FROM TH2F
constant
0.025643025292142876+-0.023610528825184204
chi2/ndof = 0.007736397772514953
plane
0.07516445970116607+-0.16929675446262824
invpt slope = 0.006559497299401095+-0.028804616914799006
theta slope = -0.05118842639165509+-0.13300973763197355
chi2/ndof = 0.002309587558971668
from tgraph2D
constant
0.03183060640131273+-0.002327990635448186
chi2/ndof = 0.0002655574795349345
plane
0.0914133746351115+-0.005799557942234079
invpt slope = 0.004770873080262758+-0.0011563338753862256
theta slope = -0.061526933223144384+-0.004684519131463314
chi2/ndof = 4.9141034422044624e-05