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Table 1

Overview of the data quality of the samples.

Low-z 400SD SPT

Number of clusters 78 36 15
Redshift range 0.05–0.31 0.35–0.89 0.29–1.08
Mean net photon counts 96997 1203 1735
Mean S/B 6.6 3.7 3.2

P3/P0 >0 68 22 11
Upper limits 14 21 8
SP3 > 1 55 6 3
SP3 > 3 28 2 0
Mean SP3 2.6 0.5 0.4
Median SP3 2.0 0.2 0.1

w > 0 78 35 15
Upper limits 1 3 1
Sw > 1 77 28 13
Sw > 3 74 19 5
Mean Sw 23.0 3.8 3.4
Median Sw 17.0 3.8 2.6

Notes. Mean net photon counts and mean S/B calculated within r500 of the reduced and point source corrected X-ray image. S/B gives the ratio of net photon counts (signal) to background photon counts. P3/P0 and w are computed in the r500 aperture. P3/P0 > 0 and w > 0 include all clusters with positive corrected substructure values, including positive non-significant detections. For clusters with non-significant results, we quote upper limits, which are taken as the sum of the non-significant result (or zero for a neg. corrected P3/P0 or w) and the 1-σ error (for details see Sect. 3). The significance S is computed as the ratio of P3/P0 or w with respect to its error. This table is discussed in more detail in Sect. 4.

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