value unc_up unc_lo author ref method 3.51 0.170 0.170 Masiero 2012ApJ...759L...8M NEATM 3.71 0.080 0.080 Masiero 2014ApJ...791..121M NEATM 3.75 0.018 0.018 Masiero 2011ApJ...741...68M NEATM