FROM TH2F
constant
0.013487144369275587+-0.0181371094921116
chi2/ndof = 0.0032071198029345197
plane
0.054648066588497905+-0.20927957060741287
invpt slope = 0.000424396163428435+-0.014244968934217452
theta slope = -0.03361083201048989+-0.16597349225659158
chi2/ndof = 0.0022815428370997174
from tgraph2D
constant
0.016174708974798332+-0.0010129136412299201
chi2/ndof = 4.6169732006763464e-05
plane
0.055286298431151765+-0.009475986190656916
invpt slope = 0.0006757686871303918+-0.0006795847123929339
theta slope = -0.033083013771353816+-0.007842371774857438
chi2/ndof = 3.529460145641449e-05