value	unc_up	unc_lo	author	ref	method
4.92	0.990	0.990	Nugent	2016AJ....152...63N	NEATM
5.90	0.189	0.189	Masiero	2011ApJ...741...68M	NEATM
6.35	1.920	1.920	Masiero	2012ApJ...759L...8M	NEATM