value unc_up unc_lo author ref method 6.09 1.250 1.250 Nugent 2016AJ....152...63N NEATM 6.39 0.090 0.090 Masiero 2014ApJ...791..121M NEATM 6.57 0.063 0.063 Masiero 2011ApJ...741...68M NEATM 6.85 0.090 0.090 Masiero 2014ApJ...791..121M NEATM 7.29 0.133 0.133 Masiero 2011ApJ...741...68M NEATM