value unc_up unc_lo author ref method 13.67 0.570 0.570 Masiero 2012ApJ...759L...8M NEATM 15.23 0.270 0.270 Masiero 2014ApJ...791..121M NEATM 15.56 0.193 0.193 Masiero 2011ApJ...741...68M NEATM