wavel.	cross sect.	uncertainty

260.00	7.19e-19	1.15e-20
270.00	6.42e-19	1.15e-20
280.00	3.40e-19	7.65e-21
290.00	1.14e-19	2.68e-21
300.00	2.91e-20	1.91e-21
310.00	8.79e-21	1.53e-21