Volume 51 number 2 — 2023

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Articles in This Issue

• Editorial

• Editorial: Who are JAAVSO’s Authors?

  Nancy D. Morrison

• Variable Star Research

• Tracking Spectroscopically Determined H-alpha and H-beta Indices for Two Emission-Line Objects

  Tyler B. Harding, Eric G. Hintz

• Photometry and Transit Modeling of Exoplanet XO-1b

  Simon Sikora, Timothy Banks

• Investigation of the Variable Star CH Camelopardalis in the Planetary Nebula NGC 1501

  Trent Mosher, Aisha Randhawa, Carolina Noviello, Adela Horsting, Kalée Tock

• No Longer Eclipsing—The Strange Case of RS Crateris

  Stephen P. Cook

• Markov Chain Monte Carlo Optimization applied to Dyson’s Visual Double Stars

  Isabella Soh Xiao Si, Michael D. Rhodes, Edwin Budding, Timothy Banks

• Ninety-Seven New Variable Stars in ω Centauri

  Douglas Walker, Michael Albrow

• CCD Photometry, Light Curve Deconvolution, Period Analysis, and Evolutionary Status of the HADS Variable V1116 Herculis

  W. Allen Gilchrist, Jr., Kevin B. Alton

• Spectroscopic and Photometric Study of the Asymptotic Giant Branch Star T Cephei

  David Boyd

• X-ray Luminosity Versus Orbital Period of AM CVn Systems

  Teja Begari, Thomas J. Maccarone

• Variability Properties of Red Giants and Supergiants in the AAVSO Binocular Observing Program

  John R. Percy, Sandra Zhitkova

• The “Long Secondary Period (LSP) Variables”: Overview and Some Analysis

  John R. Percy, Mayank H. Shenoy

• Instruments, Methods, and Techniques

• An Orbital Solution for WASP-12 b: Updated Ephemeris and Evidence for Decay Leveraging Citizen Science Data

  Avinash S. Nediyedath, Martin J. Fowler, Anthony Norris, Shivaraj R. Maidur, Kyle A. Pearson, Scott Dixon, Pablo Lewin, Andre O. Kovacs, Alessandro Odasso, Ken Davis, Michael Primm, Prithwis Das, Bryan E. Martin, Douglas Lalla

• Variable Star Data

• Recent Minima of 229 Eclipsing Binary Stars

  Gerard Samolyk