value unc_up unc_lo author ref method 13.51 0.140 0.140 Masiero 2014ApJ...791..121M NEATM 14.91 0.112 0.112 Masiero 2011ApJ...741...68M NEATM 16.20 0.700 0.700 Masiero 2012ApJ...759L...8M NEATM