Specifications

20 AUTOSTAR CCD PHOTOMETRY
6. A Calibrate window will be displayed (Fig. 3-4) where you can
select and include a Bias, Dark Frame, and a Flat field image. If
you have used the Auto Dark Subtraction option while taking
images, or if the exposure time is less than 1 second, you do not
need to use another dark frame. If you have used a dark frame
when taking the images, the Bias image is not needed.
Figure 3-4. Calibrate Window.
Note: This will create a new file called NewImageGroup.lst. Do
not move or rename this file. This is not a text file and cannot be
opened. Just let it be, as it defines the Calibration for the files in
the Group.
7. Select the Flat Field you wish to use to calibrate with (e.g.,
click on Select Flat Field and find the flat field for the filter used
for the images to be calibrated – for instance, FV for the V filter
images). Click the Include Flat Field box, and if desired the
Include Bias button (after selecting the Bias image). Remember
that the Dark Frames have already been used on the fly when the
images were exposed (if the Auto Dark Subtract option was
selected). Also, the Bias Frame data is included as part of the
Dark Frame. Click on OK.
8. The program will now automatically calibrate all the images and
save the newly-calibrated images with new names (e.g.,
Calibrated_"file name"). The original (uncalibrated) images will
be left untouched. (See Fig. 3-5.)