FROM TH2F
constant
0.01698154712388266+-0.022348540630608284
chi2/ndof = 0.002158650083451903
plane
0.04416321378653924+-0.27096750778815903
invpt slope = 0.002129848601098518+-0.017261256993375957
theta slope = -0.024880493743877914+-0.22267711985519079
chi2/ndof = 0.001605343126590785
from tgraph2D
constant
0.01808568739001828+-0.0011375234246799046
chi2/ndof = 5.0464422126231116e-05
plane
0.05191932387147573+-0.010756005132820195
invpt slope = 0.0021492862598487404+-0.0006855279044554473
theta slope = -0.030229495944121262+-0.008764082568294517
chi2/ndof = 3.5220114294100556e-05