value unc_up unc_lo author ref method 3.93 0.820 0.820 Nugent 2016AJ....152...63N NEATM 4.40 0.918 0.918 Masiero 2011ApJ...741...68M NEATM 4.81 0.262 0.262 Masiero 2011ApJ...741...68M NEATM