Notes. Columns 1–2: cluster MCXC Name and input catalogue. Column 3: MCXC redshift value from input catalogue z_cat. Columns 4-6: revised redshift, z, type and reference. Columns 7–8: difference, ∆(z) = (z − z_cat), between the two values, in percentage terms ∆(z)/z_cat or divided by (1 + z_cat). Column 9: reason for the redshift revision: discrepancy with NED (NED) or SIMBAD (SB) preferred value, or discrepancy with both (NEDSB); discrepancy with the spectroscopic redshift of the associated cluster from optical catalogues (Ocat) based on large galaxy surveys (principally SDSS). Column 10: matching cluster with z_spec in the catalogues of Wen & Han (2015, WH), Rykoff et al. (2016, RM), Wen et al. (2018, WHY), Abdullah et al. (2020, GalWCat), Koulouridis et al. (2021, XCLASS), and Xu et al. (2022, RXGCC). Column 11: rationale for change: (1) original value based on one or two likely foreground galaxies; (2) more precise value based on a larger number of galaxies, or more robust value; (3) Complex case (e.g. multi-component systems). Values with large differences, as well as cases of line-of-sight structures, are indicated in bold and discussed in the Appendix.

References. (1) De Propris et al. (2002); (2) Wen & Han (2015); (3) Cruddace et al. (2002); (4) Mulchaey et al. (2006); (5) Wen et al. (2018); (6) Abdullah et al. (2020); (7) Quintana & Ramirez (1995); (8) Orlowski-Scherer et al. (2021); (9) Smith et al. (2004); (10) Rykoff et al. (2016); (11) Huang et al. (2009); (12) Rines et al. (2013); (13) Hamer et al. (2016); (14) von der Linden et al. (2007); (15) Ebeling et al. (2010); (16) Koulouridis et al. (2021); (17) Wegner et al. (1999); (18) Monteiro-Oliveira et al. (2022); (19) Xu et al. (2022); (20) Song et al. (2012); (21) Caretta et al. (2002).