value unc_up unc_lo author ref method 12.87 0.220 0.220 Masiero 2014ApJ...791..121M NEATM 13.08 0.167 0.167 Masiero 2011ApJ...741...68M NEATM 14.84 0.590 0.590 Masiero 2012ApJ...759L...8M NEATM