value unc_up unc_lo author ref method 6.34 1.370 1.370 Nugent 2016AJ....152...63N NEATM 6.99 1.890 1.890 Nugent 2016AJ....152...63N NEATM 8.14 0.168 0.168 Masiero 2011ApJ...741...68M NEATM 8.33 0.140 0.140 Masiero 2011ApJ...741...68M NEATM