Radio data for CRS.
We explain the calculation of scatter given in Table 3, which is based on the weighted sample variance in the log-log plane (Arnaud et al. 2005; Mittal et al. 2011): where , . Here, N is the sample size, c is the normalisation, m is the slope and the deltas represent the errors on the quantities. The statistical scatter, σstat, is estimated by calculating the root-mean-square of σi. The intrinsic scatter is given as the difference between the raw and the statistical scatters in quadrature. We simply replace M500 in place of LX in the formula to calculate scatter for the M500 − LBCG relation.
Here, we present 1.4 GHz NVSS radio contours (green) overlaid on optical images from SAO-DSS with the EP marked (red X). Co-ordinates are sexagesimal right ascension and declination.
© ESO, 2014