value unc_up unc_lo author ref method 15.22 0.370 0.370 Masiero 2012ApJ...759L...8M NEATM 15.29 0.200 0.200 Masiero 2014ApJ...791..121M NEATM 16.59 0.225 0.225 Masiero 2011ApJ...741...68M NEATM