value unc_up unc_lo author ref method 6.42 0.250 0.250 Masiero 2012ApJ...759L...8M NEATM 6.57 0.730 0.730 Usui 2011PASJ...63.1117U NEATM 7.04 1.410 1.410 Ali-Lagoa 2018A&A...612A..85A NEATM 7.24 0.050 0.050 Masiero 2014ApJ...791..121M NEATM 7.63 0.028 0.028 Masiero 2011ApJ...741...68M NEATM