FROM TH2F
constant
0.02275340936963913+-0.02224048862473405
chi2/ndof = 0.012881235761265005
plane
0.06675139050595379+-0.14884861550679734
invpt slope = 0.00575605844150269+-0.022041581376684407
theta slope = -0.04894728628026218+-0.14058376081464827
chi2/ndof = 0.009652526926847248
from tgraph2D
constant
0.03307283440868644+-0.0024124428414222638
chi2/ndof = 0.00029681390361183113
plane
0.08741045010199591+-0.009044005136653663
invpt slope = 0.007722963565841008+-0.001450184537973316
theta slope = -0.06403156637565709+-0.0081586135926927
chi2/ndof = 9.279439660690973e-05