FROM TH2F
constant
0.017567503091157073+-0.014548424789101289
chi2/ndof = 0.004160963085019222
plane
0.005103129065185127+-0.03432581264746745
invpt slope = 0.012175849065126568+-0.021586287279323126
theta slope = 0.0028750995147074766+-0.03894477795255665
chi2/ndof = 0.00021060261058891686
from tgraph2D
constant
0.01882381987010249+-0.0009745921172492401
chi2/ndof = 9.593280929615908e-05
plane
0.005270116919411259+-0.00043060071836921015
invpt slope = 0.011818777833158491+-0.0002481764989028918
theta slope = 0.0033949830816065655+-0.0005010090952604845
chi2/ndof = 3.882707888685324e-06