FROM TH2F
constant
0.00900107097818087+-0.011952997216504464
chi2/ndof = 0.010354892491534493
plane
-0.008998241594538343+-0.04616036132558287
invpt slope = 0.006159968332792746+-0.01249339400097826
theta slope = 0.010429064931690636+-0.043669871905124426
chi2/ndof = 0.005216880889956635
from tgraph2D
constant
0.017859464544885142+-0.0009663837372616354
chi2/ndof = 6.44389294076671e-05
plane
0.019690531956040494+-0.0037736950304039112
invpt slope = 0.004633141578225738+-0.0005439664042306872
theta slope = -0.008861584004010862+-0.0034550344613501973
chi2/ndof = 3.1549906508931904e-05