value unc_up unc_lo author ref method 5.05 1.017 1.017 Masiero 2011ApJ...741...68M NEATM 5.15 0.695 0.695 Masiero 2011ApJ...741...68M NEATM 6.07 0.610 0.610 Masiero 2012ApJ...759L...8M NEATM