value unc_up unc_lo author ref method 2.94 0.383 0.383 Masiero 2011ApJ...741...68M NEATM 3.10 0.690 0.690 Masiero 2020PSJ.....1....5M NEATM 3.38 0.910 0.910 Masiero 2012ApJ...759L...8M NEATM