value unc_up unc_lo author ref method 5.50 1.430 1.430 Masiero 2017AJ....154..168M NEATM 5.59 0.298 0.298 Masiero 2011ApJ...741...68M NEATM 6.02 0.266 0.266 Masiero 2011ApJ...741...68M NEATM