Planck Early Results XXVI: Detection with Planck and confirmation by XMM-Newton of PLCK G266.6-27.3, an exceptionally X-ray luminous and massive galaxy cluster at z~1
Creators: name: Planck Collaboration
name: Aghanim, N.
name: Arnaud, M.
name: Ashdown, M.
name: Atrio-Barandela, F.
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: Bhatia, R.
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: Cabella, P.
name: Cantalupo, C. M.
name: Cappellini, B.
name: Carvalho, P.
name: Catalano, A.
name: Cayón, L.
name: Chiang, L. -Y
name: Chiang, C.
name: Chon, G.
name: Christensen, P. R.
name: Churazov, E.
name: Clements, D. L.
name: Colafrancesco, S.
name: Colombi, S.
name: Crill, B. P.
name: Cuttaia, F.
name: Da Silva, A.
name: Dahle, H.
name: Danese, L.
name: D'Arcangelo, O.
name: Davis, R. J.
name: de Bernardis, P.
name: de Gasperis, G.
name: de Zotti, G.
name: Delabrouille, J.
name: Delouis, J. -M.
name: Démoclès, J.
name: Désert, F. -X.
name: Dickinson, C.
name: Diego, J. M.
name: Dole, H.
name: Donzelli, S.
name: Doré, O.
name: Douspis, M.
name: Dupac, X.
name: Efstathiou, G.
name: Enßlin, T. A.
name: Eriksen, H. K.
name: Finelli, F.
name: Flores-Cacho, I.
name: Forni, O.
name: Fosalba, P.
name: Frailis, M.
name: Franceschi, E.
name: Fromenteau, S.
name: Galeotta, S.
name: Ganga, K.
name: Génova-Santos, R. T.
name: Giard, M.
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: Heinämäki, P.
name: Hernández-Monteagudo, C.
name: Hildebrandt, S. R.
name: Hivon, E.
name: Hobson, M.
name: Hurier, G.
name: Jaffe, A. H.
name: Jones, W. C.
name: Juvela, M.
name: Keihänen, E.
name: Keskitalo, R.
name: Kisner, T. S.
name: Kneissl, R.
name: Kurki-Suonio, H.
name: Lagache, G.
name: Lähteenmäki, A.
name: Lamarre, J. -M.
name: Lasenby, A.
name: Lawrence, C. R.
name: Jeune, M. Le
name: Leach, S.
name: Leonardi, R.
name: Leroy, C.
name: Liddle, A.
name: Lilje, P. B.
name: López-Caniego, M.
name: Luzzi, G.
name: Macías-Pérez, J. F.
name: Maino, D.
name: Mandolesi, N.
name: Marleau, F.
name: Martínez-González, E.
name: Masi, S.
name: Matarrese, S.
name: Mazzotta, P.
name: Meinhold, P. R.
name: Melchiorri, A.
name: Melin, J. -B.
name: Mendes, L.
name: Mennella, A.
name: Miville-Deschênes, M. -A.
name: Moneti, A.
name: Montier, L.
name: Morgante, G.
name: Mortlock, D.
name: Munshi, D.
name: Naselsky, P.
name: Natoli, P.
name: Nevalainen, J.
name: Nørgaard-Nielsen, H. U.
name: Noviello, F.
name: Novikov, D.
name: Novikov, I.
name: O'Dwyer, I. J.
name: Osborne, S.
name: Paladini, R.
name: Pasian, F.
name: Patanchon, G.
name: Pearson, T. J.
name: Perdereau, O.
name: Perotto, L.
name: Perrotta, F.
name: Piacentini, F.
name: Pierpaoli, E.
name: Piffaretti, R.
name: Platania, P.
name: Pointecouteau, E.
name: Polenta, G.
name: Ponthieu, N.
name: Popa, L.
name: Poutanen, T.
name: Pratt, G. W.
name: Prézeau, G.
name: Prunet, S.
name: Puget, J. -L.
name: Rachen, J. P.
name: Rebolo, R.
name: Reinecke, M.
name: Renault, C.
name: Ricciardi, S.
name: Riller, T.
name: Ristorcelli, I.
name: Rocha, G.
name: Rubiño-Martín, J. A.
name: Saar, E.
name: Sandri, M.
name: Savini, G.
name: Schaefer, B. M.
name: Scott, D.
name: Smoot, G. F.
name: Starck, J. -L.
name: Sutton, D.
name: Sygnet, J. -F.
name: Tauber, J. A.
name: Terenzi, L.
name: Toffolatti, L.
name: Tomasi, M.
name: Tristram, M.
name: Türler, M.
name: Valenziano, L.
name: Vielva, P.
name: Villa, F.
name: Vittorio, N.
name: Wade, L. A.
name: Wandelt, B. D.
name: Weller, J.
name: White, S. D. M.
name: White, M.
name: Yvon, D.
name: Zacchei, A.
name: Zonca, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present first results on PLCK G266.6-27.3, a galaxy cluster candidate detected at a signal-to-noise ratio of 5 in the Planck All Sky survey. An XMM-Newton validation observation has allowed us to confirm that the candidate is a bona fide galaxy cluster. With these X-ray data we measure an accurate redshift, z = 0.94 +/- 0.02, and estimate the cluster mass to be M_500 = (7.8 +/- 0.8)e+14 solar masses. PLCK G266.6-27.3 is an exceptional system: its luminosity of L_X(0.5-2.0 keV)=(1.4 +/- 0.05)e+45 erg/s, equals that of the two most luminous known clusters in the z &gt; 0.5 universe, and it is one of the most massive clusters at z~1. Moreover, unlike the majority of high-redshift clusters, PLCK G266.6-27.3 appears to be highly relaxed. This observation confirms Planck's capability of detecting high-redshift, high-mass clusters, and opens the way to the systematic study of population evolution in the exponential tail of the mass function.
description: 6 pages, 3 figures; final version accepted for publication in A&amp;A ; minor changes in Sec.2.,3.2 and 4.1; Table 1: misprint on R500 error corrected; abundance value added