wavel.	cross sect.	error limit

230.0	2.59e-18	8.51e-20
232.5	3.04e-18	7.09e-20
235.0	3.04e-18	
238.5	3.16e-18	
240.0	3.16e-18	
245.0	2.98e-18	
250.0	2.78e-18	8.51e-20
255.0	2.51e-18	2.23e-19
260.0	2.62e-18	3.58e-19
265.0	2.02e-18	9.19e-20
270.0	1.50e-18	1.70e-19