value unc_up unc_lo author ref method 7.93 0.037 0.037 Masiero 2011ApJ...741...68M NEATM 7.98 0.110 0.110 Masiero 2014ApJ...791..121M NEATM 7.99 0.170 0.170 Masiero 2014ApJ...791..121M NEATM 8.14 0.131 0.131 Masiero 2011ApJ...741...68M NEATM