Euclid Q1 data were publicly released on March 19, 2025, by the ESA Euclid science archive as well as the complementary archive at the NASA/IPAC Infrared Science Archive (IRSA). The main component of the Q1 data contain Level 2 data of a single visit (at the depth of the Euclid Wide Survey) over the Euclid Deep Fields (EDFs): 20 deg2 of the EDF North, 10 deg2 of EDF Fornax, and 23 deg2 of the EDF South. The deep fields will be visited multiple times during the mission. ESA memo EUCL-EST-ME-8-018 specifies the scope, content, and data product definition of Q1, and extends the content of the two previous ESA memos, EUCL-EST-ME-8-007 and EUCL-EST-ME-8-014.
ENSCI will host an online tutorial on Euclid Q1 data on April 4th, 10 am to noon Pacific time, on Zoom. The webinar will include an introduction to Q1 data products, a brief tour of the Q1 data archive at IRSA, walkthrough of python notebooks demonstrating how to access and explore a range of Euclid data, and plenty of time for questions. Click here to register for the webinar.
Click here for frequently asked questions about Euclid Q1 data. If you have other questions, submit a ticket to ENSCI Help Desk following the instructions here.
References:
EUCL-EST-ME-8-018, EST memo: Q1 fields definition, detailed list of expected Q1 products, 2024-09-30
EUCL-EST-ME-8-007, EST Memo: Q1: Euclid's first public data release - scope and content, 2022-10-06
EUCL-EST-ME-8-014, EST Memo: Product definition for the Q1 data release, the list of SGS Q1 data release products as recommended by the Euclid Science Team (EST), 2023-08-14
Q1 data papers from the Euclid Consortium
Euclid Key References (curated by ENSCI)