FROM TH2F
constant
12.796219908251334+-0.4780208435905252
chi2/ndof = 37.2038497345449
plane
72.36355818967974+-5.039814432797316
invpt slope = -9.787629693957832+-0.3545977901277401
theta slope = -19.07844201319569+-3.9927421493310606
chi2/ndof = 23.777994509936917
from tgraph2D
constant
49.66819751957232+-4.841783981245874
chi2/ndof = 1430.0152005963284
plane
178.17608752050924+-37.81349355989737
invpt slope = -11.825533067295591+-2.631819125155273
theta slope = -86.88626385481388+-32.100481459027684
chi2/ndof = 943.2928963820971