FROM TH2F
constant
30.27404703021841+-0.48824002631767666
chi2/ndof = 25.84310934726445
plane
94.48927455130837+-2.5020441810244445
invpt slope = -4.1358580284012225+-0.2865080481640559
theta slope = -41.34297609933969+-1.9949127727846168
chi2/ndof = 20.177434153908205
from tgraph2D
constant
54.95056115450677+-2.2938220922641657
chi2/ndof = 710.3186714286859
plane
67.28366461694644+-10.729240424647376
invpt slope = 4.011058946123596+-1.1893422774317177
theta slope = -20.93305137088489+-9.631397745694933
chi2/ndof = 654.3778294353501