FROM TH2F
constant
0.041721407405792894+-0.017140966404352843
chi2/ndof = 0.022123285639014702
plane
0.06824101831693885+-0.09441295703177428
invpt slope = 0.013678717263692006+-0.008894992117414251
theta slope = -0.048719163510092804+-0.08022525592982217
chi2/ndof = 0.003980488445265364
from tgraph2D
constant
0.060545921784625006+-0.003065134667233003
chi2/ndof = 0.0014092575793090822
plane
0.08387144234402157+-0.00689724085749896
invpt slope = 0.015178192715533908+-0.0006291300850020022
theta slope = -0.06393827652394568+-0.006201190995091072
chi2/ndof = 0.00027880280253355787