value unc_up unc_lo author ref method 5.34 0.040 0.040 Masiero 2014ApJ...791..121M NEATM 5.61 0.180 0.180 Masiero 2012ApJ...759L...8M NEATM 5.64 0.028 0.028 Masiero 2011ApJ...741...68M NEATM