value	unc_up	unc_lo	author	ref	method
6.83	1.430	1.430	Nugent	2016AJ....152...63N	NEATM
7.98	0.370	0.370	Masiero	2012ApJ...759L...8M	NEATM
8.17	0.122	0.122	Masiero	2011ApJ...741...68M	NEATM