FROM TH2F
constant
0.017507392489476425+-0.015486358329408402
chi2/ndof = 0.005829862418628238
plane
0.006342346343373044+-0.07363584223458357
invpt slope = -0.0006856753492194243+-0.011300785570185214
theta slope = 0.011886300464281406+-0.07047514392975815
chi2/ndof = 0.005584989609167993
from tgraph2D
constant
0.0217595079328221+-0.0010110962891435144
chi2/ndof = 8.280757217791012e-05
plane
0.02026856520977102+-0.004590603394777384
invpt slope = 0.0034539387666152805+-0.0006878754244781905
theta slope = -0.004216414572129604+-0.004428701200522492
chi2/ndof = 6.371467720723517e-05