FROM TH2F
constant
0.004791895608628799+-0.00901213456434455
chi2/ndof = 0.02336758843410617
plane
0.038976108381705676+-0.1321035546793515
invpt slope = -0.00445659913216441+-0.005262699506457494
theta slope = -0.004703709786641105+-0.11976969448451627
chi2/ndof = 0.007207233555377717
from tgraph2D
constant
0.027405260531535407+-0.0012901937762402089
chi2/ndof = 0.00010653439873584163
plane
0.03708767156746437+-0.010902180214492886
invpt slope = -0.0010969552806263227+-0.0006202050685740546
theta slope = -0.006027093199033211+-0.009802942046505213
chi2/ndof = 0.00010316201302430238