FROM TH2F
constant
8.238826455633463+-0.43271937344902944
chi2/ndof = 82.42585326865482
plane
-40.007809566977286+-2.780154866156341
invpt slope = -4.12802956817466+-0.92793421456007
theta slope = 53.33929023916378+-3.1576846259444165
chi2/ndof = 78.7545258064996
from tgraph2D
constant
91.7379602846915+-9.664515435658537
chi2/ndof = 4576.740079510387
plane
-87.22125880348916+-53.22932894362314
invpt slope = -15.640478525693467+-7.119305517510475
theta slope = 171.63023256212227+-45.02024751542318
chi2/ndof = 3480.3551402743165