value	unc_up	unc_lo	author	ref	method
6.61	0.500	0.500	Usui	2011PASJ...63.1117U	NEATM
6.90	1.380	1.380	Ali-Lagoa	2018A&A...612A..85A	NEATM
7.05	0.040	0.040	Masiero	2014ApJ...791..121M	NEATM
7.30	0.100	0.100	Masiero	2012ApJ...759L...8M	NEATM
7.57	0.057	0.057	Masiero	2011ApJ...741...68M	NEATM