FROM TH2F
constant
0.0206836691648483+-0.01706807792156196
chi2/ndof = 0.012556896936395636
plane
0.07521554156664903+-0.10752961341548016
invpt slope = 0.007069560852023643+-0.014092704145633442
theta slope = -0.055781447469648276+-0.09105005028914837
chi2/ndof = 0.004249203914389451
from tgraph2D
constant
0.030742474567003027+-0.0023049763760610406
chi2/ndof = 0.0004090945392618762
plane
0.09006865730439668+-0.005398765956418242
invpt slope = 0.010186054651543104+-0.0008961555426579492
theta slope = -0.07172715381038686+-0.004981595557861217
chi2/ndof = 8.569083047575095e-05