FROM TH2F
constant
22.396607013975206+-0.6059352211016602
chi2/ndof = 42.11582550362377
plane
-11.516216069260427+-5.841646769942272
invpt slope = -3.2160763415187086+-0.21897805515082655
theta slope = 36.530942587504484+-4.687855905255957
chi2/ndof = 39.60481195830381
from tgraph2D
constant
65.27794849524267+-5.5556225374500325
chi2/ndof = 2067.951099231917
plane
53.71369962008657+-63.374729467374664
invpt slope = -5.703519158500614+-2.193818129748385
theta slope = 22.1425481226746+-48.761268128620216
chi2/ndof = 1926.0879386016654