FROM TH2F
constant
24.445834168949617+-0.5709154546303423
chi2/ndof = 59.16447136772155
plane
85.75272192561644+-5.056920056188441
invpt slope = -3.4137666099860517+-0.2613676834008142
theta slope = -37.23262693364322+-3.815348994608469
chi2/ndof = 57.27773545224693
from tgraph2D
constant
80.28605604437867+-4.307793496166421
chi2/ndof = 1466.0096965072912
plane
60.522532651180015+-45.38680866615393
invpt slope = 4.772875601005934+-2.0235464176099875
theta slope = 3.4598497484255653+-35.700053355197234
chi2/ndof = 1401.9623192398474