GalSim-developers / GalSim-developers/GalSim
Centroid shifts from lensing
Nobody has claimed this yet.
- Dominant language
- Python
- Stars
- 272
- Forks
- 121
- PR merge metrics
- No merged PRs in 30d
Description
In addition to shear and convergence/magnification, lensing also moves the positions of objects around. We should have our lensing modules also be able to return a shift that is appropriate for the location of the galaxy. Then the user could apply that as well as the shear and magnification to get the complete lensing effect.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no specific files or tests. Start by locating the lensing modules that currently return shear and convergence/magnification, then determine how a position-dependent centroid shift should be represented and exposed. Done means users can obtain and apply the shift together with the existing lensing effects.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- computer-graphics
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100