value unc_up unc_lo author ref method 4.13 1.230 1.230 Masiero 2021PSJ.....2..162M NEATM 4.21 1.140 1.140 Masiero 2021PSJ.....2..162M NEATM 4.78 1.780 1.780 Masiero 2012ApJ...759L...8M NEATM