FROM TH2F
constant
0.032437800827078006+-0.01919925448825826
chi2/ndof = 0.017734817940601794
plane
0.1051626850093246+-0.14459898726872014
invpt slope = 0.005692132546734764+-0.012022142865073183
theta slope = -0.07077599647972704+-0.11269750865805366
chi2/ndof = 0.009364115719003106
from tgraph2D
constant
0.0478865878631325+-0.003936446310178905
chi2/ndof = 0.001441091688628476
plane
0.16640792436886698+-0.01442771073379303
invpt slope = 0.008851510696177125+-0.0014963711088216611
theta slope = -0.1244528617792647+-0.011701519918947752
chi2/ndof = 0.000531587840342015