value unc_up unc_lo author ref method 7.78 1.360 1.360 Nugent 2016AJ....152...63N NEATM 7.81 0.080 0.080 Masiero 2014ApJ...791..121M NEATM 8.21 0.065 0.065 Masiero 2011ApJ...741...68M NEATM 8.48 0.160 0.160 Masiero 2014ApJ...791..121M NEATM 9.07 0.047 0.047 Masiero 2011ApJ...741...68M NEATM