value unc_up unc_lo author ref method 4.03 0.970 0.970 Masiero 2021PSJ.....2..162M NEATM 4.05 0.167 0.167 Masiero 2011ApJ...741...68M NEATM 4.41 1.930 1.930 Masiero 2012ApJ...759L...8M NEATM