James Chiang

distinction between galaxy position angle and beta

4

I wanted to note a possible inconsistency regarding the galaxy ellipticity components and galaxy position angles described in the [current schema](https://github.com/LSSTDESC/gcr-catalogs/blob/10b9cce2b564cb8d8c27c613fd8098373319b07c/GCRCatalogs/SCHEMA.md). @rmjarvis describes in [slack](https://lsstc.slack.com/archives/CHXKSF3HC/p1670190337342839) a distinction between `beta` and...

Revisit tree ring amplitudes for LSSTCam simulations

1

For the initial OR3 simulations, there were a lot of concerns regarding the strength of the tree rings appearing in the first round of ComCamSim images, so we reduced tree...

Add missing keywords to raw FITS headers

9

For the ops-rehearsal-3 activities, a number of keywords describing the observations were noted as missing, specifically the `null` ones in this list (see the post in [slack](https://lsstc.slack.com/archives/C064M4D6RC4/p1711141950027439)): ``` RA: 124.82881462031425...

The Rubin team would like a different instrument model to be used for simulated LSSTCam data. Some discussion [here](https://rubinobs.atlassian.net/browse/RFC-902). The plan is to implement a `LsstCamSim` instrument model in obs_lsst...

Consistent application of vignetting with and without using RubinOptics

2

At #368 , Josh asks: > * Should we require `input.vignetting` if using a `RubinOptics` photon op? > * What happens if `input.vignetting` is populated and we're photon-shooting without `RubinOptics`?...

For generating "standard" scenes, using the stars, galaxies, etc. from skyCatalogs is preferred. However, users may wish to include custom objects in their simulations, and for that purpose, instance catalogs...