value unc_up unc_lo author ref method 12.10 0.570 0.570 Masiero 2012ApJ...759L...8M NEATM 13.26 0.219 0.219 Masiero 2011ApJ...741...68M NEATM 13.37 0.210 0.210 Masiero 2014ApJ...791..121M NEATM