value unc_up unc_lo author ref method 17.22 0.240 0.240 Masiero 2014ApJ...791..121M NEATM 17.55 0.128 0.128 Masiero 2011ApJ...741...68M NEATM 18.49 0.200 0.200 Masiero 2014ApJ...791..121M NEATM 19.00 0.118 0.118 Masiero 2011ApJ...741...68M NEATM