Remove Pupil Ghost using IRAF rmpupil

In summary, a pupil ghost is a fixed feature that can be removed using the rmpupil command in IRAF. This can be found in the "New Mosaic Reduction Capabilities" section of the IRAF website and can be further researched through a Google search.
  • #1
abbeynewton
31
0
Hi. My name is abi. I was wondering if anyone knew how to remove pupil ghost from images using the rmpupil command in IRAF.
 
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  • #2
abbeyNewton said:
Hi. My name is abi. I was wondering if anyone knew how to remove pupil ghost from images using the rmpupil command in IRAF.

Google search and google image search, "IRAF data reduction remove pupil ghost rmpupil command",

https://www.google.com/search?q=IRA...+remove+pupil+ghost++rmpupil+command&safe=off

https://www.google.com/search?safe=... reduction remove pupil ghost rmpupil command

See in "New Mosaic Reduction Capabilities", section, "Removing pupil patterns: RMPUPIL"

http://iraf.noao.edu/projects/mosaic/objmasks/objmasks.html#rmpupil

The above is old, hope this helps? What is a pupil ghost?
 
  • #3
Thanks. A pupil ghost is a fixed feature that comes from multiple reflections of the diffuse background from the sky or the telescope pupil. It is seen in flat images when doing photometry
 

Related to Remove Pupil Ghost using IRAF rmpupil

1. What is IRAF rmpupil?

IRAF rmpupil is a task in the Image Reduction and Analysis Facility (IRAF) software used for removing pupil ghosts in astronomical images. It is specifically designed for reducing the effects of light scattered by the telescope's optics, which can create ghost images of the telescope's pupil in the final image.

2. How does IRAF rmpupil work?

IRAF rmpupil works by using a model of the telescope's pupil to identify and remove any ghost images in the final image. It uses a combination of Fourier transforms and image subtraction techniques to accurately remove the scattered light.

3. What types of images can be processed with IRAF rmpupil?

IRAF rmpupil is designed specifically for processing astronomical images, particularly those taken with telescopes that have a large aperture and long focal length. It is also useful for images taken with adaptive optics systems, which can create complex pupil ghosts.

4. Is IRAF rmpupil easy to use?

IRAF rmpupil can be somewhat complex to use, as it requires knowledge of IRAF and understanding of the telescope's optical system. However, there are many tutorials and guides available online to help users effectively use the task for their specific images.

5. Are there alternative methods for removing pupil ghosts?

Yes, there are alternative methods for removing pupil ghosts, such as using specialized software or manually editing the images. However, IRAF rmpupil is a widely used and reliable tool for this task and is recommended for its accuracy and efficiency.

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