FROM TH2F
constant
0.019125012319864337+-0.015968724562736587
chi2/ndof = 0.010582247422697066
plane
0.06278530092712635+-0.10292811521151242
invpt slope = 0.008377071523610087+-0.014424647820918917
theta slope = -0.04523317712098522+-0.08231207815805883
chi2/ndof = 0.0020876085276354734
from tgraph2D
constant
0.027607692351241015+-0.0019433218584904465
chi2/ndof = 0.0003058964874906152
plane
0.07887805921279273+-0.004022463032978253
invpt slope = 0.00843455529092125+-0.0006891658805287657
theta slope = -0.058065549584300574+-0.003438903156769973
chi2/ndof = 5.204476209668083e-05