value unc_up unc_lo author ref method 11.75 0.250 0.250 Masiero 2014ApJ...791..121M NEATM 12.08 0.157 0.157 Masiero 2011ApJ...741...68M NEATM 13.60 0.220 0.220 Masiero 2012ApJ...759L...8M NEATM