value unc_up unc_lo author ref method 8.32 0.088 0.088 Masiero 2011ApJ...741...68M NEATM 8.34 0.080 0.080 Masiero 2014ApJ...791..121M NEATM 8.40 0.160 0.160 Masiero 2014ApJ...791..121M NEATM 8.43 0.079 0.079 Masiero 2011ApJ...741...68M NEATM