value unc_up unc_lo author ref method 3.45 0.233 0.233 Masiero 2011ApJ...741...68M NEATM 3.52 0.164 0.164 Masiero 2011ApJ...741...68M NEATM 4.14 0.160 0.160 Masiero 2012ApJ...759L...8M NEATM