ERO Public Data Release

Welcome to the data access page for the Euclid Early Release Observations (EROs). This release contains the images and source catalogues. The release notes for the ERO Public Data Release can be found on the COSMOS pages here. The data files for the EROs can be found through the links below.

ERO-02: A first glance at free-floating baby Jupiters with Euclid

E. Martín (Instituto de Astrofísica de Canarias)

ERO-03: Euclid view of Milky Way globular clusters

D. Massari (INAF OAS, Bologna)

ERO-08: A Euclid showcase of nearby galaxies

L. Hunt (INAF-AO Arcetri, Firenze)

ERO-09: The Fornax galaxy cluster seen with Euclid

A. Lançon (Observatoire de Strasbourg)

ERO-10: Cluster of Galaxies

J.-C. Cuillandre (CEA, AIM, Université Paris-Saclay)

ERO-11: A Glimpse Into Euclid's Universe Through a Giant Magnifying Lens

H. Atek (Institut d’Astrophysique de Paris)

Data

The data reduction for the EROs is described in the paper "Euclid: Early Release Observations -- Programme overview and pipeline for compact- and diffuse-emission photometry" (Cuillandre et al, 2024, submitted to A&A). A pre-print version of the paper is available here. The user is recommended to consult this paper in case of questions concerning these datasets.

Each ERO target has associated image stacks and catalogues, described below.

Images

The collection of image stacks from the VIS and NISP instrument are packaged in the following files, for a given ERO field 'TARGET':

  • Euclid-VIS-Stack-[TARGET].DR3.tar
  • Euclid-NISP-Stack-[TARGET].DR3.tar

The tar packages contain the following files:

Compact source stack Extended emission stack
VIS
  • Euclid-VIS-[TARGET]-Flattened.DR3.fits.gz - image
  • Euclid-VIS-[TARGET]-Flattened.DR3.weight.fits.gz - weight map
  • Euclid-VIS-[TARGET]-LSB.DR3.fits.gz - image
  • Euclid-VIS-Mask-[TARGET]-LSB.DR3.fits.gz - mask
NISP
[BAND] in {Y,J,H}
  • Euclid-NISP-[BAND]-[TARGET]-Flattened.DR3.fits.gz - image
  • Euclid-NISP-[BAND]-[TARGET]-Flattened.DR3.weight.fits.gz - weight map
  • Euclid-NISP-Chi2-[TARGET]-Flattened.DR3.fits.gz - detection image
  • Euclid-NISP-[BAND]-[TARGET]-LSB.DR3.fits.gz - image
  • Euclid-NISP-Mask-[TARGET]-LSB.DR3.fits.gz - mask
Reference Cuillandre et al 2024, section 6.1 Cuillandre et al 2024, section 6.2

Catalogs

Source catalogs have generated from VIS and NISP images using SourceExtractor and PSFex (see Cuillandre et al 2024, section 8). Please refer to the relevant software documentation for definition of the catalog files. The tar packages are:

  • Euclid-VIS-Catalog-[TARGET].DR3.tar
  • Euclid-NISP-Catalog-[TARGET].DR3.tar

The catalogs are provided in ASCII format but can be quickly converted to a FITS table with the provided Python script (convert2fits.py).

Support

Please use the following support services, in case of problems or questions:

Advisories

DR-01 (2024-05-23)

The aperture magnitudes in the NISP Y-band Barnard30 catalog have an erroneous value of 99.00.

DR-02 (2024-05-23)

HolmbergII contains uncorrected stray light in the Extended emission stack.