FROM TH2F
constant
0.01442763573338597+-0.016196315929482362
chi2/ndof = 0.007578267406116214
plane
0.008330575894913032+-0.09279066317305582
invpt slope = 8.983555072928899e-05+-0.00787504387321982
theta slope = 0.005297799466952701+-0.08449590428130484
chi2/ndof = 0.007778997668205493
from tgraph2D
constant
0.021598497219671636+-0.0013585558670103093
chi2/ndof = 0.00011074044262838093
plane
0.04533878666401382+-0.00926808090904417
invpt slope = 3.476728666465339e-05+-0.0006255628604813395
theta slope = -0.021019145838544934+-0.00824645770625334
chi2/ndof = 0.00010255951118238707