value unc_up unc_lo author ref method 12.76 0.193 0.193 Masiero 2011ApJ...741...68M NEATM 12.85 0.200 0.200 Masiero 2014ApJ...791..121M NEATM 16.33 0.620 0.620 Masiero 2012ApJ...759L...8M NEATM