FROM TH2F
constant
4.829117853071068+-0.2355994519006386
chi2/ndof = 1.638472171870432
plane
5.190854481335349+-0.6308156709509831
invpt slope = -0.31577642675744444+-0.2412040225746242
theta slope = 0.324605165163085+-0.8459093098247025
chi2/ndof = 1.6559604492988436
from tgraph2D
constant
6.354368727415656+-0.7315583924866399
chi2/ndof = 54.58812352335598
plane
2.660993594785456+-1.599099267102785
invpt slope = 1.6961441803769373+-0.6609727996368339
theta slope = 2.669709142103124+-2.4252696063965224
chi2/ndof = 51.2118474957596