FROM TH2F
constant
0.040240712053760994+-0.017730780111448918
chi2/ndof = 0.010768085288192017
plane
0.06671950042768246+-0.1180305506151112
invpt slope = 0.007801906498383366+-0.008274005354612365
theta slope = -0.040015769445948264+-0.09715591262165829
chi2/ndof = 0.0030094348062766683
from tgraph2D
constant
0.04924225641483118+-0.0019240408501102581
chi2/ndof = 0.0004960590477580865
plane
0.07430398360500898+-0.006206359508442679
invpt slope = 0.00795315074004656+-0.00047306442283576806
theta slope = -0.044632495093263815+-0.005284309294869492
chi2/ndof = 0.00014951736637752077