FROM TH2F
constant
0.01962234471355897+-0.014848426967504434
chi2/ndof = 0.012674432637878513
plane
0.06787066346779187+-0.0884363451176633
invpt slope = 0.005294082183227499+-0.01111103015893732
theta slope = -0.04720105344661768+-0.07053529144797079
chi2/ndof = 0.004753850809134025
from tgraph2D
constant
0.02993245448543043+-0.002175274911031774
chi2/ndof = 0.0004589866310465098
plane
0.08478506537817368+-0.006591833649259992
invpt slope = 0.007590924770093463+-0.000940429440445307
theta slope = -0.06348048251769473+-0.005791791612241853
chi2/ndof = 0.00016386384334277768