FROM TH2F
constant
0.0289412005564796+-0.025082992914440785
chi2/ndof = 0.010874896934959934
plane
0.049992258021777994+-0.13191717762380334
invpt slope = 0.01599864839541907+-0.03450337773732912
theta slope = -0.04001850064687384+-0.13285537406440984
chi2/ndof = 0.003017849184648073
from tgraph2D
constant
0.03602056878551395+-0.0030558668856741104
chi2/ndof = 0.0004855927659914387
plane
0.06721748535973003+-0.008068230626464046
invpt slope = 0.015520574881923979+-0.0019136647178888563
theta slope = -0.05674361719656019+-0.008380914604550075
chi2/ndof = 0.0001275535977771967