FROM TH2F
constant
5.3507762473309715+-0.2348672855464859
chi2/ndof = 0.7687019516000881
plane
8.688479267025961+-1.6535973724803683
invpt slope = -0.4696131914378233+-0.12641514789566485
theta slope = -1.5760578596118684+-1.418113916229224
chi2/ndof = 0.6243294814630994
from tgraph2D
constant
6.11068220475929+-0.13317414657215929
chi2/ndof = 1.8267413970047974
plane
10.357909868768955+-0.7305247665221213
invpt slope = -0.07688784163661427+-0.06182133285956327
theta slope = -3.628000860937653+-0.6453220933489111
chi2/ndof = 1.3822185487717713