value unc_up unc_lo author ref method 5.10 1.490 1.490 Nugent 2016AJ....152...63N NEATM 5.14 0.217 0.217 Masiero 2011ApJ...741...68M NEATM 5.95 1.730 1.730 Nugent 2016AJ....152...63N NEATM