value unc_up unc_lo author ref method 5.56 0.084 0.084 Masiero 2011ApJ...741...68M NEATM 6.14 1.820 1.820 Masiero 2021PSJ.....2..162M NEATM 6.81 2.350 2.350 Masiero 2012ApJ...759L...8M NEATM