FROM TH2F
constant
0.038704389059319895+-0.01803460471057186
chi2/ndof = 0.018304110407517976
plane
0.07694889844103203+-0.12876498972388098
invpt slope = 0.008993208939494589+-0.008492521766904893
theta slope = -0.05427386406610158+-0.10797110050321844
chi2/ndof = 0.005986724677996658
from tgraph2D
constant
0.05472994206945598+-0.0028075381330836787
chi2/ndof = 0.0009774015257146367
plane
0.10761209578129342+-0.010168455774562993
invpt slope = 0.0095674641539192+-0.0008025444419798234
theta slope = -0.07913713373013431+-0.00881202972462157
chi2/ndof = 0.00035852780515970766