FROM TH2F
constant
0.03404098403755609+-0.017280194532615617
chi2/ndof = 0.10513627293266681
plane
-0.02181863132076861+-0.03770784725799402
invpt slope = 0.06783611191207073+-0.021715465664276356
theta slope = 0.005428127314983228+-0.050003221000086556
chi2/ndof = 0.01821535266431715
from tgraph2D
constant
0.12283759687591664+-0.010287135714488313
chi2/ndof = 0.013651445775556551
plane
-0.031010149221735662+-0.007383865415949176
invpt slope = 0.0768564468913749+-0.0028565203643108844
theta slope = 0.02446798185639105+-0.01114887095333234
chi2/ndof = 0.001571267786962686