FROM TH2F
constant
26.462039054994257+-0.6936338971229083
chi2/ndof = 42.171983018453346
plane
60.5290622161383+-5.218491238112927
invpt slope = -15.947383791400876+-0.7387811391264132
theta slope = 2.3067718492843348+-5.204077399068225
chi2/ndof = 31.95575170961101
from tgraph2D
constant
73.27415396391932+-5.785007324124415
chi2/ndof = 2007.9785863240681
plane
73.40750312854978+-30.93022871857539
invpt slope = -14.324173652248334+-5.806820010038884
theta slope = 19.00842741485455+-27.13263702454177
chi2/ndof = 1863.4555999814204