Haffner 9 CT1 photometry

In order to provide with accurate estimates, we present high-quality Washington CT_1_ and Johnson BVI photometry of the cluster field. We put particular care in statistically cleaning the colour-magnitude diagrams (CMDs) from field star contamination, which was found a common source in previous works for the discordant fundamental parameter estimates.

The resulting cluster CMD fiducial features were confirmed from a proper motion membership analysis. Haffner 9 is a moderately young object (age~350Myr), placed in the Perseus arm - at a heliocentric distance of ~3.2kpc - , with a lower limit for its present mass of ~160M_{sun}_ and of nearly metal solar content. The combination of the cluster structural and fundamental parameters suggest that it is in an advanced stage of internal dynamical evolution, possibly in the phase typical of those with mass segregation in their core regions.