value unc_up unc_lo author ref method 5.41 0.860 0.860 Nugent 2016AJ....152...63N NEATM 7.31 0.150 0.150 Masiero 2014ApJ...791..121M NEATM 7.56 0.122 0.122 Masiero 2011ApJ...741...68M NEATM