and Discovery of the Stars of Bethlehem According to the Gospel of Matthew (Abstract)

    Rev. Kenneth Beckmann

  • Automating a Small Urban College Observatory (Abstract)

    Donald Smith, Deshawn Reid

  • Researching Eclipsing Binaries “Down Under”: Illustrating the Methods and Results of Variable Stars South (Abstract)

    Thomas J. Richards

  • Measuring the Masses of White Dwarfs with X-rays: A NuSTAR Legacy Survey (Abstract)

    Aarran Shaw

  • Building Connection through Community-Based Astronomy (Abstract)

    Todd Duncan, Erika Dunning

  • New Observations of the SX Phe Star XX Cygni (Abstract)

    Richard Berry, Nolan Sottoway, Sol McClain

  • Discoveries of Variable Stars by Amateur Astronomers Using Data Mining on the Example of Eclipsing Binary Romanov V20 (Abstract)

    Filipp Romanov

  • Star “Crawling” with Astronomical Binoculars (Abstract)

    William Wink

  • GW Lib and V386 Ser: CVs Containing Accreting, Pulsating White Dwarfs (Abstract)

    Paula Szkody

  • The Blazar BL Lacertae: 2018-2020 V-, R-, and I-Band CCD Photometry (Abstract)

    Manny Rosales, Christina Singh, Wyatt Carbonell, Leslie F. Brown, Gary Walker

  • Differential Photometry of Eclipsing Binary System V798 Her in Globular Cluster NGC 6341 (Abstract)

    Khola Anees, Shaukat Naaman Goderya, Fazeel Mahmood Khan

  • Establishing a New ToM (Time of Minimum) for the Primary Eclipse of the Binary System WZ Ophiuchi (Abstract)

    Mike Miller

  • Identification of Bimodal Period and Long Secondary Period Carbon Red Giants Misclassified as “Miscellaneous” in VSX (Abstract)

    Kristine Larsen

  • Using High Resolution Spectroscopy to Measure Cepheid Pulsation (Abstract)

    Kevin Gurney