T(K)	cross sect.	error limit
	at 662 nm

215	2.020e-17	2.400e-18
232	2.220e-17	3.300e-18
253	1.840e-17	4.300e-18
271	2.080e-17	1.800e-18
298	2.020e-17	2.000e-18
323	2.130e-17	2.200e-18
348	2.060e-17	2.700e-18