Fig. 3

Upper panel: CMD of confirmed globular clusters in NGC 1316 in the Washington system, marked by open circles. The photometric data are taken from Paper I. Twenty objects from Goudfrooij et al. (2001b) are denoted by crosses. The dashed vertical line denotes the galaxy colour. The dotted vertical marks the colour limit for old, metal-poor globular clusters. We also note the excess of clusters blueward of this limit which corresponds to ages of about 1 Gyr, if solar metallicity is assumed. Also note the object at C − R = 0.4. Lower panel: corresponding colour histograms (solid histogram, only for our sample). The dotted histogram (scaled down for a convenient display) is the more complete photometric sample from Paper I. The two well-defined peaks, already indicated in Goudfrooij et al. (2001a) probably mark two epochs of high star formation rates.
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