value unc_up unc_lo author ref method 5.57 0.950 0.950 Nugent 2016AJ....152...63N NEATM 5.82 0.236 0.236 Masiero 2011ApJ...741...68M NEATM 6.70 1.740 1.740 Nugent 2016AJ....152...63N NEATM