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User name mercado
Log entry time 16:13:01 on April10,2010
Entry number 316813
keyword=Detector vs BCM fit - pedestal error?
Shown below are fits of detector signal versus BCM1.
Extrapolating the fits to the y-axis, we can get an error for the pedestal.
For each detector, the Y-intercept is:
det1: 6250
det2: 6321
det3: 5897
det4: 6397
These values correspond to errors in the pedestal of:
det1: 6.9%
det2: 6.9%
det3: 6.5%
det4: 7.0%
The consistency of these errors indicates a pedestal error.
So, assuming the detectors are linear to within 2%, we could use them to
calibrate the BCM pedestals more accurately.
FIGURE 1