FROM TH2F
constant
0.011073885187389321+-0.009566593554829275
chi2/ndof = 0.004842150135550049
plane
0.0016496044911090428+-0.023012082200208745
invpt slope = 0.005472587311114269+-0.009943099591560823
theta slope = 0.004004990570580063+-0.025636631329940058
chi2/ndof = 0.0021951998511639784
from tgraph2D
constant
0.01467941808859037+-0.0008053378833307199
chi2/ndof = 9.14482439938854e-05
plane
0.0011039474758297078+-0.0012199672202536027
invpt slope = 0.005648835122803022+-0.00044486077900841614
theta slope = 0.007989488195148362+-0.0013369386346931045
chi2/ndof = 3.813665830293063e-05