value unc_up unc_lo author ref method 5.02 0.250 0.250 Masiero 2012ApJ...759L...8M NEATM 6.88 0.100 0.100 Masiero 2014ApJ...791..121M NEATM 7.02 0.181 0.181 Masiero 2011ApJ...741...68M NEATM