FROM TH2F
constant
0.36499124563721747+-0.05633681672916201
chi2/ndof = 0.5856353855191369
plane
0.15147664209104839+-0.29807942519554714
invpt slope = -0.08998427397771386+-0.02678650283493035
theta slope = 0.5312246180657214+-0.29117178839280794
chi2/ndof = 0.48790360157285584
from tgraph2D
constant
1.1461355479804127+-0.16154810164129793
chi2/ndof = 3.6275926907440184
plane
-1.8470943100858375+-0.584501131766306
invpt slope = 0.2830392304928184+-0.055405723295216376
theta slope = 1.9927788493760996+-0.5251234007718043
chi2/ndof = 2.67382476920621