摘要：Context.This is the secondu-band extension of the WIde-field Nearby Galaxy-cluster Survey (WINGS) whereby 39 clusters were imaged with the ESO-VLT survey telescope. This follows the first part of the survey which was performed with several telescopes of the northern hemisphere in theUCousin–Bessel filter band covering 17 clusters.Aims.Theu-band data, in combination with those already collected by the WINGS survey, permit a detailed multi-wavelength investigation of the properties of the member galaxies from the cluster center out to the periphery.Methods.We usedSExtractorto derive the main properties of the galaxies in the observed fields and measure theu − Vcolors on circular apertures of increasing radius. The photometric accuracy of the magnitudes was calibrated with the standard stars and was tested by means of comparisons with theu-band data of the Sloan Digital Sky Survey (SDSS).Results.We present the catalogs of the photometric analysis performed bySExtractor. We also provide a brief analysis of theu − VversusVcolor–magnitude diagram of our clusters, the plots of the color as a function of the cluster-centric distance (for cluster members only), the mass–color relation and the correlation of the current star formation rate (SFR) with the absoluteVandumagnitudes for the galaxies in the observed fields.
