value unc_up unc_lo author ref method 7.75 0.317 0.317 Masiero 2011ApJ...741...68M NEATM 7.96 2.080 2.080 Masiero 2020PSJ.....1....5M NEATM 8.01 0.441 0.441 Masiero 2011ApJ...741...68M NEATM