value unc_up unc_lo author ref method 8.19 0.040 0.040 Masiero 2014ApJ...791..121M NEATM 8.29 0.102 0.102 Masiero 2011ApJ...741...68M NEATM 8.65 0.310 0.310 Masiero 2012ApJ...759L...8M NEATM