FROM TH2F
constant
0.039024234002425294+-0.02082312657083872
chi2/ndof = 0.015099206648224102
plane
-0.00860698338829571+-0.0848932891829796
invpt slope = 0.009246580161423615+-0.01859615589971535
theta slope = 0.03261811579095391+-0.07739413439718813
chi2/ndof = 0.010376691453447695
from tgraph2D
constant
0.051682092542143+-0.0030390558775765654
chi2/ndof = 0.000914350202064239
plane
-0.002476278572724395+-0.009018947727593752
invpt slope = 0.01742180536919682+-0.0015937522949816567
theta slope = 0.022631724638047565+-0.00809517878195453
chi2/ndof = 0.00038732253088552586