FROM TH2F
constant
23.042573192427955+-0.6249416679384953
chi2/ndof = 49.37009967105122
plane
-3.2390793770255133+-3.046858644802522
invpt slope = -3.418094369695574+-0.5988252924512527
theta slope = 33.26852065780758+-3.026294760182992
chi2/ndof = 48.59323787134012
from tgraph2D
constant
76.8723065293939+-5.980585881868592
chi2/ndof = 2289.114078799327
plane
61.88998115738829+-30.59773107726034
invpt slope = -4.522784786046171+-6.574947595202435
theta slope = 20.666393645914297+-26.708168232572547
chi2/ndof = 2318.653593628409