// jet sigma from fit
// x y dy y+ y-
7.500000	0.344414	0.018843	0.344414	0.344414
22.500000	0.326479	0.017592	0.326479	0.326479
37.500000	0.378902	0.022064	0.378902	0.378902
52.500000	0.365749	0.024662	0.365749	0.365749
67.500000	0.365501	0.028095	0.365501	0.365501
82.500000	0.385196	0.028729	0.385196	0.385196