wavel.	cross sect.	error limit(2sigma)

240	6.5e-18		1.9e-18
245	6.2e-18		2.0e-18
250	5.8e-18		2.0e-18
255	5.4e-18		1.9e-18
260	4.9e-18		1.8e-18
265	4.3e-18		1.7e-18
270	3.8e-18		1.6e-18
275	3.3e-18		1.4e-18
280	2.9e-18		1.3e-18
285	2.5e-18		1.2e-18
290	2.2e-18		1.0e-18
295	1.9e-18		9.0e-19
300	1.7e-18		9.0e-19
305	1.5e-18		8.0e-19
310	1.3e-18		7.0e-19
315	1.2e-18		7.0e-19
320	1.1e-18		6.0e-19
325	9.0e-19		6.0e-19
330	9.0e-19		5.0e-19
335	8.0e-19		5.0e-19
340	7.0e-19		4.0e-19
345	6.0e-19		4.0e-19
350	5.0e-19		3.0e-19
355	4.0e-19		3.0e-19
360	3.0e-19		2.0e-19
365	2.0e-19		1.0e-19
370	1.0e-19		1.0e-19