value	unc_up	unc_lo	author	ref	method
19.12	1.430	1.430	Usui	2011PASJ...63.1117U	NEATM
19.69	3.940	3.940	Ali-Lagoa	2018A&A...612A..85A	NEATM
20.00	5.090	5.090	Nugent	2016AJ....152...63N	NEATM
20.24	0.820	0.820	Masiero	2012ApJ...759L...8M	NEATM
20.49	1.500	1.500	Tedesco	2002AJ....123.1056T	STM