FROM TH2F
constant
30.295052134148122+-0.5224254958021132
chi2/ndof = 11.051237131912911
plane
91.13241534463943+-3.8998125535385024
invpt slope = -3.0508497410659907+-0.2458973265103082
theta slope = -41.36516721360279+-3.0823549158597983
chi2/ndof = 8.577923640184297
from tgraph2D
constant
40.893103163300026+-2.3443242828867352
chi2/ndof = 632.023478280217
plane
134.82122268038447+-14.575999635322823
invpt slope = -2.2935661069716886+-0.9052098873262798
theta slope = -75.95301337764636+-12.213735465875947
chi2/ndof = 466.24359476435126