value unc_up unc_lo author ref method 6.89 0.080 0.080 Masiero 2011ApJ...741...68M NEATM 6.93 0.090 0.090 Masiero 2014ApJ...791..121M NEATM 7.07 0.080 0.080 Masiero 2014ApJ...791..121M NEATM 7.12 0.063 0.063 Masiero 2011ApJ...741...68M NEATM