FROM TH2F
constant
5.868839564037479+-0.20401709623677336
chi2/ndof = 1.0600951584321945
plane
13.737619072658557+-1.156130586279201
invpt slope = -0.3292988546893743+-0.09835771603512282
theta slope = -5.583811115203462+-0.9743305847960995
chi2/ndof = 0.678500534947331
from tgraph2D
constant
6.958260024460516+-0.23307858895140893
chi2/ndof = 8.040193010873223
plane
16.960008078411214+-0.7920746130068971
invpt slope = -0.23401964095121064+-0.07346884376617287
theta slope = -8.10279164215207+-0.7171754896352208
chi2/ndof = 3.649092830923228