FROM TH2F
constant
0.016239939855472018+-0.01512387342374663
chi2/ndof = 0.0054703408973761
plane
0.037620597299408094+-0.12624975179777623
invpt slope = -0.00028726465052549824+-0.008438390393566376
theta slope = -0.016289058190220907+-0.10585598243584689
chi2/ndof = 0.005089724190058378
from tgraph2D
constant
0.021031937812743404+-0.0012768560080187524
chi2/ndof = 0.00012390745615677403
plane
0.07285343417041801+-0.007840657314474888
invpt slope = 0.0007900316201334488+-0.0006024650582403428
theta slope = -0.04332654782066481+-0.006482519247990839
chi2/ndof = 7.881915435542226e-05