FROM TH2F
constant
0.03148621349377105+-0.01765629314403798
chi2/ndof = 0.03256437329508041
plane
0.006438087280932212+-0.039248457276675947
invpt slope = 0.028323885291334294+-0.019759855645779055
theta slope = -0.00537147702331924+-0.054572482184497985
chi2/ndof = 0.012242264933856275
from tgraph2D
constant
0.055882789527288965+-0.004540737232416911
chi2/ndof = 0.002412340469984147
plane
0.0018952429383679342+-0.005447897462873303
invpt slope = 0.03733985707950581+-0.002138984433269187
theta slope = -0.001746413485680792+-0.00737002696993613
chi2/ndof = 0.0006644219202511393