FROM TH2F
constant
0.005076075963869754+-0.012042870994533194
chi2/ndof = 0.017637573583262327
plane
0.10770389184871493+-0.15192704622546707
invpt slope = -0.004069270791246778+-0.019545567798096356
theta slope = -0.07088671173420713+-0.1167391041350444
chi2/ndof = 0.0037031423124826335
from tgraph2D
constant
0.02153985286760784+-0.0018464499323550744
chi2/ndof = 0.00012955633940253425
plane
0.07899997364197008+-0.005503706462138347
invpt slope = -0.0002118010947135937+-0.0008763546818478654
theta slope = -0.04915741447428415+-0.0044572570503411514
chi2/ndof = 3.058847594706169e-05