value unc_up unc_lo author ref method 5.52 0.110 0.110 Masiero 2014ApJ...791..121M NEATM 5.90 0.032 0.032 Masiero 2011ApJ...741...68M NEATM 6.01 0.670 0.670 Masiero 2012ApJ...759L...8M NEATM