value unc_up unc_lo author ref method 4.62 0.199 0.199 Masiero 2011ApJ...741...68M NEATM 4.91 1.126 1.126 Masiero 2011ApJ...741...68M NEATM 5.40 1.339 1.339 Masiero 2017AJ....154..168M NEATM