Deep GMOS-South image

Deep GMOS-South image in the i’ band of the central part of the Hydra Cluster. The field is 5.5 arcminutes across. NGC 3331 is the large massive elliptical in the center, while NGC 3309, another large elliptical, is to the upper right. The circles mark the location of ultra-compact dwarf candidates. The shadow (in white) of the GMOS guide probe is seen at the bottom.