p (Torr)	abs. cross sect.	error limit
		at 504.8 nm	
---------------------------------------------------
40		5.55e-19		1.32e-19
80		5.41e-19		1.21e-19
120		5.75e-19		0.91e-19
160		5.45e-19		1.35e-19
200		5.61e-19		1.17e-19