FROM TH2F
constant
0.036126902920173384+-0.019298764143271113
chi2/ndof = 0.015947154380819648
plane
0.06148940911705858+-0.12671350627747496
invpt slope = 0.009466617165193704+-0.010894394310245473
theta slope = -0.041110050988399385+-0.11005133655626403
chi2/ndof = 0.007332914032483905
from tgraph2D
constant
0.0494570038078719+-0.002871890271245196
chi2/ndof = 0.0008495186342628699
plane
0.08145216928666432+-0.009796582991472123
invpt slope = 0.012220776666070883+-0.000829044864259273
theta slope = -0.06035812413303411+-0.008653986458329422
chi2/ndof = 0.00024857420199589505