[G8b_run] Polarization modification

[Michael Dugger]

Hi,

I have made some slight changes to the polarization modification. Volker 
and Ken helped me determine that there was an inconsistency in how I was 
determining which polarization look-up table to use for each event. The 
inconsistency led to the coherent edge being wrong by up to 4 MeV (~ half 
an eCounter).

The results are very similar to what I had shown previously. A pdf showing 
a comparison of the new results to the old ones can be found at
http://www.jlab.org/Hall-B/secure/g8b/ASU/polCorrectionV3.pdf
where the new results are in blue.

Note: There is one difference in results worth mentioning. I no longer see 
the need to remove eCounters > 299 (within the overlap region) for the 1.9 
GeV data set :)

To implement the new modification, one only needs to replace the ldPar 
values with the those given at the bottom of this email (also listed on 
the pdf).

I apologize for any inconvenience this may cause.

Sincerely,
Michael

New ldPar values:

1.3 manual
ldPar(1) = 1.007560
ldPar(2) =-0.5872520E-02
ldPar(4) = 1.012520
ldPar(5) =-0.6416970E-02

1.5 manual
ldPar(1) = 1.012790
ldPar(2) =-0.4507690E-02
ldPar(4) = 1.002800
ldPar(5) =-0.1880110E-02

1.7 manual
ldPar(1) = 0.9893110
ldPar(2) =-0.1880110E-02
ldPar(4) = 0.9893210
ldPar(5) =-0.2127790E-02

1.7 auto
ldPar(1) = 0.9962880
ldPar(2) =-0.1159220E-02
ldPar(4) = 1.030480
ldPar(5) =-0.1110110E-01

1.9 auto
ldPar(1) = 1.012930
ldPar(2) =-0.2772200E-02
ldPar(4) = 0.9998200
ldPar(5) =-0.1616160E-02

2.1 manual
ldPar(1) = 0.9968230
ldPar(2) =-0.2214870E-01
ldPar(4) = 1.007930
ldPar(5) =-0.7647950E-02