Search for Local Group Clusters: M33 Survey Data

We construct a catalog of star clusters in the Triangulum Galaxy (M33). The catalog is the result of the Local Group Cluster Search (LGCS) citizen science project through Zooniverse, where users classify images from the Hubble Space Telescope (HST). We base our star cluster catalog on the fraction of the 60 users that viewed each image that identified each object as a star cluster. Preliminary results show more than 1800 star clusters. We derive the completeness of the catalog from analyzing 1700 synthetic clusters to determine detection limits, as well as comparing our results to previous catalogs in the literature. By weighting Zooniverse users based on how many objects they classified as star clusters that were in fact star clusters, we hope to improve the completeness of the catalog. The catalog expands upon previous ground based catalogs extending the catalog by approximately 1300 clusters, providing base data for further research into star formation in M33.