value unc_up unc_lo author ref method 3.91 0.236 0.236 Masiero 2011ApJ...741...68M NEATM 4.01 0.070 0.070 Masiero 2014ApJ...791..121M NEATM 4.15 0.073 0.073 Masiero 2011ApJ...741...68M NEATM