value	unc_up	unc_lo	author	ref	method
16.92	4.790	4.790	Nugent	2016AJ....152...63N	NEATM
17.10	0.092	0.092	Masiero	2011ApJ...741...68M	NEATM
18.20	0.060	0.060	Masiero	2014ApJ...791..121M	NEATM