Planck Intermediate Results. IV. The XMM-Newton validation programme for new Planck galaxy clusters
Creators: name: Planck Collaboration
name: Ade, P. A. R.
name: Aghanim, N.
name: Arnaud, M.
name: Ashdown, M.
name: Aumont, J.
name: Baccigalupi, C.
name: Balbi, A.
name: Banday, A. J.
name: Barreiro, R. B.
name: Bartlett, J. G.
name: Battaner, E.
name: Benabed, K.
name: Benoît, A.
name: Bernard, J. -P.
name: Bersanelli, M.
name: Bikmaev, I.
name: Böhringer, H.
name: Bonaldi, A.
name: Bond, J. R.
name: Borgani, S.
name: Borrill, J.
name: Bouchet, F. R.
name: Brown, M. L.
name: Burigana, C.
name: Butler, R. C.
name: Cabella, P.
name: Carvalho, P.
name: Catalano, A.
name: Cayón, L.
name: Chamballu, A.
name: Chary, R. -R.
name: Chiang, L. -Y
name: Chon, G.
name: Christensen, P. R.
name: Clements, D. L.
name: Colafrancesco, S.
name: Colombi, S.
name: Coulais, A.
name: Crill, B. P.
name: Cuttaia, F.
name: Da Silva, A.
name: Dahle, H.
name: Davis, R. J.
name: de Bernardis, P.
name: de Gasperis, G.
name: de Zotti, G.
name: Delabrouille, J.
name: Démoclès, J.
name: Désert, F. -X.
name: Diego, J. M.
name: Dolag, K.
name: Dole, H.
name: Donzelli, S.
name: Doré, O.
name: Douspis, M.
name: Dupac, X.
name: Enßlin, T. A.
name: Eriksen, H. K.
name: Finelli, F.
name: Flores-Cacho, I.
name: Forni, O.
name: Frailis, M.
name: Franceschi, E.
name: Frommert, M.
name: Galeotta, S.
name: Ganga, K.
name: Génova-Santos, R. T.
name: Giraud-Héraud, Y.
name: González-Nuevo, J.
name: González-Riestra, R.
name: Górski, K. M.
name: Gregorio, A.
name: Gruppuso, A.
name: Hansen, F. K.
name: Harrison, D.
name: Hempel, A.
name: Henrot-Versillé, S.
name: Hernández-Monteagudo, C.
name: Herranz, D.
name: Hildebrandt, S. R.
name: Hivon, E.
name: Hobson, M.
name: Holmes, W. A.
name: Hornstrup, A.
name: Hovest, W.
name: Huffenberger, K. M.
name: Hurier, G.
name: Jaffe, A. H.
name: Jagemann, T.
name: Jones, W. C.
name: Juvela, M.
name: Kneissl, R.
name: Knoche, J.
name: Knox, L.
name: Kunz, M.
name: Kurki-Suonio, H.
name: Lagache, G.
name: Lamarre, J. -M.
name: Lasenby, A.
name: Lawrence, C. R.
name: Jeune, M. Le
name: Leach, S.
name: Leonardi, R.
name: Liddle, A.
name: Lilje, P. B.
name: Linden-Vørnle, M.
name: López-Caniego, M.
name: Luzzi, G.
name: Macías-Pérez, J. F.
name: Maino, D.
name: Mandolesi, N.
name: Mann, R.
name: Maris, M.
name: Marleau, F.
name: Marshall, D. J.
name: Martínez-González, E.
name: Masi, S.
name: Massardi, M.
name: Matarrese, S.
name: Mazzotta, P.
name: Mei, S.
name: Meinhold, P. R.
name: Melchiorri, A.
name: Melin, J. -B.
name: Mendes, L.
name: Mennella, A.
name: Mitra, S.
name: Miville-Deschênes, M. -A.
name: Moneti, A.
name: Morgante, G.
name: Mortlock, D.
name: Munshi, D.
name: Naselsky, P.
name: Nati, F.
name: Natoli, P.
name: Nørgaard-Nielsen, H. U.
name: Noviello, F.
name: Osborne, S.
name: Pajot, F.
name: Paoletti, D.
name: Perdereau, O.
name: Perrotta, F.
name: Piacentini, F.
name: Piat, M.
name: Pierpaoli, E.
name: Piffaretti, R.
name: Plaszczynski, S.
name: Platania, P.
name: Pointecouteau, E.
name: Polenta, G.
name: Popa, L.
name: Poutanen, T.
name: Pratt, G. W.
name: Prunet, S.
name: Puget, J. -L.
name: Reinecke, M.
name: Remazeilles, M.
name: Renault, C.
name: Ricciardi, S.
name: Rocha, G.
name: Rosset, C.
name: Rossetti, M.
name: Rubiño-Martín, J. A.
name: Rusholme, B.
name: Sandri, M.
name: Savini, G.
name: Scott, D.
name: Smoot, G. F.
name: Stanford, A.
name: Stivoli, F.
name: Sudiwala, R.
name: Sunyaev, R.
name: Sutton, D.
name: Suur-Uski, A. -S.
name: Sygnet, J. -F.
name: Tauber, J. A.
name: Terenzi, L.
name: Toffolatti, L.
name: Tomasi, M.
name: Tristram, M.
name: Valenziano, L.
name: Van Tent, B.
name: Vielva, P.
name: Villa, F.
name: Vittorio, N.
name: Wade, L. A.
name: Wandelt, B. D.
name: Welikala, N.
name: Weller, J.
name: White, S. D. M.
name: Yvon, D.
name: Zacchei, A.
name: Zonca, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the final results from the XMM-Newton validation follow-up of new Planck galaxy cluster candidates. We observed 15 new candidates, detected with signal-to-noise ratios between 4.0 and 6.1 in the 15.5-month nominal Planck survey. The candidates were selected using ancillary data flags derived from the ROSAT All Sky Survey (RASS) and Digitized Sky Survey all-sky maps, with the aim of pushing into the low SZ flux, high-z regime and testing RASS flags as indicators of candidate reliability. 14 new clusters were detected by XMM, including 2 double systems. Redshifts lie in the range 0.2 to 0.9, with 6 clusters at z&gt;0.5. Estimated M500 range from 2.5 10^14 to 8 10^14 Msun. We discuss our results in the context of the full XMM validation programme, in which 51 new clusters have been detected. This includes 4 double and 2 triple systems, some of which are chance projections on the sky of clusters at different z. We find that association with a RASS-BSC source is a robust indicator of the reliability of a candidate, whereas association with a FSC source does not guarantee that the SZ candidate is a bona fide cluster. Nevertheless, most Planck clusters appear in RASS maps, with a significance greater than 2 sigma being a good indication that the candidate is a real cluster. The full sample gives a Planck sensitivity threshold of Y500 ~ 4 10^-4 arcmin^2, with indication for Malmquist bias in the YX-Y500 relation below this level. The corresponding mass threshold depends on z. Systems with M500 &gt; 5 10^14 Msun at z &gt; 0.5 are easily detectable with Planck. The newly-detected clusters follow the YX-Y500 relation derived from X-ray selected samples. Compared to X-ray selected clusters, the new SZ clusters have a lower X-ray luminosity on average for their mass. There is no indication of departure from standard self-similar evolution in the X-ray versus SZ scaling properties. (abridged)
description: accepted by A&amp;A