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Context. This is the third paper of a series devoted to the WIde-field NearbyGalaxy-cluster Survey (WINGS).WINGS is a long term project aimed at gatheringwide-field, multiband imaging and spectroscopy of galaxies in a complete sampleof 77 X-ray selected nearby clusters (0.04<z<0.07) located far from thegalactic plane (b>20deg). The main goal of this project is to establish a localreference sample for evolutionary studies of galaxies and galaxy clusters.Aims. This paper presents the near-infrared (J,K) photometric catalogs of 28clusters of the WINGS sample and describes the procedures followed to constructthem. Methods. The raw data has been reduced at CASU and special care has beendevoted to the final coadding, drizzling technique, astrometric solution andmagnitude calibration for the WFCAM pipeline processed data. We haveconstructed the photometric catalogs based on the final calibrated coaddedmosaics (0.79 deg2) in J (19 clusters) and K (27 clusters) bands. A customizedinteractive pipeline has been used to clean the catalogs and to make mockimages for photometric errors and completeness estimates. Results. We providedeep near-infrared photometric catalogs (90% complete in detection rate attotal magnitudes J =20.5, K =19.4, and in classification rate at J = 19.5 and K= 18.5), giving positions, geometrical parameters, total and aperturemagnitudes for all detected sources. For each field we classify the detectedsources as stars, galaxies and objects of "unknown" nature.

WINGS: a WIde-field nearby Galaxy-cluster survey III. Deep near-infrared photometry of 28 nearby clusters