wavel.	wavel. range	cross section	temperature coeff.

251.7	250.0-253.3	2.64e-21	0.760
254.9	253.3-256.4	4.43e-21	1.780
258.1	256.4-259.7	4.36e-21	5.400
261.5	259.7-263.2	6.93e-21	1.350
265.0	263.2-266.7	7.01e-21	4.970
268.5	266.7-270.3	1.107e-20	2.860
272.2	270.3-274.0	1.263e-20	3.880
275.9	274.0-277.8	1.887e-20	-5.640
279.8	277.8-281.7	1.887e-20	-3.760
283.7	281.7-285.7	2.724e-20	-22.430
287.8	285.7-289.9	2.361e-20	-6.900
292.0	289.9-294.1	2.932e-20	-35.580
296.3	294.1-298.5	3.252e-20	5.540
300.8	298.5-303.0	1.585e-20	2.550
305.4	303.0-307.7	4.406e-20	-1.560
310.1	307.7-312.5	1.674e-20	-5.580
315.0	312.5-317.5	4.023e-20	8.300
320.0	317.5-322.5	1.468e-20	8.150
325.0	322.5-327.5	2.761e-20	3.940
330.0	327.5-332.5	1.909e-20	10.590
335.0	332.5-337.5	1.83e-21	1.710
340.0	337.5-342.5	2.273e-20	15.240
345.0	342.5-347.5	7.55e-21	0.510
350.0	347.5-352.5	2.20e-21	-3.430