value unc_up unc_lo author ref method 12.68 0.120 0.120 Masiero 2014ApJ...791..121M NEATM 12.70 0.079 0.079 Masiero 2011ApJ...741...68M NEATM 12.70 0.950 0.950 Masiero 2012ApJ...759L...8M NEATM