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Construction Project Status webpage: update on milestones, made automatically by project systems on a monthly basis, but with some latency
Releases of Rubin Observatory Plans for an Early Science Program (RTN-011): the definitive reference for the Data Previews and Data Release 1, but is only updated periodically.
Presentations - e.g. at the LSST@Europe6 conference, presentations from which are also available (in citable form) from Zenodo.
Community forum updates on commissioning - was updated weekly during ComCam on-sky observing late 2024.
Details of the scientifically useful data obtained with ComCam, and that will form Data Preview 1 (see below) are provided in https://sitcomtn-149.lsst.io/. It is quite long and technical, however it contains useful information about which fields were observed, and gives an idea of likely depth and data quality to expect in Data Preview 1.
The Construction Project Status page linked above presents a timeline for key events in final stages of the construction project, including the anticipated date of System First Light (also referred to as Rubin First Light) as no sooner than 04-Jul-2025, beginning of Science Verification observations no sooner than 15-Aug-2025, and Operations Readiness Review no sooner than 18-Sep-2025. These dates are as per the Construction Project Status update on December 10, 2024 update.
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