FROM TH2F
constant
0.027427656729568813+-0.02415713485289521
chi2/ndof = 0.007969049579944935
plane
0.05908388396861818+-0.16281565929107678
invpt slope = 0.008113532509303807+-0.02985414155840718
theta slope = -0.03876951024939125+-0.1245684539211815
chi2/ndof = 0.0026561697697041614
from tgraph2D
constant
0.03383538827327754+-0.0027987329736831393
chi2/ndof = 0.00039164531289367303
plane
0.06907299705304822+-0.00950354086809445
invpt slope = 0.00996344923982679+-0.001762518922814268
theta slope = -0.04863270503166845+-0.007520080737915545
chi2/ndof = 0.00012568131464476184