FROM TH2F
constant
12.519073708709723+-0.23330399754091713
chi2/ndof = 7.912405747280983
plane
24.574476960822757+-0.7207023645646488
invpt slope = 0.10229342058578217+-0.11976162669491068
theta slope = -15.282700121740428+-0.6796996761140075
chi2/ndof = 5.75499110096436
from tgraph2D
constant
20.224719396289117+-1.4222075562092282
chi2/ndof = 501.62323423960055
plane
23.61159423627853+-3.207128218221625
invpt slope = 3.2764353556681716+-0.5524117018814386
theta slope = -21.37905549400041+-3.493638027257932
chi2/ndof = 387.3415154525521