value unc_up unc_lo author ref method 8.82 0.100 0.100 Masiero 2014ApJ...791..121M NEATM 8.97 0.370 0.370 Masiero 2012ApJ...759L...8M NEATM 9.11 0.118 0.118 Masiero 2011ApJ...741...68M NEATM