value unc_up unc_lo author ref method 7.89 0.660 0.660 Masiero 2012ApJ...759L...8M NEATM 9.32 0.140 0.140 Masiero 2014ApJ...791..121M NEATM 9.55 0.133 0.133 Masiero 2011ApJ...741...68M NEATM