FROM TH2F
constant
0.017045724895929523+-0.022390731337124298
chi2/ndof = 0.006926164406407838
plane
0.08159188226805505+-0.2204570381660192
invpt slope = 0.003183607791365107+-0.028290073037443318
theta slope = -0.05641517498181922+-0.17165455178708647
chi2/ndof = 0.003120859698941643
from tgraph2D
constant
0.022440216856860328+-0.00143226109028688
chi2/ndof = 7.795212956834932e-05
plane
0.03654635413759035+-0.0071106429232928444
invpt slope = 0.006433023898077877+-0.0007319034844989991
theta slope = -0.01983812507314056+-0.005676343889046968
chi2/ndof = 1.7979203398522758e-05