The Hubble Source Catalog (HSC) is designed to optimize science from the Hubble Space Telescope by
combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive (HLA)
into a single master catalog.
The Hubble Source Catalog (HSC) detailed search
displays an entry for each separate detection (or nondetection if nothing is found at that position)
using all the relevant Hubble observations for a given object
(i.e., different filters, detectors, separate visits).
The catalog currently contains over 100 million entries.