[G12] energy corrections

[Mukesh Saini]

Hello,

I checked a few runs in my data and compared the photon energies in my
data-ntuples against  the energies provided in the file:

/group/clas/parms/pcor/g12/tagger_energies_reported_by_tagr_bank.txt

Some of the photon energies in my data-ntuples are off by fractions of
MeV (at most 0.5 MeV) from those in the file. I am guessing that is due
to some tage correction function applied in CLASEvent. I couldn't find
one during the first lookup of the code I did and I will look into this
further.

In case, anyone is aware where this further correction gets applied, and
if its necessary, We might have to add this correction in
post-processing Beam Energy Corrections also. To reverse lookup and
correct the tage paddle seems cumbersome if the photon-energies in the
data-ntuple's don't match the ones in the table provided. I think I will
just reskim my data to include the tage paddle number, if that is the case.

Mukesh.

On 02/15/2012 01:32 PM, Johann Goetz wrote:
>
> It describes the files and how to interpret them. Currently I only had
> enough statistics to do 481 of the runs. I'm working on getting the
> rest right now. Tomorrow, I intend to address momentum corrections and
> I should have most of the