CONICET | Buscador de Institutos y Recursos Humanos

In this work we analyse Colour-Magnitude Diagrams (CMDs) of catalogued star clusters located in the Large Magellanic Cloud (LMC), from a $YJK_s$ photometric data set obtained by theVisible and Infrared Survey Telescope for Astronomy (VISTA) survey of the Magellanic Clouds system (VMC).}{We studied a total of 98 objects of small angular size, typically $sim$ 11.6 pcin diameter {f projected towards both uncrowded tile LMC 8_8 and crowded tile LMC 5_5}. They populate relatively crowded LMC fields with significant fluctuations in the stellar density, the luminosity function, and the colour distribution as well asuncrowded fields.This cluster sample is aimed at actually probing our performance in reaching theCMD features of clusters with different ages in crowded/uncrowded fields. %will be part of the cluster data base that the VMC survey will produce in order to%homogeneously study the overall cluster formation history throughout the Magellanic system.}{We applied a subtraction procedure to statistically clean the cluster CMDs from field star contamination.We then matched theoretical isochrones to the background-subtracted CMDs to determinethe ages and metallicities of the clusters. }{We estimated the ages of 65 clusters, which resulted to be in the age range 7.3 $<$ log($t$/yr) $<$ 9.55.We also classified as chance grouping of stars 19 previoulsy catalogued clusters, twopossible cluster-like asterisms, and one unresolved cluster.For other 8 objects, we could not find a clear star concentration in the $K_s$ images either, so we quoted them as cluster-like asterisms. Finally, we foundtwo previously catalogued single star clusters to be unresolved backgroundgalaxies (KMHK747, OGLE366), and one to be a triple cluster system (BSDL 2144).

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