FROM TH2F
constant
0.017283432286413998+-0.019819315809550556
chi2/ndof = 0.0045994467608572905
plane
0.03485248605616588+-0.2552606283862357
invpt slope = 0.0008469446180284889+-0.013533189919340757
theta slope = -0.014692820823524359+-0.19665690123247753
chi2/ndof = 0.004643456542423818
from tgraph2D
constant
0.021741858919315588+-0.0009968763077359178
chi2/ndof = 4.770059390005472e-05
plane
0.046912030268576835+-0.013973330967636114
invpt slope = -0.0005451016538288531+-0.0006039191030528273
theta slope = -0.018091663608774792+-0.01051482868613058
chi2/ndof = 4.5851687840638876e-05