Planck Early Results VIII: The all-sky Early Sunyaev-Zeldovich cluster sample
Planck Collaboration: P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown,, J. Aumont, C. Baccigalupi, A. Balbi, A. J. Banday, R. B. Barreiro, M., Bartelmann, J. G. Bartlett, E. Battaner, R. Battye, K. Benabed, A. Beno\^it,, J.-P. Bernard, M. Bersanelli, R. Bhatia, J. J. Bock

TL;DR
This paper presents the first all-sky sample of galaxy clusters detected via the Sunyaev-Zeldovich effect by the Planck satellite, including known and new clusters with high reliability and a wide range of masses and redshifts.
Contribution
It provides the first all-sky SZ-selected galaxy cluster sample with extensive validation, including new cluster candidates and confirmation through follow-up observations.
Findings
189 high-confidence SZ cluster candidates identified
80% of known ESZ clusters have measured SZ signals
12 new clusters confirmed, mostly with disturbed morphologies
Abstract
We present the first all-sky sample of galaxy clusters detected blindly by the Planck satellite through the Sunyaev-Zeldovich (SZ) effect from its six highest frequencies. This early SZ (ESZ) sample is comprised of 189 candidates, which have a high signal-to-noise ratio ranging from 6 to 29. Its high reliability (purity above 95%) is further ensured by an extensive validation process based on Planck internal quality assessments and by external cross-identification and follow-up observations. Planck provides the first measured SZ signal for about 80% of the 169 previously-known ESZ clusters. Planck furthermore releases 30 new cluster candidates, amongst which 20 meet the ESZ signal-to-noise selection criterion. At the submission date, twelve of the 20 ESZ candidates were confirmed as new clusters, with eleven confirmed using XMM-Newton snapshot observations, most of them with disturbed…
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