FROM TH2F
constant
0.03362826703972658+-0.017645759914714555
chi2/ndof = 0.031609405739769836
plane
0.09031744733834984+-0.10214145106483076
invpt slope = 0.014932002002374847+-0.011403827855499454
theta slope = -0.07476168009880409+-0.08748111099039921
chi2/ndof = 0.009207251452342599
from tgraph2D
constant
0.06132270612851992+-0.004182356212910903
chi2/ndof = 0.0020115919005911937
plane
0.10300493721704976+-0.012136428573684369
invpt slope = 0.01903988450866921+-0.0012148308436157895
theta slope = -0.08965601372527819+-0.011039295951223178
chi2/ndof = 0.0005434386854076662