FROM TH2F
constant
0.015163864726132561+-0.03078541124335084
chi2/ndof = 0.002682022233869535
plane
0.0420451930656967+-0.63684478354375
invpt slope = 0.00037449716680050386+-0.034812467042370274
theta slope = -0.02272587136751486+-0.5202775772953641
chi2/ndof = 0.0029272144063940677
from tgraph2D
constant
0.016707120554659637+-0.0015728829158773525
chi2/ndof = 4.453129200707577e-05
plane
0.026623824321923457+-0.0289835002225338
invpt slope = 0.003347115485457844+-0.0016381854129737037
theta slope = -0.011828167253042511+-0.02365270695808969
chi2/ndof = 3.7809667056956895e-05