FROM TH2F
constant
0.03036045672162023+-0.026886204959212123
chi2/ndof = 0.010134178339453605
plane
0.06719404046791772+-0.2079066375332941
invpt slope = 0.013339444667779714+-0.03022066318737221
theta slope = -0.05402376796084539+-0.1989095350048703
chi2/ndof = 0.001492462849916122
from tgraph2D
constant
0.03742178273329111+-0.002882603145182547
chi2/ndof = 0.00039054184195155427
plane
0.08236182362575506+-0.008649193597874581
invpt slope = 0.012383685310627241+-0.0011675463846869533
theta slope = -0.06726719743368242+-0.008579165967352536
chi2/ndof = 6.480508064912479e-05