value unc_up unc_lo author ref method 13.19 4.810 4.810 Nugent 2016AJ....152...63N NEATM 16.40 0.076 0.076 Masiero 2011ApJ...741...68M NEATM 17.11 0.200 0.200 Masiero 2011ApJ...741...68M NEATM