FROM TH2F
constant
0.03724958609311647+-0.02001332514044316
chi2/ndof = 0.011387568494725542
plane
0.0522922421086658+-0.16562732435674873
invpt slope = 0.007298051016367078+-0.010870399846737034
theta slope = -0.03096795466651881+-0.13602856524280876
chi2/ndof = 0.005433960705523342
from tgraph2D
constant
0.0473018127553362+-0.0026289941059973653
chi2/ndof = 0.0006704261709197719
plane
0.09204140659728767+-0.013163354899997209
invpt slope = 0.006839675073564992+-0.0010210514382755981
theta slope = -0.0600276984772617+-0.010742951583769094
chi2/ndof = 0.00035810107166656016