FROM TH2F
constant
0.03232616280355727+-0.020489516738243688
chi2/ndof = 0.009231383239469107
plane
0.04691839705211764+-0.05551234379018076
invpt slope = -0.009204179665085814+-0.028079498759477323
theta slope = -0.004434343763269599+-0.05745018186371974
chi2/ndof = 0.007875402403441584
from tgraph2D
constant
0.040704896465098256+-0.0009445097908885921
chi2/ndof = 8.564147952766271e-05
plane
0.037622217901333445+-0.0018318454645565936
invpt slope = 0.005524525151038271+-0.0011489774815565874
theta slope = -0.0024602865630550894+-0.002103643607889409
chi2/ndof = 6.980195109284853e-05