value	unc_up	unc_lo	author	ref	method
6.15	1.690	1.690	Nugent	2016AJ....152...63N	NEATM
6.28	0.067	0.067	Masiero	2011ApJ...741...68M	NEATM
7.48	1.947	1.947	Masiero	2017AJ....154..168M	NEATM