FROM TH2F
constant
11.750749467929168+-0.374018547686153
chi2/ndof = 42.4720133945162
plane
-70.83704197611655+-2.334523541874301
invpt slope = -2.017229991364677+-0.31755977203727703
theta slope = 92.44848898494757+-2.7243372955108547
chi2/ndof = 26.890779616274724
from tgraph2D
constant
57.27555674811807+-3.3716206444801653
chi2/ndof = 1023.104320331514
plane
34.44618427278481+-15.827808268406809
invpt slope = -11.433536335747618+-2.2060126825808526
theta slope = 40.308812360734464+-13.24596384838514
chi2/ndof = 733.7161171670942