FROM TH2F
constant
0.02108067004660032+-0.014102278029518094
chi2/ndof = 0.02409861351043609
plane
0.07881305886523043+-0.08885174184247842
invpt slope = 0.0097494758570769+-0.010066086339319005
theta slope = -0.05802967116069885+-0.06768965761661651
chi2/ndof = 0.0047585418785480805
from tgraph2D
constant
0.04236491674562076+-0.0032181869023539963
chi2/ndof = 0.0011703101439770446
plane
0.1186496992006787+-0.008640076689328662
invpt slope = 0.012379539167907731+-0.001079121308463126
theta slope = -0.09645132659727146+-0.0075231652336852925
chi2/ndof = 0.00033827240509166136