FROM TH2F
constant
0.008115941701280317+-0.014244245945160444
chi2/ndof = 0.0031713785416772867
plane
0.019481878501031655+-0.1522221579421188
invpt slope = 0.0026330834476848627+-0.013726463846238619
theta slope = -0.01147861683713357+-0.12082166339349044
chi2/ndof = 0.0023282268033259505
from tgraph2D
constant
0.010272860709860023+-0.0010596641513300207
chi2/ndof = 5.0529965112558044e-05
plane
0.03935636026956453+-0.009042525112547696
invpt slope = 0.003177749542560556+-0.0007923333785276816
theta slope = -0.026136266017233414+-0.007177124037434183
chi2/ndof = 3.437445427574001e-05