value	unc_up	unc_lo	author	ref	method
4.74	1.250	1.250	Masiero	2017AJ....154..168M	NEATM
5.28	0.265	0.265	Masiero	2011ApJ...741...68M	NEATM
6.41	2.380	2.380	Nugent	2016AJ....152...63N	NEATM