FROM TH2F
constant
0.041295212990409974+-0.01832303028596704
chi2/ndof = 0.014452759747568085
plane
0.053229354754183125+-0.10653005577776939
invpt slope = 0.01002128583796803+-0.009591707430024472
theta slope = -0.031551457620727+-0.08958351373357629
chi2/ndof = 0.005209928895882214
from tgraph2D
constant
0.05375235424437588+-0.0025931418555155167
chi2/ndof = 0.0008674456239546195
plane
0.0712203805233436+-0.00849418665334375
invpt slope = 0.010967024303747448+-0.0007336310031446822
theta slope = -0.045404567322632254+-0.007296518622000869
chi2/ndof = 0.0003068021177651286