Optical Investigation of Cataclysmic Variables HP Lib, NY Lup, and NR TrA using Remote Observing

I report on a photometric analysis of three cataclysmic variables (HP Lib, NY Lup, and NR TrA) that we observed using the 0.6m-telescope in El Sauce Observatory in Chile and the 0.43m-telescope in Siding Spring Observatory in Australia from June 2020 to March 2021. We used 45s exposures and a 2 to 3 hour-long span. Our goal is to produce a light curve for each target star in order to observe the variation over the course of the observing period. Analyzing the light curve allows us to determine properties of the binary system, such as variations in the material flow rate between the two stars. For our analysis, we used the image processing software AstroImageJ to align our image ensembles and we chose from several field stars for our comparison and check stars for our targets. After performing a photometric analysis of our data with the same software, we observed a substantial variation in the light of each target for each night. Our data will be contributed to the data bases of the Center for Backyard Astrophysics, an amateur professional collaboration, and of the American Association of Variable Star Observers.