This is the release site for the Pre-launch Euclid Cosmic Dawn Survey catalogues.
For Euclid Consortium Members, see https://dawn.calet.org/q1/ for updated Q1 catalogues. Contact John Weaver (john.weaver.astro@gmail.com) for login instructions. Pending further testing, they will be publicly available in Fall 2025.
The DAWN survey PL includes photometric catalogues of ground-based UV/optical imaging from CFHT Megacam (u-band) and Subaru HSC (griz) paired with deep Spitzer/IRAC 3.6 and 4.5 micron data. No Euclid data is included in this release.
This release is available for public use.
Sources are detected on a weighted stack of the HSC r+i+z images. Further included are quantities from SED fitting including photometric redshifts, stellar masses, and goodness of fit statistics for stellar and AGN templates. Two catalogues are released: one for Euclid Deep Field North (EDF-N) spanning 16.9 deg², and one for Euclid Deep Field Fornax (EDF-F) spanning 2.9 deg².
The Cosmic Dawn Survey is a key project of the Euclid Mission, as described in McPartland et al. (2025). These catalogues are described by Zalesky et al. (2025), which broadly follows COSMOS2020 (Weaver et al. 2022) using The Farmer (Weaver et al. 2023). The ground-based imaging is provided by the Hawaii Twenty Square Degree Survey. Please refer to our acknowledgements for proper citation of the data products.
See dawn.ipac.caltech.edu and cosmos.esa.int/web/euclid for more details.
Detailed descriptions and recommended usage of these data products are described in the .header file.
| Filename | Description |
|---|---|
| DAWN_EDFN_PL_Aug11.fits | Photometric catalogue with photo-z and galaxy properties, EDF-N |
| DAWN_EDFF_PL_Aug11.fits | Photometric catalogue with photo-z and galaxy properties, EDF-F |
| DAWN_EDFN+F_PL.header | Header description file for the EDF-N and EDF-F catalogues |
Name Last modified Size
DAWN_EDFF_PL_Aug11.fits 2025-03-31 13:05 970M
DAWN_EDFN+F_PL.header 2025-03-31 13:08 9.9K
Zalesky2025.pdf 2025-03-31 13:12 10M