value unc_up unc_lo author ref method 5.20 0.040 0.040 Masiero 2014ApJ...791..121M NEATM 5.59 0.021 0.021 Masiero 2011ApJ...741...68M NEATM 5.66 0.150 0.150 Masiero 2012ApJ...759L...8M NEATM