value	unc_up	unc_lo	author	ref	method
15.27	2.470	2.470	Nugent	2016AJ....152...63N	NEATM
20.80	0.140	0.140	Masiero	2014ApJ...791..121M	NEATM
21.59	0.142	0.142	Masiero	2011ApJ...741...68M	NEATM