History: BigBite Optics

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+ !Calibration
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+ Attached are calibration scripts. They require a few parameters to be adjusted and things such as a path to the ROOT files needs to be added, so they will not run on their own. They provide a framework that has been used to do calibrations in the past. There is a number of defined values that are required and can be found in a mwdc_defs.h header. (See ((BigBite Analysis Scripts|BigBite Analysis Scripts)) for a copy)
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+ The vertex calibration is done by allowing just an offset to the applied.
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+ The momentum calibration is done as described above, by allowing all coefficients to vary over the face of the magnet.
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+ The low statistics calibration is done by just allowing the leading coefficient to vary over the face of the magnet. It requires that the rest of the coefficients already have reasonable values and that the fitting in the good central region is already done. It works by creating a histogram of the c0 value that would be necessary to give a momentum identical to pex(theta_e) for each magnet x,y bin and the appropriate c0 value is the value of the maximum bin of that histogram.