value unc_up unc_lo author ref method 4.56 0.040 0.040 Masiero 2014ApJ...791..121M NEATM 4.59 0.020 0.020 Masiero 2011ApJ...741...68M NEATM 5.19 0.145 0.145 Masiero 2011ApJ...741...68M NEATM