FROM TH2F
constant
11.02861210401702+-0.5695357268797503
chi2/ndof = 80.6676445069668
plane
222.6049087185806+-9.994220761760836
invpt slope = -3.7863231589222535+-0.4256160136650203
theta slope = -154.099251158558+-7.463049153100152
chi2/ndof = 70.75913288921616
from tgraph2D
constant
90.89359238534472+-12.20673859215969
chi2/ndof = 5811.174208507625
plane
548.5166148505627+-118.99551044790701
invpt slope = -2.1347858969000546+-7.58411459830272
theta slope = -366.3876667760535+-96.95853336634767
chi2/ndof = 4310.724464933573