FROM TH2F
constant
35.86998359270418+-0.9715693166051514
chi2/ndof = 45.30478241136243
plane
163.99637797363755+-8.318568243281534
invpt slope = 10.979703683969023+-1.5587668541929902
theta slope = -119.45102684141982+-6.114849265799269
chi2/ndof = 33.34136712920742
from tgraph2D
constant
77.79844663731629+-6.706121607821868
chi2/ndof = 1843.8547483248592
plane
179.91919542872765+-48.59223341219536
invpt slope = 8.998609606800434+-6.9110741960039
theta slope = -103.0095804094338+-37.78991120029469
chi2/ndof = 1410.0661346974066