value unc_up unc_lo author ref method 4.01 0.140 0.140 Masiero 2012ApJ...759L...8M NEATM 4.95 0.015 0.015 Masiero 2011ApJ...741...68M NEATM 5.04 0.050 0.050 Masiero 2014ApJ...791..121M NEATM