Lamassa, S. M.S. M.Lamassa0000-0001-5544-0749Urry, C. M.C. M.Urry0000-0003-3451-9970Cappelluti, N.N.CappellutiBohringer, H.H.BohringerCOMASTRI, AndreaAndreaCOMASTRIGlikman, E.E.GlikmanRichards, G.G.RichardsAnanna, T.T.AnannaBrusa, M.M.BrusaCardamone, C.C.CardamoneChon, G.G.ChonCivano, F.F.CivanoFarrah, D.D.FarrahGilfanov, M.M.GilfanovGreen, P.P.GreenKomossa, S.S.KomossaLira, P.P.LiraMakler, M.M.MaklerMARCHESI, STEFANOSTEFANOMARCHESIPecoraro, R.R.PecoraroRanalli, P.P.RanalliSalvato, M.M.SalvatoSchawinski, K.K.SchawinskiStern, D.D.SternTreister, E.E.TreisterViero, M.M.Viero2020-05-202020-05-202016http://hdl.handle.net/20.500.12386/24987XMM-Newton and Chandra X-ray sources matched to the SDSS, WISE, UKIDSS, VHS, and GALEX catalogs using the maximum likelihood estimator (MLE). X-ray sources are matched to FIRST and Herschel sources using a nearest neighbor matching. Spectroscopic redshifts obtained from dedicated ground-based follow-up are also published in this catalog. The archival Chandra and archival and AO10 XMM-Newton catalogs supersede those from the previous catalog release in 2013. <P />(3 data files). <P />enDatabasehttp://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/ApJ/817/1722016yCat..18170172LFIS/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