FROM TH2F
constant
0.32066990058051537+-0.06495645305878889
chi2/ndof = 0.2528273744938257
plane
0.02849172221002744+-0.1336893182318015
invpt slope = -0.00998791941659093+-0.10196453688306051
theta slope = 0.7154230406255291+-0.19270171023178137
chi2/ndof = 0.06448169240218954
from tgraph2D
constant
0.532486658382186+-0.03856073120095023
chi2/ndof = 0.13977141913130572
plane
-0.0691135633313153+-0.028913966335083172
invpt slope = 0.054663711848153475+-0.01851335670538671
theta slope = 0.851828162407898+-0.03447538723246776
chi2/ndof = 0.01736473865216566