wavel.	cross sect.	error limit
-----------------------------------
184.950	1.329e-19	0.0002e-19
202.548	2.017e-20	0.0008e-20
206.200	1.027e-20	0.0001e-20
213.857	1.99e-21	0.001e-21
228.802	4.78e-21	0.007e-23