FROM TH2F
constant
0.010491375797594125+-0.013566842831890684
chi2/ndof = 0.015757420097693712
plane
0.05348652518213389+-0.1990338442478718
invpt slope = -0.004285692553331703+-0.005717637136228647
theta slope = -0.01888341370904949+-0.17396031814799626
chi2/ndof = 0.005788240619299551
from tgraph2D
constant
0.02572365984730915+-0.0012494679871193214
chi2/ndof = 9.679255555241802e-05
plane
0.04770027598343475+-0.012825585901261694
invpt slope = -0.0008027158687722634+-0.0006431871688545355
theta slope = -0.017792779912250308+-0.011140832199197582
chi2/ndof = 9.414515100295713e-05