FROM TH2F
constant
0.018410808281209345+-0.019188959471436316
chi2/ndof = 0.006351860330195458
plane
0.05012883749954093+-0.1499227818494959
invpt slope = 0.007463085605445214+-0.01854341141589988
theta slope = -0.0349847377841413+-0.12637569227849135
chi2/ndof = 0.0018998029560661678
from tgraph2D
constant
0.022416570526651677+-0.0017708707174990666
chi2/ndof = 0.00017561505349702154
plane
0.057985752925321474+-0.007164113206366478
invpt slope = 0.008751739797030643+-0.0009085745279771395
theta slope = -0.04267480835765754+-0.006274287070937125
chi2/ndof = 5.4252523602125384e-05