value unc_up unc_lo author ref method 5.75 0.100 0.100 Masiero 2014ApJ...791..121M NEATM 5.93 0.270 0.270 Masiero 2012ApJ...759L...8M NEATM 5.99 0.048 0.048 Masiero 2011ApJ...741...68M NEATM