value unc_up unc_lo author ref method 5.51 0.320 0.320 Masiero 2014ApJ...791..121M NEATM 5.88 0.050 0.050 Masiero 2011ApJ...741...68M NEATM 6.68 0.220 0.220 Masiero 2012ApJ...759L...8M NEATM