Specifications

AUTOSTAR CCD PHOTOMETRY 25
Figure 3-10. Magnitude Determination Window.
8. Click on OK. Do not click on “Log”, as the data will be logged
twice. Just click OK.
9. Repeat Steps 1 - 8 for each Program star you wish to know the
magnitude of.
10. As a double-check and a way to indicate where you are in the
Log file, determine the magnitude of the Comparison star as the
last measurement. It should be the same as what was set earlier for
the Reference magnitude.
Note: To continue with additional images taken with the same
filter, repeat Steps 1 - 8; but you will not need to re-enter the
Reference magnitude value as it is already set (for that filter), so
just click OK for that step. You will need to use the Set Reference
Magnitude with each image, however.
11. When done, you should have data from all the images for the
given filter. You should also have a single text file called
“ImageInfo.” You now can rename the text file. Call it
“V Data.txt” (for the V filter images.)