FROM TH2F
constant
0.027143319223504474+-0.020923562587039646
chi2/ndof = 0.0025848106628262877
plane
0.012859354869741563+-0.05123841644289442
invpt slope = 0.012698670048642165+-0.03563026621229084
theta slope = 0.005723011190626051+-0.06416702249672504
chi2/ndof = 0.0003661460266184377
from tgraph2D
constant
0.02698316819365246+-0.0011088561116165305
chi2/ndof = 9.590582634892743e-05
plane
0.01392955777486137+-0.0008635403766068326
invpt slope = 0.01221784542481387+-0.0005833380046508081
theta slope = 0.00571559451608916+-0.0011952481553175476
chi2/ndof = 1.3096833863222452e-05