[G8b_run] as resquested

[Charles Hanretty]

Hello all,
      My updated momentum correction array (for protons) can be found in:
/u/home/hanretty/rootbeer2.1/NTuple_code/mom_corr_array.pro
The function I distributed earlier should still work for applying the 
corrections.

      In the attached .pdf file you will find two histograms.  The upper 
right one is the tagger sag plot I showed earlier today but zoomed in on 
the y-axis from 1 -> -0.5.  I apologize as I was wrong earlier when I said 
the dip that looked like it was from the corrected plot (blue) was from 
the uncorrected one (black).  I didn't notice that the corrected plot still 
had that dip; making the two lines different colors helped me see this.  One
thing to note is that while the corrected tagger sag plot still has a 
structure, this structure becomes flatter once the (ASU) photon energy is 
corrected.

      The bottom right plot is Etrue - Emeas v Emeas with and without the 
photon correction.  Once again the uncorrected plot is shown in black and 
the corrected one is shown in blue.  Since this is just a difference 
between the photon energies, the scale of the y-axis is in GeV.  I define 
Etrue as the kinematically fitted photon energy and Emeas as the photon 
energy passed to the fitter.

-Chuck
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