value unc_up unc_lo author ref method 5.23 1.127 1.127 Masiero 2011ApJ...741...68M NEATM 5.49 0.910 0.910 Masiero 2012ApJ...759L...8M NEATM 8.09 0.388 0.388 Masiero 2011ApJ...741...68M NEATM