value unc_up unc_lo author ref method 6.48 1.790 1.790 Masiero 2020PSJ.....1....5M NEATM 6.60 0.229 0.229 Masiero 2011ApJ...741...68M NEATM 6.77 0.190 0.190 Masiero 2011ApJ...741...68M NEATM