FROM TH2F
constant
0.010778638192958812+-0.015476604702074839
chi2/ndof = 0.006700235122444122
plane
0.03661217773774514+-0.12254131564611555
invpt slope = 0.004250023814179633+-0.01507448327761724
theta slope = -0.025341596024920233+-0.09855742006347974
chi2/ndof = 0.003222899230379691
from tgraph2D
constant
0.01586008194565416+-0.0012660163557023534
chi2/ndof = 8.01398706456547e-05
plane
0.04227319401617223+-0.005713457910060231
invpt slope = 0.00502332544275449+-0.0008621925649852054
theta slope = -0.029159263360062235+-0.00503030698204855
chi2/ndof = 3.8019335329444506e-05