[Brahms-dev-l] DC calibration

I committed DC calibration for the entire p+p (RUN III).
I also committed some important updates to DC tracking code and
tag BRAT with the new revision number, now it is 2.12.13.
I suggest to install this new brat version for the new local tracking.
There are two important updates:
1. Calib. params of Td1 are retrieved from the db.
2. Added new option that allows to do the the fit to the residuals by 
applying the
individual plane position resolution.  This was tested - the new option
provides a better matching between tracks, but the improvement is not 
very dramatic.
The disadvantage is that the resolutions are hardcoded and we don't have 
db entries
for them. However, the relative plane resolutions don't change very much 
from run to run and
I thing that the  hardcoded values are relevant to the entire p+p data set.
To enable this option one should add: dctrack->UsePlaneRes(kTRUE) in the
dc tracking setup.

Note, that it is important to use Td1 reference for pp data. To apply this,
one should add: dctrack->UseTd1Ref(kTRUE).

Right now, I'm working on d+Au. For d+Au one should be very careful with 
the DCs, specially with T3 which
was not so stable during d+Au due to the high background.

Will keep you informed about the progress.

Regards Pawel.


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