value unc_up unc_lo author ref method 5.14 0.038 0.038 Masiero 2011ApJ...741...68M NEATM 5.62 0.170 0.170 Masiero 2012ApJ...759L...8M NEATM 5.76 0.060 0.060 Masiero 2014ApJ...791..121M NEATM