FROM TH2F
constant
4.913511734663264+-0.2298553010194686
chi2/ndof = 0.5769066064335943
plane
10.128726387462073+-1.7839036944778508
invpt slope = -0.32284226116760056+-0.11989347123574828
theta slope = -3.493503978489745+-1.4517044339142768
chi2/ndof = 0.45907910366387356
from tgraph2D
constant
5.468159505949276+-0.15876989322946305
chi2/ndof = 2.4451642635415105
plane
11.929554189189403+-0.8627389221652311
invpt slope = -0.1183607350631769+-0.06692068677152051
theta slope = -5.351700743538119+-0.7041033683599106
chi2/ndof = 1.5382649884213453