Upper four rows a–d: Hubble Space Telescope ACS cutouts of the sources selected as GCs candidates and falling in the GHOSTS survey footprints (F814W-band imaging data are shown). Given the mottled appearance, we consider all sources as star clusters in the galaxy. For reference, the panels in row e) show the other two selected sources in the GHOSTS footprints, which are obvious background galaxies, and two stellar sources. The sources in the row f) are the visually identified GC candidates (see text).
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