FROM TH2F
constant
0.013763865837535413+-0.01581935858486698
chi2/ndof = 0.013746868736512822
plane
0.07301936022115892+-0.11229829447167415
invpt slope = 0.00737744087566925+-0.017656965819330177
theta slope = -0.055848730668387865+-0.08947211992973246
chi2/ndof = 0.0028306656378650204
from tgraph2D
constant
0.024695647629238975+-0.0021688426544503796
chi2/ndof = 0.0002916404644963967
plane
0.07160448468047145+-0.006200403733542031
invpt slope = 0.010655216252412546+-0.0009546916292072093
theta slope = -0.05727877944769155+-0.005562991462037798
chi2/ndof = 6.25357967521736e-05