value	unc_up	unc_lo	author	ref	method
6.63	0.098	0.098	Masiero	2011ApJ...741...68M	NEATM
6.63	1.820	1.820	Nugent	2016AJ....152...63N	NEATM
6.78	1.570	1.570	Masiero	2020PSJ.....1....5M	NEATM