value unc_up unc_lo author ref method 6.65 1.750 1.750 Masiero 2021PSJ.....2..162M NEATM 6.91 1.816 1.816 Masiero 2017AJ....154..168M NEATM 7.17 2.860 2.860 Masiero 2020PSJ.....1....5M NEATM