value unc_up unc_lo author ref method 4.84 0.160 0.160 Masiero 2014ApJ...791..121M NEATM 5.08 0.072 0.072 Masiero 2011ApJ...741...68M NEATM 7.04 0.270 0.270 Masiero 2012ApJ...759L...8M NEATM