value	unc_up	unc_lo	author	ref	method
0.040	0.0039	0.0039	Masiero	2011ApJ...741...68M	NEATM
0.045	0.0345	0.0345	Masiero	2017AJ....154..168M	NEATM
0.060	0.0500	0.0500	Nugent	2016AJ....152...63N	NEATM
0.074	0.0290	0.0490	Masiero	2021PSJ.....2..162M	NEATM