FROM TH2F
constant
14.678398033431352+-0.541819121425142
chi2/ndof = 128.00724880850893
plane
-136.33478169849974+-3.734459915513024
invpt slope = -7.792683707647939+-1.447381751159208
theta slope = 186.48310590385097+-3.8259640479513366
chi2/ndof = 82.12453388726298
from tgraph2D
constant
140.5256384987738+-7.614236262113479
chi2/ndof = 3188.7126626908234
plane
-26.83772917975712+-46.19971183718474
invpt slope = 0.2286680993997281+-5.8851071380479
theta slope = 145.67944502615273+-40.342680442059745
chi2/ndof = 2631.2902300697024