Timon Althaus & Benedikt Götz
Using the TURMX Observatory in Spain, we observed the variable star LR Psc in the night from November 6th to November 7th, leveraging one of the few clear November nights. The constellation Pisces, to which this star belongs, was visible high up in the sky (above 30 degrees altitude) for about seven hours during that night. Despite some minor technical complications, we managed to observe it for six of those hours, enough to capture about four full periods. The data shows the distinctive shape of a pulsating variable star. With a measured period length of 90.370 ± 0.026 minutes, the star is one of the faster pulsating stars in its constellation. LR Pisces increases its amplitude by ca. 33% during one cycle. This leads to the classification as a high-amplitude Delta Scuti star.
The data was analyzed by fitting a Fourier series of finite order to the data. After some further consideration, a sixth-order series seemed the most accurate, while avoiding overfitting. We then had to correct for atmospheric variation, which caused the last maxima to drop in brightness, by adding a quadratic term. Finally, we obtained the the fit presented here.
