value unc_up unc_lo author ref method 11.98 0.250 0.250 Masiero 2014ApJ...791..121M NEATM 12.07 0.272 0.272 Masiero 2011ApJ...741...68M NEATM 13.71 1.140 1.140 Masiero 2012ApJ...759L...8M NEATM