Difference between revisions of "SHIPsphotLinks"
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Purpose of this page: | Purpose of this page: | ||
* Provide all the references we need to perform photometry and related topics | * Provide all the references we need to perform photometry and related topics | ||
| + | |||
==Photometry Reference== | ==Photometry Reference== | ||
* [http://coolwiki.ipac.caltech.edu/index.php/I%27m_ready_to_go_on_to_a_more_advanced_discussion_of_photometry Aperture Photometry Overview] (from Luisa Rebull). | * [http://coolwiki.ipac.caltech.edu/index.php/I%27m_ready_to_go_on_to_a_more_advanced_discussion_of_photometry 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: | ||
| + | #Detect objects in image, if doing this automatically (human eyes are good at this). | ||
| + | #Determine center of object. | ||
| + | #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.) | ||
| + | #Summing up the light in the object (define the size of the aperture to use, subtracting off the background). | ||
| + | #Apply aperture corrections, if necessary. | ||
| + | #Check your numbers! | ||
| + | |||
==Photometry Tools== | ==Photometry Tools== | ||
Revision as of 20:16, 1 May 2013
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:
- Detect objects in image, if doing this automatically (human eyes are good at this).
- Determine center of object.
- 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.)
- Summing up the light in the object (define the size of the aperture to use, subtracting off the background).
- Apply aperture corrections, if necessary.
- Check your numbers!
Photometry Tools
NITARP's own vintage.
