value	unc_up	unc_lo	author	ref	method
4.32	1.305	1.305	Masiero	2017AJ....154..168M	NEATM
4.42	0.233	0.233	Masiero	2011ApJ...741...68M	NEATM
4.60	1.010	1.010	Nugent	2016AJ....152...63N	NEATM