value unc_up unc_lo author ref method 5.41 0.298 0.298 Masiero 2011ApJ...741...68M NEATM 6.28 0.480 0.480 Masiero 2012ApJ...759L...8M NEATM 6.91 0.382 0.382 Masiero 2011ApJ...741...68M NEATM