FROM TH2F
constant
0.00883603615864676+-0.010380584690576525
chi2/ndof = 0.023149867606409438
plane
0.077645559512075+-0.09839281190173499
invpt slope = -0.0011933741142397445+-0.00545022334201981
theta slope = -0.052880232705588635+-0.07627733420788155
chi2/ndof = 0.017471571814851462
from tgraph2D
constant
0.03332214074615557+-0.004579804603651306
chi2/ndof = 0.0019086895297921415
plane
0.17425469603448085+-0.011035184712010563
invpt slope = 0.0033374562648107176+-0.0007780945806230117
theta slope = -0.13748496086126874+-0.008952086050357463
chi2/ndof = 0.00044316969036869785