FROM TH2F
constant
32.97290972289561+-0.5657961971214224
chi2/ndof = 17.411661907729908
plane
126.04476489217916+-4.115256521647211
invpt slope = -6.900162299662084+-0.27492156966660325
theta slope = -53.23356052257317+-3.298526184060251
chi2/ndof = 9.213164641433773
from tgraph2D
constant
49.22031985552938+-2.7880583037457947
chi2/ndof = 831.7397948007664
plane
141.87921811842764+-16.900429036342327
invpt slope = -4.883102186048372+-1.2288764449846157
theta slope = -67.38263597114597+-13.921475294834783
chi2/ndof = 635.8569334781077