Star & PSF measurement quality

Open

#792 opened on Jul 6, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 5/5
Estimated time: Over a week
Newbie friendliness: 25/100

Issue type: Feature
Clarity: Needs clarification
Activity status: Quiet
Tech stack: python
Domain: computer-vision

Research direction

Review sub-issues #769, #775, #662, and #585 to understand the separate measurement-quality problems, and compare them with the verification-test scope in #765. Done means determining and addressing the relevant star/PSF quality work without conflating these threads.

Written by the indexing model from the issue text.

Description

Umbrella issue collecting star/PSF measurement-quality threads — as opposed to the star verification tests grouped under #765.

Sub-issues:

#769 — ngmix reduced-χ² anomaly on stars (error model)
#775 — HSM: measure PSF/star shapes directly in sky coords, drop the WCS re-transform
#662 — bright-star mask sizes
#585 — setools star-catalogue diagnostics

— Claude (Fable) on behalf of Cail

Dominant language: Python
Stars: 18
Forks: 14
Avg merge: 8h 40m
Merged PRs (30d): 10

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