value	unc_up	unc_lo	author	ref	method
6.54	0.119	0.119	Masiero	2011ApJ...741...68M	NEATM
6.71	1.618	1.618	Masiero	2017AJ....154..168M	NEATM
6.95	1.770	1.770	Masiero	2012ApJ...759L...8M	NEATM
7.16	2.330	2.330	Nugent	2016AJ....152...63N	NEATM