FROM TH2F
constant
17.90966628007029+-0.49195784070563703
chi2/ndof = 15.974945159234096
plane
36.71464790976803+-4.239048294302285
invpt slope = -3.976150037657357+-0.2614171327290845
theta slope = -3.243397940121644+-3.420949872736942
chi2/ndof = 13.157378651390035
from tgraph2D
constant
32.68834988859943+-2.7196191466241517
chi2/ndof = 576.9136077266667
plane
99.36702146468083+-23.62885494063907
invpt slope = -0.8010330759989768+-1.4763424705161186
theta slope = -55.080657108214524+-19.540249580691544
chi2/ndof = 534.6861593892672