value	unc_up	unc_lo	author	ref	method
4.36	1.430	1.430	Nugent	2016AJ....152...63N	NEATM
4.83	1.310	1.310	Masiero	2012ApJ...759L...8M	NEATM
6.55	0.027	0.027	Masiero	2011ApJ...741...68M	NEATM