FROM TH2F
constant
0.025155640836125093+-0.021786113299644087
chi2/ndof = 0.010835568639287614
plane
0.054181312925708686+-0.11050637018745485
invpt slope = 0.014444855319819485+-0.029741118745230975
theta slope = -0.043320459104523576+-0.10220307904012951
chi2/ndof = 0.0022899180571883003
from tgraph2D
constant
0.032552031870083736+-0.0025767140622829534
chi2/ndof = 0.0003983673215386468
plane
0.06944860134526872+-0.0051406027698100475
invpt slope = 0.013830192204599289+-0.0012955129814791902
theta slope = -0.05712595372287469+-0.005006871924774047
chi2/ndof = 6.959293687842902e-05