FROM TH2F
constant
0.012997678717896482+-0.014597146993980386
chi2/ndof = 0.009234690700907221
plane
0.06053465715377559+-0.11241200418879961
invpt slope = 0.00543357630536293+-0.014223613732903286
theta slope = -0.042772496399714185+-0.08412407183883894
chi2/ndof = 0.0015237484942911554
from tgraph2D
constant
0.020702964228736246+-0.0015989782631338982
chi2/ndof = 0.0001687442780736355
plane
0.07347919591223034+-0.004280620643079097
invpt slope = 0.005182965940809489+-0.0005838239110974724
theta slope = -0.05239714501807379+-0.0035289052527893933
chi2/ndof = 3.094400486755393e-05