FROM TH2F
constant
0.016608752757400674+-0.01562838328611444
chi2/ndof = 0.008944832610099868
plane
0.06812831098448377+-0.09673127941287858
invpt slope = -0.003613490844529478+-0.012429996301103885
theta slope = -0.037440168221331234+-0.08062289082066182
chi2/ndof = 0.004329974549405147
from tgraph2D
constant
0.025302043722733675+-0.0014026843392925465
chi2/ndof = 0.00014559672832073503
plane
0.0700365482599127+-0.006195011447324165
invpt slope = -0.0012768455064810112+-0.000854820863961596
theta slope = -0.03979476156029144+-0.005536494411298807
chi2/ndof = 8.510777365315854e-05