value	unc_up	unc_lo	author	ref	method
0.033	0.0310	0.0310	Masiero	2012ApJ...759L...8M	NEATM
0.036	0.0210	0.0530	Masiero	2021PSJ.....2..162M	NEATM
0.036	0.0191	0.0191	Masiero	2017AJ....154..168M	NEATM
0.040	0.0300	0.0300	Nugent	2016AJ....152...63N	NEATM