FROM TH2F
constant
42.981623667586604+-1.023880993120031
chi2/ndof = 16.87100782501171
plane
64.87299023070426+-5.792193928538807
invpt slope = 9.650656760097338+-1.262830615085117
theta slope = -33.50904626709889+-4.546152277181806
chi2/ndof = 13.903591774251455
from tgraph2D
constant
57.3675148822293+-5.533758809725728
chi2/ndof = 1347.3894091506925
plane
123.45623156858474+-26.391761962622354
invpt slope = 10.123664222707205+-5.240233121020239
theta slope = -77.91548928959324+-21.696120547844746
chi2/ndof = 936.3192784961811