LAST MODIFIED BY TS TRONDSEN Thu Jun 20 09:45:45 MDT 2002
The below Calibration results apply to the new, upgraded (H-Beta Class) Polaris imager [installed at Gillam in December of 2001]. Calibration data for the original Polaris imager [apply to March 30, 2000 - May 15, 2001, location Gillam] are located here.
Background-subtracted Low Brightness Source (LBS) measurements were used to calculate the rayleigh sensitivity, R, of the instrument. The resulting "R-values" are as follows.
Intensifier Gain = 0:
Intensifier Gain = 1
Intensifier Gain = 2
Intensifier Gain = 3
NOTES:
1. CCD Gain is at 0 for all calibration data.
2. Calculated values apply to the center of the circular field of view (see separate section on spatial calibration for exact pixel coordinates). Zonal Scan (flat field) image must be applied prior to using these R values at other locations within the field of view (see separate section).
3. The calibration of the LBS itself is dubious at best, the derived R values should thus be used with some caution. In view of the uncertainty as regards the LBS, the errors quoted above for R-values may be considered somewhat meaningless.