value unc_up unc_lo author ref method 10.56 0.075 0.075 Masiero 2011ApJ...741...68M NEATM 9.89 0.150 0.150 Masiero 2014ApJ...791..121M NEATM 9.90 1.260 1.260 Masiero 2012ApJ...759L...8M NEATM