value	unc_up	unc_lo	author	ref	method
27.75	1.900	1.900	Usui	2011PASJ...63.1117U	NEATM
28.64	5.730	5.730	Ali-Lagoa	2018A&A...612A..85A	NEATM
31.50	0.740	0.740	Masiero	2012ApJ...759L...8M	NEATM
33.62	2.500	2.500	Tedesco	2002AJ....123.1056T	STM