FROM TH2F
constant
0.03247920649538841+-0.017844427506255426
chi2/ndof = 0.0823669116271105
plane
-0.017209420088475577+-0.03778515066982149
invpt slope = 0.053938448402544165+-0.02262658624492129
theta slope = 0.010330473931762375+-0.05844845332216821
chi2/ndof = 0.02210699129566653
from tgraph2D
constant
0.10014866567873335+-0.00908303436240846
chi2/ndof = 0.009652677042547984
plane
-0.031679134294238256+-0.0086985893508603
invpt slope = 0.060028169656689924+-0.003693710291283924
theta slope = 0.05200613829788704+-0.013786530363594023
chi2/ndof = 0.001989700921936058