Girardi, M.M.Girardi0000-0002-4800-0806Boschin, W.W.Boschin0000-0003-4117-8617GASTALDELLO, FABIOFABIOGASTALDELLO0000-0003-1997-0771Giovannini, GabrieleGabrieleGiovannini0000-0003-3644-3084GOVONI, FEDERICAFEDERICAGOVONI0000-0003-4916-6362MURGIA, MATTEOMATTEOMURGIA0000-0002-9112-0184Barrena, R.R.BarrenaETTORI, STEFANOSTEFANOETTORITrasatti, M.M.TrasattiVACCA, VALENTINAVALENTINAVACCA2020-06-262020-06-262016http://hdl.handle.net/20.500.12386/26224Multi-object spectroscopic observations of A523 were carried out at the TNG in 2012 December and 2014 January. We used the instrument DOLORES in MOS mode with the LR-B Grism. In summary, we observed six MOS masks for a total of 210 slits. The total exposure time was 3600s for three masks, 5400s for two masks and 7200s for the last one. <P />Our photometric observations were carried out with the Wide Field Camera (WFC), mounted at the prime focus of the 2.5-m INT telescope. We observed A523 in g, r and i Sloan-Gunn filters in photometric conditions and a seeing of ~1.4arcsec. (1 data file).enDatabasehttp://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/MNRAS/456/28292016yCat..74562829GFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation