value unc_up unc_lo author ref method 10.13 0.089 0.089 Masiero 2011ApJ...741...68M NEATM 10.22 0.390 0.390 Masiero 2012ApJ...759L...8M NEATM 9.26 0.220 0.220 Masiero 2014ApJ...791..121M NEATM