Date of Award
RR Lyrae stars are pulsating variables that have been used in determining the cosmic distance scale. We have defined under-observed RR Lyrae variable stars to be those RR Lyrae stars that are missing some information in the literature, such as the period, or that have incompatible data in the literature, such as two different light curves. GM Orionis is an RR Lyrae variable star with two inconsistent light curves existent in the literature. I have performed CCD photometry on my own observations of GM Orionis, and have put the photometric measurements on a standard scale in order to compare my measurements to those in the literature. We have observed GM Orionis becoming brighter on average over time, while the amplitude of variability has remained constant.
Welling, Christine A., "Photometry of Under-Observed RR Lyrae Variable Stars: GM Orionis" (2012). Dickinson College Honors Theses. Paper 51.