value	unc_up	unc_lo	author	ref	method
7.55	2.000	2.000	Nugent	2016AJ....152...63N	NEATM
7.68	0.084	0.084	Masiero	2011ApJ...741...68M	NEATM
8.20	nan	nan	Ali-Lagoa	2016A&A...591A..14A	NEATM
8.20	nan	nan	Ali-Lagoa	2016A&A...591A..14A	NEATM