value unc_up unc_lo author ref method 3.81 0.340 0.340 Masiero 2014ApJ...791..121M NEATM 5.03 0.037 0.037 Masiero 2011ApJ...741...68M NEATM 5.32 0.050 0.050 Masiero 2012ApJ...759L...8M NEATM