Planck Intermediate Results. IV. The XMM-Newton validation programme for new Planck galaxy clusters
Abstract
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>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 > 5 10^14 Msun at z > 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)
Keywords
Cite
@article{arxiv.1205.3376,
title = {Planck Intermediate Results. IV. The XMM-Newton validation programme for new Planck galaxy clusters},
author = {Planck Collaboration and P. A. R. Ade and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A. Balbi and A. J. Banday and R. B. Barreiro and J. G. Bartlett and E. Battaner and K. Benabed and A. Benoît and J. -P. Bernard and M. Bersanelli and I. Bikmaev and H. Böhringer and A. Bonaldi and J. R. Bond and S. Borgani and J. Borrill and F. R. Bouchet and M. L. Brown and C. Burigana and R. C. Butler and P. Cabella and P. Carvalho and A. Catalano and L. Cayón and A. Chamballu and R. -R. Chary and L. -Y Chiang and G. Chon and P. R. Christensen and D. L. Clements and S. Colafrancesco and S. Colombi and A. Coulais and B. P. Crill and F. Cuttaia and A. Da Silva and H. Dahle and R. J. Davis and P. de Bernardis and G. de Gasperis and G. de Zotti and J. Delabrouille and J. Démoclès and F. -X. Désert and J. M. Diego and K. Dolag and H. Dole and S. Donzelli and O. Doré and M. Douspis and X. Dupac and T. A. Enßlin and H. K. Eriksen and F. Finelli and I. Flores-Cacho and O. Forni and M. Frailis and E. Franceschi and M. Frommert and S. Galeotta and K. Ganga and R. T. Génova-Santos and Y. Giraud-Héraud and J. González-Nuevo and R. González-Riestra and K. M. Górski and A. Gregorio and A. Gruppuso and F. K. Hansen and D. Harrison and A. Hempel and S. Henrot-Versillé and C. Hernández-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and M. Hobson and W. A. Holmes and A. Hornstrup and W. Hovest and K. M. Huffenberger and G. Hurier and A. H. Jaffe and T. Jagemann and W. C. Jones and M. Juvela and R. Kneissl and J. Knoche and L. Knox and M. Kunz and H. Kurki-Suonio and G. Lagache and J. -M. Lamarre and A. Lasenby and C. R. Lawrence and M. Le Jeune and S. Leach and R. Leonardi and A. Liddle and P. B. Lilje and M. Linden-Vørnle and M. López-Caniego and G. Luzzi and J. F. Macías-Pérez and D. Maino and N. Mandolesi and R. Mann and M. Maris and F. Marleau and D. J. Marshall and E. Martínez-González and S. Masi and M. Massardi and S. Matarrese and P. Mazzotta and S. Mei and P. R. Meinhold and A. Melchiorri and J. -B. Melin and L. Mendes and A. Mennella and S. Mitra and M. -A. Miville-Deschênes and A. Moneti and G. Morgante and D. Mortlock and D. Munshi and P. Naselsky and F. Nati and P. Natoli and H. U. Nørgaard-Nielsen and F. Noviello and S. Osborne and F. Pajot and D. Paoletti and O. Perdereau and F. Perrotta and F. Piacentini and M. Piat and E. Pierpaoli and R. Piffaretti and S. Plaszczynski and P. Platania and E. Pointecouteau and G. Polenta and L. Popa and T. Poutanen and G. W. Pratt and S. Prunet and J. -L. Puget and M. Reinecke and M. Remazeilles and C. Renault and S. Ricciardi and G. Rocha and C. Rosset and M. Rossetti and J. A. Rubiño-Martín and B. Rusholme and M. Sandri and G. Savini and D. Scott and G. F. Smoot and A. Stanford and F. Stivoli and R. Sudiwala and R. Sunyaev and D. Sutton and A. -S. Suur-Uski and J. -F. Sygnet and J. A. Tauber and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and L. Valenziano and B. Van Tent and P. Vielva and F. Villa and N. Vittorio and L. A. Wade and B. D. Wandelt and N. Welikala and J. Weller and S. D. M. White and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1205.3376},
year = {2016}
}
Comments
accepted by A&A