FROM TH2F
constant
0.004557343615110253+-0.012535939528283207
chi2/ndof = 0.017553583850032924
plane
-0.06673142133989973+-0.1366707324886473
invpt slope = 0.0042414816633539595+-0.02750962554167165
theta slope = 0.06580189155252222+-0.13914967986839774
chi2/ndof = 0.005981692143138621
from tgraph2D
constant
0.020860986760460686+-0.0012689145639916298
chi2/ndof = 5.313475763339121e-05
plane
0.0038302855418548276+-0.013204623373827598
invpt slope = 0.002230884193042186+-0.001326481089248424
theta slope = 0.012246748959995342+-0.010975581985188401
chi2/ndof = 5.032996042579279e-05