# Rubin Science Assembly, Thu Oct 16 2025: Astrometry and the WCS

**URL:** <https://www.rubin.community/t/rubin-science-assembly-thu-oct-16-2025-astrometry-and-the-wcs/11091>\
**Category:** Science\
**Tags:** announcements\
**Created:** [October 10, 2025, 5:48pm UTC](https://www.rubin.community/t/rubin-science-assembly-thu-oct-16-2025-astrometry-and-the-wcs/11091 "2025-10-10T17:48:00Z")\
**Posts on this page:** 1\
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**Author:** ![plazas](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/plazas/32/867_2.png) [@plazas](https://www.rubin.community/u/plazas)\
**Post date:** [October 17, 2025, 1:27pm UTC](https://www.rubin.community/t/rubin-science-assembly-thu-oct-16-2025-astrometry-and-the-wcs/11091/2 "2025-10-17T13:27:05Z")

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Slides: [Rubin Science Assembly: Astrometry in DP1](https://docs.google.com/presentation/d/1NJyH0XLjh7mPdJ8vB0AwMeHEqnQnt4KpW0r87gKKAkw/edit?slide=id.g32c1fed2b97_0_148#slide=id.g32c1fed2b97_0_148)

Recording:

[![](https://img.youtube.com/vi/OsjxN7PfiYk/maxresdefault.jpg "Rubin Science Assembly, 10 16 2025: Astrometry and WCS in DP1") ](https://www.youtube.com/watch?v=OsjxN7PfiYk)

References from the slides:

- [Data Management Technical Note - 266: Astrometric Calibration in the LSST Pipeline](https://dmtn-266.lsst.io/DMTN-266.pdf) (by Clare Saunders, Princeton)
- [PSTN-019: The LSST Science Pipelines Software: Optical Survey Pipeline Reduction and Analysis Environment](https://pstn-019.lsst.io/)
- [RTN-095: The Vera C. Rubin Observatory Data Preview 1](https://rtn-095.lsst.io/)
- [DMTN-277: The monster Reference Catalog](https://dmtn-277.lsst.io/) (Ferguson et al 2025)
- [AST: A library for modeling and manipulating coordinate systems](https://ui.adsabs.harvard.edu/abs/2016A%26C....15...33B/abstract)
- [Astrometric Calibration and Performance of the Dark Energy Camera](https://ui.adsabs.harvard.edu/abs/2017PASP..129g4503B/abstract)
- [DMTN-010: WCS and Distortion Requirements and Existing Options](https://dmtn-010.lsst.io/)
- [Known issues and subtleties DP1 documentation](https://dp1.lsst.io/products/known_issues_and_subtleties.html#wcs-fits-approximations-and-misleading-interfaces)
- [How to use the WCS in DP1](http://www.rubin.community/t/how-to-use-wcss-in-dp1-and-commissioning-processing/10769)(Community Forum post by Jim Bosch, Princeton)

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