FROM TH2F
constant
0.02652928588235773+-0.01766661387317981
chi2/ndof = 0.00606272516990713
plane
0.03871548989579679+-0.04213829386405292
invpt slope = -0.003468720305733555+-0.021773224508156514
theta slope = -0.010012508247592648+-0.04872199393284285
chi2/ndof = 0.004969427624936743
from tgraph2D
constant
0.030924967086232723+-0.0007649347775825711
chi2/ndof = 6.026789703755714e-05
plane
0.025159703964009947+-0.0013027764553122318
invpt slope = 0.00599783346231115+-0.0007385383917292645
theta slope = -0.0003249844864967027+-0.0015281831884034643
chi2/ndof = 3.6916901865414214e-05