[Halld-tagger] tagger energy tables in ccdb are up to date

[Richard Jones]

Dear colleagues,

At the photon beam meeting yesterday, the question came up whether the
tagger energy tables in ccdb reflect the latest raytracing results from Dan
Sober. I communicated with Dan, and he confirmed that the tables from
January 2017 that I received from him earlier this year are the most
up-to-date results he has produced. These are the ones in Counterbounds2017
that are posted on the wiki.

I then compared all of these with what is in ccdb at mysql://
ccdb_user at hallddb.jlab.org/ccdb
All channels agree with Dan's table within a precision of 6 sig figs. This
single set of values currently applies to all runs, both real data and mc.
They are automatically scaled by the electron beam energy, which is in
another ccdb table, so they are not expected to vary much from one run
period to another, unless a large change in the tagger magnetic field
setting is required.

-Richard Jones
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