value unc_up unc_lo author ref method 8.07 0.290 0.290 Masiero 2014ApJ...791..121M NEATM 8.15 0.269 0.269 Masiero 2011ApJ...741...68M NEATM 8.48 0.130 0.130 Masiero 2014ApJ...791..121M NEATM 8.97 0.145 0.145 Masiero 2011ApJ...741...68M NEATM