value unc_up unc_lo author ref method 5.70 1.130 1.130 Nugent 2016AJ....152...63N NEATM 8.04 0.160 0.160 Masiero 2014ApJ...791..121M NEATM 8.41 0.032 0.032 Masiero 2011ApJ...741...68M NEATM