Euclid data release Q2: the Euclid Galactic Bulge Survey

Euclid has a number of planned data releases to the world. After the successful “Quick Data Release 1” (Q1, March 2025), ESA and the EC has published a second Quick Data Release (Q2) on 24 June 2026. The Q2 dataset is very different from Q1: the Euclid Galactic Bulge Survey (EGBS). In March 2025 Euclid was pointed close to the Galactic Centre to take images with its VIS camera of 4.8 deg2 over nine adjoining fields. This dataset is an unprecedented deep, wide-field, high-resolution view of the inner bulge region of our Milky Way galaxy. The Q2 release will contain calibrated images as well as photometry and astrometry catalogues of all stars in this field.

The imaging data are obtained in the single VIS broad band over 16 dithered exposures of 400 sec each, giving a total exposure of 1.8 hours per field, at Euclid’s resolution (0.16 arcsec). The background about EGBS science and data access can be found at ESA’s Euclid Q2 release page.

Basic data release information

Fields
Outline of the mosaic of nine Euclid Galactic Bulge Survey pointings (in red) shown on a Gaia image of the Milky Way.
(Image adaptation for Euclid, Credit: J.-C. Cuillandre/ESA/Euclid/Euclid Consortium/NASA; ESA/Gaia/DPAC. License: CC BY-SA 3.0 IGO. The original Gaia image is available here.)
Field NumberRA (deg, J2000)Dec (deg, J2000)
1267.425–30.019
2267.441–29.259
3267.456–28.499
4268.248–28.610
5268.237–29.369
6268.227–30.129
7269.030–30.236
8269.036–29.476
9269.041–28.716
Euclid Galactic Bulge Survey field centres

Q2 publications and data access

Euclid Q2 overview, data products and processing:

Beaulieu et al., 2026, submitted to A&A, “Euclid Quick Data Release (Q2) – The Euclid Galactic Bulge Survey” (PDF version, 9MB)

Data products released
  • VIS calibrated images
  • Astrometry and photometry catalogues for 60 million stars

Data access via sftp or ESA Datalabs.

Data documentation and known issues at the ESA Q2 data relase page.

Visualisation at ESA Sky.

A cutout from the Q2 EGBS Euclid image, showing a stellar cluster in front of the high density of stars of the Milky Way bulge. Credit: ESA/Euclid/Euclid Consortium/NASA, CFHT, image processing by J.-C. Cuillandre and E. Bertin (CEA Paris-Saclay)

Updated: 2026-06-24, KJ

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