value unc_up unc_lo author ref method 13.64 0.173 0.173 Masiero 2011ApJ...741...68M NEATM 15.44 3.452 3.452 Masiero 2017AJ....154..168M NEATM 16.59 0.170 0.170 Masiero 2012ApJ...759L...8M NEATM