value	unc_up	unc_lo	author	ref	method
6.07	1.750	1.750	Nugent	2016AJ....152...63N	NEATM
6.37	0.015	0.015	Masiero	2011ApJ...741...68M	NEATM
6.63	1.830	1.830	Masiero	2012ApJ...759L...8M	NEATM