FROM TH2F
constant
0.026554143005920766+-0.02177570033835326
chi2/ndof = 0.004905866188515201
plane
-0.04498600909248978+-0.2706940310648795
invpt slope = 0.0010823367632933883+-0.012043038768293862
theta slope = 0.057066064520665774+-0.22411124218917566
chi2/ndof = 0.0036651550023915776
from tgraph2D
constant
0.030197602753649584+-0.001774225787016298
chi2/ndof = 0.00018887262859863295
plane
-0.06209496957931551+-0.015525070535669403
invpt slope = 0.0034888214182470494+-0.0007320991770614043
theta slope = 0.0679657605862907+-0.012654662147717127
chi2/ndof = 9.926709476307735e-05