value unc_up unc_lo author ref method 7.55 0.120 0.120 Masiero 2014ApJ...791..121M NEATM 7.76 0.820 0.820 Usui 2011PASJ...63.1117U NEATM 7.99 0.050 0.050 Masiero 2011ApJ...741...68M NEATM 8.14 1.630 1.630 Ali-Lagoa 2018A&A...612A..85A NEATM