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We have used a combination of high-resolution Hubble Space Telescope WFPC2and wide-field ground-based observations in ultraviolet and optical bands tostudy the blue straggler star (BSS) population of the outer-halo globularcluster NGC 6229, over its entire radial extent. A total of 64 bright BSS (withm255 6 21.30, corresponding to m555 6 20.75) has been identified. The BSSprojected radial distribution is found to be bimodal, with a high central peak,a well defined minimum at intermediate radii (r \sim 40"), and an upturn in theoutskirts. From detailed star counts even in the very inner region, we computethe centre of gravity of the cluster and the most accurate and extended radialdensity profile ever published for this system. The profile is reasonably wellreproduced by a standard King model with an extended core (rc \simeq 9.5") anda modest value of the concentration parameter (c \simeq 1.49). However, adeviation from the model is noted in the most external region of the cluster(at r > 250" from the centre). This feature needs to be further investigated inorder to assess the possible presence of a tidal tail in this cluster.

The BSS population in NGC 6229