FROM TH2F
constant
0.01104319071753937+-0.009674004441489718
chi2/ndof = 0.005407130454980636
plane
0.0010899266847828083+-0.02094825347327857
invpt slope = 0.007364969598914761+-0.011489562906610129
theta slope = 0.0026138971364388424+-0.022014955410538082
chi2/ndof = 0.0013533671318953003
from tgraph2D
constant
0.01467450960725232+-0.0010382082758741374
chi2/ndof = 0.0001487469465241275
plane
5.802453705366613e-05+-0.001009630939448127
invpt slope = 0.008913505221734093+-0.0004453734731770172
theta slope = 0.003121371364996259+-0.001118517049094209
chi2/ndof = 3.112813987375631e-05