value	unc_up	unc_lo	author	ref	method
0.226	0.0240	0.0240	Masiero	2012ApJ...759L...8M	NEATM
0.260	0.0800	0.0800	Nugent	2016AJ....152...63N	NEATM
0.353	0.0569	0.0569	Masiero	2011ApJ...741...68M	NEATM