FROM TH2F
constant
0.02430272936549439+-0.019640713052855148
chi2/ndof = 0.04750909724190362
plane
0.014835183008155691+-0.04332562957819549
invpt slope = 0.003787183543008069+-0.020104552147888796
theta slope = 0.009282111342130594+-0.08818891565186936
chi2/ndof = 0.04740597907406136
from tgraph2D
constant
0.05997891287195252+-0.006919226148127351
chi2/ndof = 0.0036385524752110075
plane
-0.0033428304163090365+-0.010123807400312199
invpt slope = 0.025757400882645155+-0.005892669393818686
theta slope = 0.05929777202869394+-0.019685231575511886
chi2/ndof = 0.001996437320226261