Upper panels: CMDs of the single quadrants without any selection. The lower row uses the point source selection as described in the text. Moreover, the Q2-CMD plots only objects with distances less than 2.75′ to the galaxy center. The GCS of NGC 7796 is very prominently seen, including its bimodal colour distribution. Note the sharp borders in colour. The vertical dashed lines mark the metallicities Z = 0.001 ([Fe/H] = −2.3) and Z = 0.04 ([Fe/H] = +0.3) for GCs of 11.2 Gyr according to Marigo et al. (2008). Some of the brighter objects of the (R = 22 mag corresponds to MR = −11.5) must be bright GCs as well.
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