value	unc_up	unc_lo	author	ref	method
0.046	0.0407	0.0407	Masiero	2017AJ....154..168M	NEATM
0.068	0.0150	0.0150	Masiero	2012ApJ...759L...8M	NEATM
0.080	0.0500	0.0500	Nugent	2016AJ....152...63N	NEATM