FROM TH2F
constant
24.073447819953163+-0.6676859953619944
chi2/ndof = 39.87556868695008
plane
21.14773327395084+-7.600619356265929
invpt slope = -14.274311054092868+-0.5610200362469956
theta slope = 43.046011701084794+-5.896590266621485
chi2/ndof = 22.069524548252325
from tgraph2D
constant
69.4140904927825+-5.387424287166887
chi2/ndof = 1712.436088230044
plane
104.07520099489724+-46.67427369130628
invpt slope = -13.354045020649554+-3.4548038824541307
theta slope = -7.3971776957204725+-37.140761757932765
chi2/ndof = 1394.394652748815