value unc_up unc_lo author ref method 13.15 0.280 0.280 Masiero 2014ApJ...791..121M NEATM 13.72 1.510 1.510 Masiero 2012ApJ...759L...8M NEATM 14.66 0.108 0.108 Masiero 2011ApJ...741...68M NEATM