value unc_up unc_lo author ref method 5.07 1.490 1.490 Masiero 2012ApJ...759L...8M NEATM 6.15 0.063 0.063 Masiero 2011ApJ...741...68M NEATM 6.39 1.590 1.590 Masiero 2021PSJ.....2..162M NEATM