value unc_up unc_lo author ref method 7.92 0.130 0.130 Masiero 2014ApJ...791..121M NEATM 8.08 0.210 0.210 Masiero 2014ApJ...791..121M NEATM 8.31 0.029 0.029 Masiero 2011ApJ...741...68M NEATM 8.61 0.139 0.139 Masiero 2011ApJ...741...68M NEATM