value	unc_up	unc_lo	author	ref	method
3.31	0.720	0.720	Nugent	2016AJ....152...63N	NEATM
3.62	0.190	0.190	Masiero	2012ApJ...759L...8M	NEATM
4.14	0.070	0.070	Masiero	2014ApJ...791..121M	NEATM
4.18	0.043	0.043	Masiero	2011ApJ...741...68M	NEATM