value	unc_up	unc_lo	author	ref	method
18.69	1.280	1.280	Usui	2011PASJ...63.1117U	NEATM
19.15	3.830	3.830	Ali-Lagoa	2018A&A...612A..85A	NEATM
20.47	0.130	0.130	Masiero	2011ApJ...741...68M	NEATM