FROM TH2F
constant
5.535428390049258+-0.36303707036623606
chi2/ndof = 17.08812852995716
plane
-4.46941233249488+-2.8885366065065172
invpt slope = -8.055263447649358+-0.5806137644237507
theta slope = 27.811712502256107+-2.628487220374903
chi2/ndof = 10.83158793600913
from tgraph2D
constant
26.670346067322374+-3.8908686545188127
chi2/ndof = 711.5263677681276
plane
114.58358650014979+-21.785587004363602
invpt slope = -14.671522526974549+-2.226690465312202
theta slope = -59.42848467856668+-20.220405532009174
chi2/ndof = 297.7266667087192