FROM TH2F
constant
0.036178794770193284+-0.018562326088075978
chi2/ndof = 0.018526805573014577
plane
0.046245157411383686+-0.1337971346377965
invpt slope = 0.007876138130372717+-0.009566707424812098
theta slope = -0.026240897386309376+-0.11239091378127151
chi2/ndof = 0.011051050703828964
from tgraph2D
constant
0.05243274760463042+-0.00288309306504102
chi2/ndof = 0.0009143448188705558
plane
0.11022727868942735+-0.011213813191236195
invpt slope = 0.009542841240217998+-0.0009464699115924452
theta slope = -0.07993959999776101+-0.009581987270747163
chi2/ndof = 0.00035350118505354284