value unc_up unc_lo author ref method 9.62 2.310 2.310 Masiero 2012ApJ...759L...8M NEATM 9.86 0.210 0.210 Masiero 2011ApJ...741...68M NEATM 9.97 3.601 3.601 Masiero 2017AJ....154..168M NEATM