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Fig. 3


a) IRAC color–magnitude diagram with the sources detected in the first two IRAC bands. Five sources which are also observed with X-shooter are labeled; plot symbols are the same as in Fig. 2. b) IRAC color–color diagram with the sources within the SOFI field of view detected in all four IRAC bands. The dotted rectangle indicates the location of the class II sources (Megeath et al. 2004).

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