value unc_up unc_lo author ref method 4.91 1.190 1.190 Nugent 2016AJ....152...63N NEATM 5.23 0.110 0.110 Masiero 2014ApJ...791..121M NEATM 5.46 0.033 0.033 Masiero 2011ApJ...741...68M NEATM