value unc_up unc_lo author ref method 15.10 0.270 0.270 Masiero 2014ApJ...791..121M NEATM 16.16 0.232 0.232 Masiero 2011ApJ...741...68M NEATM 16.56 1.260 1.260 Masiero 2012ApJ...759L...8M NEATM