PhotoRed (Photometric Reductions)
AAVSO Batch Processing Compatible with revised AAVSO
CCD Reporting Format
Measuring
images in PhotoRed is very similar to the process in Canopus. The main difference is that
you’re not doing astrometry and the Magnitude/Intensity Relationship is not computed
or used. What is similar is that you are telling PhotoRed which star on an image matches
one in a catalog (that was plotted on the chart) and PhotoRed then stores information
about that star. The data includes the air mass, instrumental magnitude, catalog
magnitudes, and filter. The various routines of PhotoRed use the data to compute
extinction and transform values and to convert instrumental magnitudes to standard
magnitudes.
The
observations data list, on the Reductions Page
(shown above), displays all the data that can be used in the various reduction routines.
You can group observations in several ways and sort the data within the groupings by the
entries in several columns. You can also change the USE status flag for one or more
observations at a time, as well as the group number and filter, and delete one or more
observations from the list entirely. |
