VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'The elusive distance gradient in the ultrafaint dwarf galaxy Hercules: a combined Hubble Space Telescope and Gaia view.' (bibcode: 2020ApJ...902..106M)
Mutlu-Pakdil, B. (Creator), Sand, D. J. (Creator), Crnojević, D. (Contributor), Olszewski, E. W. (Creator), Zaritsky, D. (Creator), Strader, J. (Creator), Collins, M. L. (Creator), Seth, A. C. (Creator), Willman, B. (Creator) (2022). HST obs. & Gaia data of Hercules dwarf gal. Centre de Donnees Strasbourg (CDS). 10.26093/cds/vizier.19020106