FROM TH2F
constant
0.018352885284999225+-0.018786700130415637
chi2/ndof = 0.009238673262254384
plane
0.07031200453781028+-0.1483236237608714
invpt slope = 0.0066018748228060834+-0.016951263685763846
theta slope = -0.05168581875839579+-0.12095186902485114
chi2/ndof = 0.002421027921262614
from tgraph2D
constant
0.025520963042127625+-0.00200537057656262
chi2/ndof = 0.00022922613550850407
plane
0.06985906731218453+-0.006416090728314669
invpt slope = 0.00828834707963774+-0.0006903802404913103
theta slope = -0.05220400210197263+-0.005354090326724878
chi2/ndof = 3.6676198543689647e-05