FROM TH2F
constant
41.73672659792432+-0.8013135999517261
chi2/ndof = 7.827871441549112
plane
55.23452276089141+-4.796668992523718
invpt slope = 2.8627151472044714+-0.7092880353727842
theta slope = -15.790023522543455+-4.0776679700148
chi2/ndof = 7.674282237421778
from tgraph2D
constant
49.3949613206833+-2.558273158322244
chi2/ndof = 464.67806959864146
plane
46.97449250588591+-15.337462965438684
invpt slope = 3.6452202868759898+-2.1145712401717294
theta slope = -3.386471830972708+-12.574044118632376
chi2/ndof = 458.1699112740984