value	unc_up	unc_lo	author	ref	method
3.93	1.000	1.000	Nugent	2016AJ....152...63N	NEATM
4.50	0.192	0.192	Masiero	2011ApJ...741...68M	NEATM
4.59	1.100	1.100	Masiero	2012ApJ...759L...8M	NEATM