value	unc_up	unc_lo	author	ref	method
6.48	2.005	2.005	Masiero	2017AJ....154..168M	NEATM
6.88	1.910	1.910	Masiero	2012ApJ...759L...8M	NEATM
7.15	0.039	0.039	Masiero	2011ApJ...741...68M	NEATM