We have our own Roman HLIS Cosmology PIT GitHub organisation, which hosts the code libraries that are being developed as part of this effort, as well as eventually production code repositories calculating results. Please visit the link in this sentence to learn more!

Note that the High Latitude Imaging Survey Science Investigation Team (SIT) GitHub organisation contains software developed under an earlier incarnation - the Science Investigation Team or SIT.

Over the full survey, the PIT plans to provide a broad suite of products, including:

• IMCOM-based images in each Roman photometric band, together with ancillary products such as correlated-noise realizations

• Galaxy catalogs containing Roman photometry, Rubin forced photometry, weak-lensing shape measurements, shear estimates, photometric redshift estimates, and associated uncertainties
• Galaxy-cluster catalogs
• Summary statistics, including shear-shear, galaxy-shear, galaxy-galaxy, and cluster-galaxy correlation functions and angular power spectra
• Ancillary analysis products such as estimated redshift distributions, survey masks, and related calibration products
• Cosmological parameter inference pipelines that enable the community to test cosmological models using these measurements

The first Year 1 releases are intended as early milestones toward this full product suite and are currently planned in two phases.

The Early Data Release (EDR)

The Early Data Release (EDR) is currently planned to be based on HLWAS observations obtained through July 2027 and is expected to include the COSMOS deep field in F106, F129, and F158. Because of its early timeline, the EDR is expected to include only a limited subset of the eventual HLIS PIT products, prioritizing those most useful for early scientific exploration and pipeline validation. The current target release date is around January 2028.

First Data Release (DR1)

Data Release 1 (DR1) will extend this initial release to a larger Year 1 deep-tier data set, including complete seven-band coverage of COSMOS and XMM-LSS, based on observations obtained through February 2028. DR1 is expected to provide a broader and more mature set of products than the EDR, although it may still not represent the full final product suite planned for the survey. The current target release date is around September 2028.

These early releases are designed both to support early community science and to help identify areas where the analysis pipelines, calibrations, and validation procedures can be improved before later survey-wide releases.

For further details, see the Roman Space Telescope Project Infrastructure Teams Data Products User Documentation.

Science publications from the High Latitude Imaging Survey Cosmology Project Infrastructure Team will be listed here.

For now, check out our growing research publications on the ADS library.