value unc_up unc_lo author ref method 2.94 0.850 0.850 Nugent 2016AJ....152...63N NEATM 3.21 0.629 0.629 Masiero 2011ApJ...741...68M NEATM 3.61 0.439 0.439 Masiero 2011ApJ...741...68M NEATM