FROM TH2F
constant
0.03274739078900552+-0.013798253762266061
chi2/ndof = 0.03786859533852717
plane
-0.0013754964121333057+-0.030093564961441357
invpt slope = 0.021639600326130052+-0.009199302266730155
theta slope = 0.003304860538442809+-0.0431707636508188
chi2/ndof = 0.004459650164876343
from tgraph2D
constant
0.06484061808908126+-0.003520518565659658
chi2/ndof = 0.0023300815812284147
plane
-0.0023724085823374833+-0.002894345393137925
invpt slope = 0.022962016041804298+-0.0006694111502785541
theta slope = 0.006349703153074053+-0.0039785773711981266
chi2/ndof = 0.00028858330175612586