value unc_up unc_lo author ref method 13.40 3.810 3.810 Masiero 2017AJ....154..168M NEATM 13.98 0.280 0.280 Masiero 2012ApJ...759L...8M NEATM 16.60 0.098 0.098 Masiero 2011ApJ...741...68M NEATM