value unc_up unc_lo author ref method 3.02 0.630 0.630 Nugent 2016AJ....152...63N NEATM 3.24 0.640 0.640 Nugent 2016AJ....152...63N NEATM 4.14 0.250 0.250 Masiero 2011ApJ...741...68M NEATM