FROM TH2F
constant
0.02444195849316928+-0.018052500651891425
chi2/ndof = 0.013428985662398158
plane
0.09496333511195837+-0.09039757293122924
invpt slope = 0.0032252170627325855+-0.021411142593833567
theta slope = -0.06766073513900733+-0.0777191874444373
chi2/ndof = 0.0032629811034444764
from tgraph2D
constant
0.03779089483259858+-0.0022615772275279664
chi2/ndof = 0.0004347521822939913
plane
0.09304277319894698+-0.005288069551107556
invpt slope = 0.005866072944009734+-0.0012485912374660898
theta slope = -0.06562706328403797+-0.0052289849967605455
chi2/ndof = 0.00014630537607940585