value	unc_up	unc_lo	author	ref	method
3.96	1.293	1.293	Masiero	2017AJ....154..168M	NEATM
4.37	0.119	0.119	Masiero	2011ApJ...741...68M	NEATM
4.44	1.140	1.140	Nugent	2016AJ....152...63N	NEATM