FROM TH2F
constant
11.003196216968142+-0.4944850562715045
chi2/ndof = 33.467072719886
plane
-46.20429077295073+-5.195213242107944
invpt slope = -3.188416454740931+-0.41996485123623867
theta slope = 55.7273324053785+-4.821806507733902
chi2/ndof = 31.81668772475599
from tgraph2D
constant
43.84375066314956+-4.526394243619911
chi2/ndof = 983.4357532550032
plane
91.25996792431711+-63.01010497965307
invpt slope = -0.4995163060828952+-2.6051590238275057
theta slope = -37.740506614639+-51.70445913747035
chi2/ndof = 1013.3134509641409