COSMOS-Web Data Release 1.0:
Complete NIRCam and MIRI Mosaics plus COSMOS-Web Catalog
We are excited to announce the public release of the full COSMOS-Web program, including the complete NIRCam and MIRI imaging as well as the full photometric catalog with photometry, physical parameters, and morphological parameters. Within the release, you will find a single i2d files per filter per tile for each instrument, as well as the separate SCI, ERR, and WHT extensions available as individual files. All of the MIRI visits are also available as single files. The NIRCam and MIRI mosaics are all available at 30 and 60mas. The details of the imaging, data reduction, and data products are available for NIRCam (Franco et al. 2025) and MIRI (Harish et al. 2025).
The photometric catalog was consructed using SE++ and includes the JWST, HST, Spitzer, and ground-based photometry, along with physical parameters, and morphological parameters. For full details, see Shuntov et al. 2025.
To access the full data release directly, visit this link: https://cosmos2025.iap.fr/
Please see the associated README files describing the data reduction steps and a detailed desription of the catalog.
If you have any questions, please contact the program PIs: Jeyhan Kartaltepe (jeyhan at astro dot rit dot edu) and Caitlin Casey (cmcasey at ucsb dot edu), the NIRCam/MIRI Data reduction leads: Maximilien Franco (maximilien.franco at cea dot fr) and Santosh Harish (sxhsps at rit dot edu), or the catalog lead: Marko Shuntov (marko.shuntov at nbi dot ku dot dk).
This work used the CANDIDE computer system at the Institut d’Astrophysique de Paris, which was funded through grants from the PNCG, CNES, DIM-ACAV, and the Cosmic Dawn Center and maintained by S. Rouberol.
COSMOS-Web NIRCam mosaic (upper left) with zoom-ins to the region surrounding the COSMOS-Web Ring (Mercier et al. 2024, Shuntov et al. 2025a).
COSMOS-Web Data Release 0.5:
Epoch 1+2 (January+April 2023) NIRCam and MIRI Mosaics
We are pleased to announce the public release of the second epoch of COSMOS-Web imaging. These data were taken 2024 April-May as separate, contiguous pointings and have been stitched together into mosaic tiles. A re-reduction of the January 2023 data is also included within this release, superseding DR0.2. Within the release, you will find a single i2d files per filter per tile for each instrument, as well as the separate SCI, ERR, and WHT extensions available as individual files. All of the MIRI visits are also available as single files. The NIRCam and MIRI mosaics are all available at 30 and 60mas.
To access the full data release directly, visit this link: https://exchg.calet.org/cosmosweb-public/DR0.5/
Please see the associated README files describing the data reduction steps.
If you have any questions, please contact the program PIs: Jeyhan Kartaltepe (jeyhan at astro dot rit dot edu) and Caitlin Casey (cmcasey at utexas dot edu) or the NIRCam/MIRI Data reduction leads: Maximilien Franco (maximilien.franco at austin dot utexas dot edu) and Santosh Harish (sxhsps at rit dot edu).
This work used the CANDIDE computer system at the Institut d’Astrophysique de Paris, which was funded through grants from the PNCG, CNES, DIM-ACAV, and the Cosmic Dawn Center and maintained by S. Rouberol.
COSMOS-Web Data Release 0.2:
Epoch 1 (January 2023) NIRCam and MIRI Mosaics
We are pleased to announce the public release of the first epoch of COSMOS-Web imaging. These data were taken 2023 January 5-6 as 6 separate, contiguous pointings and have been stitched together into a single mosaic covering 77 sq. arcmin. Within the release, you will find a single i2d file per filter in a single tar.gz file for each instrument, as well as the separate SCI, ERR, and WHT extensions available as individual files. The NIRCam mosaics (F115W, F150W, F277W, F444W) are available at 30 and 60mas and the MIRI F770W mosaic at 60 and 90mas.
To access the full data release directly, visit this link: https://exchg.calet.org/cosmosweb-public/DR0.2/
Please see the associated README files describing the data reduction steps.
If you have any questions, please contact the program PIs: Jeyhan Kartaltepe (jeyhan at astro dot rit dot edu) and Caitlin Casey (cmcasey at utexas dot edu) or the NIRCam/MIRI Data reduction leads: Maximilien Franco (maximilien.franco at austin dot utexas dot edu) and Santosh Harish (sxhsps at rit dot edu).
This work used the CANDIDE computer system at the Institut d’Astrophysique de Paris, which was funded through grants from the PNCG, CNES, DIM-ACAV, and the Cosmic Dawn Center and maintained by S. Rouberol.
