FROM TH2F
constant
30.624976606408325+-0.6266002756882614
chi2/ndof = 49.20579329825635
plane
76.06590939671793+-6.174872057806365
invpt slope = -4.501244836530245+-0.31631815543083397
theta slope = -20.97882648742256+-4.777028877888521
chi2/ndof = 47.308817456971575
from tgraph2D
constant
81.07034877578937+-5.4324006215175835
chi2/ndof = 2478.9220289766126
plane
98.28072863553356+-53.68434225706538
invpt slope = 4.710970794893967+-2.08520949257513
theta slope = -26.189531829577394+-42.83009891530553
chi2/ndof = 2389.5040711111187