value	unc_up	unc_lo	author	ref	method
19.67	1.430	1.430	Usui	2011PASJ...63.1117U	NEATM
19.92	0.106	0.106	Masiero	2011ApJ...741...68M	NEATM
20.30	4.060	4.060	Ali-Lagoa	2018A&A...612A..85A	NEATM
20.38	6.680	6.680	Nugent	2016AJ....152...63N	NEATM