FROM TH2F
constant
17.853656189309294+-0.4268256848510091
chi2/ndof = 6.971895112635726
plane
17.007901882577407+-0.9807021807225896
invpt slope = 2.0625537549361703+-0.503929577620292
theta slope = -2.38853184566039+-1.0506902666346605
chi2/ndof = 6.923740200144965
from tgraph2D
constant
22.46524434053842+-1.4424384851457235
chi2/ndof = 243.43356748821935
plane
13.693520731011743+-2.783076134723987
invpt slope = 8.468373169520982+-1.3971510046882776
theta slope = -0.9729791895040236+-3.1396639585091384
chi2/ndof = 186.75681977681788