value unc_up unc_lo author ref method 1.97 0.025 0.025 Masiero 2011ApJ...741...68M NEATM 2.09 0.550 0.550 Masiero 2020PSJ.....1....5M NEATM 2.21 0.450 0.450 Masiero 2020PSJ.....1....5M NEATM