FROM TH2F
constant
0.02035133335512935+-0.023142199638153664
chi2/ndof = 0.0032838459829598
plane
0.02448084714989359+-0.1750102705530444
invpt slope = 0.004902312628684801+-0.028104523757220754
theta slope = -0.009956035140618087+-0.13824361653579462
chi2/ndof = 0.002187069704349532
from tgraph2D
constant
0.022588682451624677+-0.0013789353739767337
chi2/ndof = 7.795997338996653e-05
plane
0.04252403752911127+-0.00676053243735161
invpt slope = 0.004025599597520203+-0.0010992232245066362
theta slope = -0.02310131085289007+-0.005429199338388002
chi2/ndof = 4.0285368769573774e-05