value unc_up unc_lo author ref method 14.22 4.610 4.610 Nugent 2016AJ....152...63N NEATM 20.29 0.610 0.610 Masiero 2014ApJ...791..121M NEATM 21.68 0.926 0.926 Masiero 2011ApJ...741...68M NEATM