FROM TH2F
constant
0.0230611243937509+-0.016007333179206364
chi2/ndof = 0.009765212175055103
plane
0.05798180417008971+-0.09455588724900775
invpt slope = 0.006705640626570341+-0.010493726215982215
theta slope = -0.040633524774645595+-0.08008326722008462
chi2/ndof = 0.0030617598123227553
from tgraph2D
constant
0.030852965065717414+-0.0017075231022456712
chi2/ndof = 0.0002799009738809831
plane
0.06576884589997642+-0.004867604026847795
invpt slope = 0.007978029822873963+-0.0005832504514047887
theta slope = -0.04828629266201201+-0.0044946696496447665
chi2/ndof = 7.963070940742643e-05