value unc_up unc_lo author ref method 15.29 0.190 0.190 Masiero 2014ApJ...791..121M NEATM 15.52 0.620 0.620 Masiero 2012ApJ...759L...8M NEATM 15.87 0.170 0.170 Masiero 2011ApJ...741...68M NEATM