value	unc_up	unc_lo	author	ref	method
7.47	0.065	0.065	Masiero	2011ApJ...741...68M	NEATM
7.74	2.382	2.382	Masiero	2017AJ....154..168M	NEATM
8.40	1.590	1.590	Nugent	2016AJ....152...63N	NEATM