value	unc_up	unc_lo	author	ref	method
6.88	1.280	1.280	Nugent	2016AJ....152...63N	NEATM
7.21	0.850	0.850	Masiero	2012ApJ...759L...8M	NEATM
7.68	0.117	0.117	Masiero	2011ApJ...741...68M	NEATM