FROM TH2F
constant
0.01555488926678848+-0.01583935953963395
chi2/ndof = 0.012839889609918605
plane
0.03058617212674576+-0.08217102936045399
invpt slope = -0.0034720141696220875+-0.018223495327007302
theta slope = -0.008079170331275802+-0.0637062004668687
chi2/ndof = 0.012496216948721713
from tgraph2D
constant
0.028350845278671336+-0.00175477377554811
chi2/ndof = 0.0002124669392303231
plane
0.09339489799051787+-0.005803418993514419
invpt slope = -0.0006245107078656858+-0.0009466904314823476
theta slope = -0.061007056595708195+-0.005218451658790283
chi2/ndof = 7.127038769469404e-05