Calculated fitting coefficients for E7M8
cos(theta_pi)	f	chi2	A	dA	B	dB	C	dC
-0.875	3	0.1942	0.831054		0.0259967		-0.312089		0.026108	0.02508
-0.625	3	1.612	1.98705		-0.690365		-0.193765		-0.13831	0.051623
-0.375	3	0.637	2.81003		-1.27357		0.194573		-0.062084	0.054014
-0.125	3	0.7846	3.74608		-1.23186		-0.299606		-0.16256	0.059215
0.125	3	1.496	3.80004		-0.599521		-0.790492		-0.27975	0.053841
0.375	3	1.356	3.10814		-0.0495652		-0.0420099		-0.49691	0.044268
0.625	3	1.377	1.90419		-0.161187		0.280997		-0.35896	0.032802
0.875	3	1.991	1.14912		-0.499779		0.322657		-0.24519	0.031887