FROM TH2F
constant
44.870895432302454+-1.0461415215090193
chi2/ndof = 16.533177105423658
plane
117.38123495492025+-13.007412346740498
invpt slope = -13.448894596695192+-0.8100545389068361
theta slope = -30.694274681954937+-10.219395074491164
chi2/ndof = 9.532936234449862
from tgraph2D
constant
62.88630641072408+-4.57331758144345
chi2/ndof = 941.1855166565582
plane
85.2547859224893+-46.013700582510076
invpt slope = -13.165189655254803+-3.041252677523905
theta slope = 0.7713052874481932+-35.32749864677301
chi2/ndof = 677.3456299684119