value unc_up unc_lo author ref method 4.93 0.120 0.120 Masiero 2014ApJ...791..121M NEATM 5.40 0.130 0.130 Masiero 2011ApJ...741...68M NEATM 5.92 0.220 0.220 Masiero 2012ApJ...759L...8M NEATM