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Table 2:

Observation statistics of the candidate samples.
  RR 143 RR 210 RR 216 RR 242
Candidate sample 171 190 178 118
Observed 106 (62%) 55 (29%) 24 (13%) 73 (62%)
Measured z total 84 (79%) 52 (95%) 22 (92%) 55 (75%)
Measured z xcsao 69 50 22 45
Measured z splot 15 2 - 10
Members 2 (2%) 2 (4%) 3 (14%) 10 (18%)
Members corr. 4.4 4.9 15 15.4
Total number of spectroscopically observed objects: 258
Total number of measured redshifts: 213 (83%)
Row 1: number of galaxies in the candidate sample; row 2: number of galaxies observed with VIMOS, in brackets the percentage of spectroscopically observed galaxies out of the candidate sample; row 3: number of galaxies for which a redshift could be measured, in brackets the percentage of galaxies with measured redshift out of all spectroscopically observed galaxies; row 4: number of redshifts obtained by cross-correlation with xcsao; row 5: number of redshifts obtained by fitting single lines with splot; row 6: number of newly discovered members, in brackets the percentage of newly found member galaxies out of all galaxies with measured redshifts; row 7: completeness corrected number of members (see Sect. 3).

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