FROM TH2F
constant
0.010978876065847578+-0.00972859101990356
chi2/ndof = 0.09988848850485592
plane
0.14374689357500536+-0.07817834361347042
invpt slope = -0.00249701198696548+-0.0028451889058213114
theta slope = -0.0996247667303532+-0.06333536847984764
chi2/ndof = 0.0737034983958197
from tgraph2D
constant
0.11239395135367834+-0.017495941156101306
chi2/ndof = 0.04040625023618051
plane
0.3759392828393044+-0.04137038953975404
invpt slope = 0.02800634060671056+-0.004354421357254245
theta slope = -0.34949526289445526+-0.034958617358836964
chi2/ndof = 0.01803439459615691