value unc_up unc_lo author ref method 3.70 0.680 0.680 Nugent 2016AJ....152...63N NEATM 4.59 0.238 0.238 Masiero 2011ApJ...741...68M NEATM 4.60 1.020 1.020 Nugent 2016AJ....152...63N NEATM