value unc_up unc_lo author ref method 4.88 0.050 0.050 Masiero 2014ApJ...791..121M NEATM 5.04 0.060 0.060 Masiero 2011ApJ...741...68M NEATM 5.15 0.048 0.048 Masiero 2011ApJ...741...68M NEATM