value unc_up unc_lo author ref method 3.40 1.520 1.520 Nugent 2016AJ....152...63N NEATM 5.94 0.110 0.110 Masiero 2011ApJ...741...68M NEATM 6.00 0.137 0.137 Masiero 2011ApJ...741...68M NEATM 6.02 1.580 1.580 Nugent 2016AJ....152...63N NEATM