FROM TH2F
constant
0.01647926962656565+-0.017469163108470107
chi2/ndof = 0.00926008549995311
plane
0.047059125519233184+-0.10253646615931944
invpt slope = 0.007303664018897742+-0.019451342261439856
theta slope = -0.033736171742029+-0.08554701304138208
chi2/ndof = 0.0036790054783013577
from tgraph2D
constant
0.02334920154550037+-0.0020276291987822454
chi2/ndof = 0.0002466768100659594
plane
0.059461691096366544+-0.006495258428541331
invpt slope = 0.008839931726162016+-0.0013771527951743942
theta slope = -0.04471779003358343+-0.005783366452459872
chi2/ndof = 9.402034726556308e-05