SHIPsphotLinks

Purpose of this page:

• Provide all the references we need to perform photometry and related topics

Photometry Reference

• Aperture Photometry Overview (from Luisa Rebull).
• Summary of Aperture photometry steps (taken from above Overview).
  • Once you have calibrated data (ground- or space-based), the basic series of steps for doing aperture photometry are as follows, with many different options and parameters for each step:

1. Detect objects in image, if doing this automatically (human eyes are good at this).
2. Determine center of object.
3. Determine background -- e.g. determine what the signal would be in the aperture if the star was not there. (Usually means defining an annulus around the object at some distance from it.)
4. Summing up the light in the object (define the size of the aperture to use, subtracting off the background).
5. Apply aperture corrections, if necessary.
6. Check your numbers!

Photometry Tools

NITARP's own vintage.

APT: Aperture Photometry Tool

www.aperturephotometry.org

Using APT

Youtube Tutorial (by Luisa Rebul)