systematic shift in reconstructed Z

[Blake Leverington <leverinb@uregina.ca>]

Hey,

While going doing some recalibration of the BCAL, I noticed that there 
is a systematic shift in the reconstructed Z position from the thrown Z 
position which has been wrecking my calibrations. I've attached a plot 
of the difference in reconstructed Z - generated Z as a function of 
generated Z [recZgenZ4m.png].     

 m_genZ[i] = trueShowers[i]->z;  

 and 

m_reconZ[i] = bcalClust[i]->z;

return values approximately 8cm different over the length of the BCAL,
Any thoughts? Where can I fix this?

-Blake