Title: Discovering Cepheid and RR Lyrae Stars: PanSTARRS Science Archive @ STScI and Robotically Controlled Telescopes Abstract: Cepheid and RR Lyrae stars are an integral part of the cosmic distance ladder and are also useful for studying galactic structure and stellar ages. This project aims to greatly expand the number of known Cepheid and RR Lyrae stars in our galaxy through use of the PanSTARRS-1 3pi catalog and robotically controlled telescopes. Candidate targets are selected from the cataloged stars based on color and variability index. Then the candidates are fully vetted using robotic telescopes: the RCT 1.3 meter (Arizona) and RATIR 1.5 meter (Mexico). Here I present my work done this summer to develop a full, semi-automated prescription from candidate selection, to targeted follow-up photometry, to cataloging and classification. The goal, through continued observation and analysis into the fall, is to identify at least 10,000 new variables, hundreds of which will be new Cepheid and RR Lyrae stars. Powerpoint is attached. Thank you!