FROM TH2F
constant
0.03242094407329326+-0.016863992593768657
chi2/ndof = 0.08819557558452085
plane
0.01154923808040091+-0.03425122482990365
invpt slope = 0.035441593680815495+-0.01800673143978219
theta slope = -0.024717769559128865+-0.04751189224024704
chi2/ndof = 0.05466958036545311
from tgraph2D
constant
0.10602447158828146+-0.009196708476114347
chi2/ndof = 0.011164486964825488
plane
-0.03226456008122207+-0.008358851500188528
invpt slope = 0.06826666835749463+-0.003263144488446443
theta slope = 0.026806779281419554+-0.011439302541526497
chi2/ndof = 0.002071809852133693