FROM TH2F
constant
0.022042211662980652+-0.02264088279201928
chi2/ndof = 0.0034659304233165505
plane
-0.026406817244381476+-0.20251642500423778
invpt slope = 0.004479711928229867+-0.02215865514984438
theta slope = 0.03640512588158992+-0.1775775044373668
chi2/ndof = 0.0011640460593443798
from tgraph2D
constant
0.024454027138763035+-0.0012037161391576692
chi2/ndof = 6.954876209613603e-05
plane
-0.01929868936917751+-0.005423815319777088
invpt slope = 0.005094470366109449+-0.0005281769323243081
theta slope = 0.030466708581644242+-0.0045802687743334335
chi2/ndof = 1.676665661739994e-05