FROM TH2F
constant
6.625620150611326+-0.41756248099874016
chi2/ndof = 52.929961674084495
plane
-59.23089218317057+-2.2315699016445234
invpt slope = 5.830054691614967+-0.9847440904802164
theta slope = 71.60576401774021+-2.6555567436306657
chi2/ndof = 29.784121187028756
from tgraph2D
constant
56.992369362027716+-5.923283607494221
chi2/ndof = 1438.4968378307726
plane
13.190223280942504+-40.30088447301105
invpt slope = 9.002091412644177+-6.552689432193456
theta slope = 26.505021489628447+-32.36454200025289
chi2/ndof = 1431.5770644951992