Planck early results
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Table 1

Summary of the ESZ sample construction and validation steps.

Selection SZ Candidates Rejected

S/N ≥ 6 and good quality flag on SZ spectrum 201
Detected by one method only 11
Bad quality flag from visual inspection 1

ESZ sample 189
Known clusters 169

X-ray only 30
Optical only 5
NEDSimbad only 1
X-ray + Optical 128
X-ray + SZ 1
SZ + Optical 1
X-ray + Optical +SZ 3

New Planck clusters 20
XMM confirmed 11
AMI confirmed 1
Candidate new clusters 8

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