value unc_up unc_lo author ref method 5.14 1.270 1.270 Masiero 2021PSJ.....2..162M NEATM 5.70 0.169 0.169 Masiero 2011ApJ...741...68M NEATM 6.09 1.610 1.610 Masiero 2012ApJ...759L...8M NEATM