value	unc_up	unc_lo	author	ref	method
15.31	5.160	5.160	Nugent	2016AJ....152...63N	NEATM
17.57	0.310	0.310	Masiero	2012ApJ...759L...8M	NEATM
20.28	0.313	0.313	Masiero	2011ApJ...741...68M	NEATM