value	unc_up	unc_lo	author	ref	method
4.37	1.390	1.390	Nugent	2016AJ....152...63N	NEATM
4.39	0.224	0.224	Masiero	2011ApJ...741...68M	NEATM
5.01	1.870	1.870	Masiero	2021PSJ.....2..162M	NEATM