FROM TH2F
constant
0.02219662919507378+-0.0238567461806109
chi2/ndof = 0.0013748808659908328
plane
-0.011906402274561185+-0.28499039202315685
invpt slope = 0.0030440669486519233+-0.020669510616783522
theta slope = 0.023767498930539067+-0.2356778629021845
chi2/ndof = 0.00047957112943409607
from tgraph2D
constant
0.02283401593812812+-0.0008923816051527554
chi2/ndof = 3.4242831956280047e-05
plane
-0.011775686718020479+-0.005932814394156026
invpt slope = 0.003111119669655385+-0.00040392278883127263
theta slope = 0.023877282070154066+-0.004832935156730171
chi2/ndof = 1.0789047883735315e-05