FROM TH2F
constant
11.170702707956218+-0.36686070843727364
chi2/ndof = 77.49008286746822
plane
-101.60408665622654+-3.078195232469534
invpt slope = -0.31221616388036555+-0.25382065962511213
theta slope = 124.82540089015671+-2.9207161248363547
chi2/ndof = 53.74662344883494
from tgraph2D
constant
84.28546119607901+-5.254134057047063
chi2/ndof = 2401.715446321596
plane
9.646581283104723+-35.46456305367862
invpt slope = 6.9940418578753905+-3.3039396352010506
theta slope = 50.633743466180775+-29.799658131011366
chi2/ndof = 2276.501471719764