value unc_up unc_lo author ref method 18.42 0.790 0.790 Masiero 2012ApJ...759L...8M NEATM 21.16 0.110 0.110 Masiero 2014ApJ...791..121M NEATM 21.40 0.075 0.075 Masiero 2011ApJ...741...68M NEATM