value unc_up unc_lo author ref method 7.83 0.370 0.370 Usui 2011PASJ...63.1117U NEATM 8.20 0.150 0.150 Masiero 2012ApJ...759L...8M NEATM 8.21 1.640 1.640 Ali-Lagoa 2018A&A...612A..85A NEATM