FROM TH2F
constant
0.01463274906582499+-0.0158836008826546
chi2/ndof = 0.005034929946419157
plane
0.03519768356102162+-0.10007496688592322
invpt slope = 0.004699151151934036+-0.013364780903380644
theta slope = -0.023137543712712556+-0.08425825527186212
chi2/ndof = 0.001924354752258759
from tgraph2D
constant
0.01834738095947022+-0.001082931174908571
chi2/ndof = 7.388261556435948e-05
plane
0.0354964910213859+-0.004074752159538654
invpt slope = 0.0052277252222877255+-0.0005619070956219656
theta slope = -0.022921540568333378+-0.0036895823564680797
chi2/ndof = 2.8006673879269764e-05