FROM TH2F
constant
0.02747499172011873+-0.01594986118216654
chi2/ndof = 0.08683856584780124
plane
0.04745520756813071+-0.03627148776092985
invpt slope = 0.02323140795442081+-0.01967619662976377
theta slope = -0.07033983711033931+-0.05195275029733887
chi2/ndof = 0.06994581643973337
from tgraph2D
constant
0.10142587751639363+-0.008876513825456836
chi2/ndof = 0.009927854706760643
plane
-0.02440036871244697+-0.007819517696173495
invpt slope = 0.06432275948592947+-0.003136145061930246
theta slope = 0.023291640288653496+-0.011048432362007475
chi2/ndof = 0.0017691598681121687