wavel.	cross section	error limit

200	8.0e-19		8.0e-20		
205	7.5e-19		1.3e-19
207	8.0e-19		1.5e-19
210	1.32e-18	3.6e-19
215	2.36e-18	1.4e-19
220	2.96e-18	1.5e-19
225	3.55e-18	4.3e-19
230	4.20e-18	1.0e-19
235	4.45e-18	1.4e-19
240	4.69e-18	1.8e-19
245	4.58e-18	4.7e-19
250	4.48e-18	2.6e-19
255	4.26e-18	2.4e-19
260	3.74e-18	2.1e-19
265	3.18e-18	1.7e-19
270	2.55e-18	4.3e-19
275	1.90e-18	1.9e-19