LSSTDESC/imSim

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GalSim based Rubin Observatory image simulation package

Stars: 42
Forks: 15
Open beginner issues: 0
Indexed issues: 45
Avg merge: 7h 21m
Merged PRs (30d): 1

Dominant language: Python
License: BSD-3-Clause
Last GitHub push: Aug 28, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

Open All

45 open issues indexed

Mismatch between simulated sky levels for DP2 visits vs measured skylevels Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

LSSTDESC/imSim#519 · Opened Aug 13, 2026
FFT diffraction doesn't include circle sources from the geometry Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

LSSTDESC/imSim#512 · Opened Mar 17, 2026
Incorrect normalization in directed_dist() Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

LSSTDESC/imSim#506 · 6 comments · Opened Feb 2, 2026
Add VINGETTE and VING_MIN to headers Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

LSSTDESC/imSim#501 · 2 comments · Opened Dec 10, 2025
Deprecated installation instructions with mambaforge Open

Difficulty 1/5 Under an hour Newbie friendliness 72/100

LSSTDESC/imSim#486 · 1 comment · Opened May 6, 2025
Add ComCam height maps. Open

enhancement Realism

Difficulty 4/5 3-5 days Newbie friendliness 30/100

LSSTDESC/imSim#483 · Opened Nov 19, 2024
Disambiguate RoTelPos, RotSkyPos, ROTPA etc Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

LSSTDESC/imSim#482 · Opened Nov 19, 2024
artifacts around bright stars Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

LSSTDESC/imSim#481 · 6 comments · Opened Sep 9, 2024
Revisit tree ring amplitudes for LSSTCam simulations Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#474 · 1 comment · Opened May 16, 2024
New WCS type? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#462 · 5 comments · Opened Apr 11, 2024
Apply DCR for faint objects Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

LSSTDESC/imSim#455 · 1 comment · 1 reaction · Opened Mar 21, 2024
feature request: Output image background level and variance Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

LSSTDESC/imSim#442 · 8 comments · Opened Jan 10, 2024
Ops Rehearsal #3 ComCam simulation tracking issue. Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#431 · 2 comments · Opened Oct 27, 2023
Properly deal with bright defocused objects Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

LSSTDESC/imSim#412 · 3 comments · Opened Aug 29, 2023
Make a PSF object type which is a call to a PIFF object Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#404 · 5 comments · Opened Aug 15, 2023
Add skyCatalog test for object position test. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

LSSTDESC/imSim#397 · 1 comment · Opened Aug 3, 2023
Invalidate checkpoint files when config dict changes Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

LSSTDESC/imSim#382 · 1 comment · Opened Jul 20, 2023
Consistent application of vignetting with and without using RubinOptics Open

LSSTDESC/imSim#374 · 2 comments · 1 assignee · Opened Jul 11, 2023
Add sensor fringing induced by atmospheric excitation lines Open

Realism Sensor

LSSTDESC/imSim#362 · 1 assignee · Opened Jun 26, 2023
Correctly apply relevant effects to specific sensor types Open

Realism Sensor

Difficulty 4/5 3-5 days Newbie friendliness 30/100

LSSTDESC/imSim#354 · 2 comments · Opened Jun 9, 2023
Enable instance catalogs and skyCatalogs to be used together Open

enhancement New Feature

Difficulty 4/5 3-5 days Newbie friendliness 35/100

LSSTDESC/imSim#286 · Opened Aug 18, 2022
Simulate the AuxTel Open

enhancement Optics Model

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#271 · 2 comments · Opened Apr 28, 2022
Re-orient parallelization strategy. Open

Redesign

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#244 · Opened Apr 8, 2020
Simulate the CBP Open

help wanted New Feature Optics Model

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#210 · 3 comments · Opened Feb 13, 2019
Add option to write extended truth information. Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#208 · 1 comment · Opened Feb 13, 2019
Model sensor-to-sensor QE and PNRU variation Open

Realism Sensor

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#207 · 1 comment · Opened Feb 13, 2019
Add noise and x-talk values with variation to obs_lsst based on as measured values. Open

Realism Sensor

LSSTDESC/imSim#206 · 3 comments · 1 assignee · Opened Feb 12, 2019
Add satellites / other sky artifacts Open

Realism

LSSTDESC/imSim#205 · 8 comments · 2 assignees · Opened Feb 12, 2019
Add intra-cluster light Open

Realism

Difficulty 5/5 Over a week Newbie friendliness 15/100

LSSTDESC/imSim#204 · Opened Feb 12, 2019
Work with experts to identify lack of realism in the sky images Open

Realism

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#203 · 1 comment · Opened Feb 12, 2019
Synthesize sensor defects from I&T data and create associated masks for DM. Open

Realism Sensor

LSSTDESC/imSim#202 · 6 comments · 1 assignee · Opened Feb 4, 2019
Model and document sensor and electronics-chain readout non-linearities Open

Realism Sensor

LSSTDESC/imSim#169 · 4 comments · 1 assignee · Opened Sep 19, 2018
Add edge effects to sensor model Open

Realism Sensor

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#168 · Opened Sep 19, 2018
Request switch to Earth based coordinate system for lensing conventions. Open

Difficulty 5/5 Over a week Newbie friendliness 18/100

LSSTDESC/imSim#138 · 23 comments · Opened Aug 17, 2018
Add galactic cirrus to images Open

New Feature Realism

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#135 · Opened Aug 15, 2018
Add an input mode for galaxies that are produced by generative models. Open

New Feature Realism

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#134 · Opened Aug 15, 2018
Build a parameterized optical model with Batoid to use for fast simulations. Open

Discussion Optics Model Redesign

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#122 · 2 comments · Opened Jul 19, 2018
Add a "layering" mode to allow users to add objects to already simulated fields. Open

enhancement New Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#109 · 5 comments · Opened Apr 21, 2018
Add surface effects like Annealing/Bamboo Patterns as GalSim surface operations Open

Realism Sensor

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#108 · 13 comments · Opened Apr 12, 2018
Enhance sky glow and other sky structure in the ESO model. Open

Realism

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#82 · 3 comments · Opened Nov 28, 2017
Add an option for a new flexible binary instance catalog Open

Redesign

Difficulty 5/5 Over a week Newbie friendliness 18/100

LSSTDESC/imSim#71 · 9 comments · Opened Oct 22, 2017
Explore the possibility to store or encode the ability to recreate the PSF for each object Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#58 · 10 comments · Opened May 16, 2017
Consider a consistent use of units throughout the program. Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

LSSTDESC/imSim#48 · 4 comments · Opened Jan 13, 2017
Add capability for specifying clouds Open

help wanted Realism

Difficulty 5/5 Over a week Newbie friendliness 20/100

LSSTDESC/imSim#12 · 6 comments · Opened Oct 19, 2016
Integrate Batoid for optical raytracing Open

Optics Model Redesign

LSSTDESC/imSim#10 · 7 comments · 1 assignee · Opened Oct 18, 2016

LSSTDESC/imSim

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