value	unc_up	unc_lo	author	ref	method
4.73	1.370	1.370	Nugent	2016AJ....152...63N	NEATM
4.92	0.243	0.243	Masiero	2011ApJ...741...68M	NEATM
6.38	1.090	1.090	Masiero	2012ApJ...759L...8M	NEATM