This page provides public access to the first data release of the LoTSS Deep Fields. These are deep LOFAR pointings in three well-studied extragalactic fields: Elais-N1 (16:11:00 +55:00:00), Lockman Hole (10:47:00 +58:05:00), and Boötes (14:32:00 +34:30:00), together with the Euclid Deep Field North (EDFN: 17:58:55 +66:01:12). Each pointing covers around 20 square degrees, reaching rms depths in the central regions beween 20 and 35 μJy/beam at central frequencies at or near 144 MHz (check papers for details). The data release also includes multi-wavelength data over the central sky areas, together with source-associated and cross-matched catalogues over the central ~10 square degree region of each field with the highest quality multi-wavelength data. The radio datasets for Bootes and Lockman are described by Tasse et al. (2021) and Elais-N1 is described by Sabater et al. (2021). The multi-wavelength data, source association and cross-matching are described by Kondapally et al. (2021), with corresponding photometric redshifts described by Duncan et al. (2021). Finally, the observations of the EDFN are described by Bondi et al (2023).

In addition you can also find here the first release of a deep LBA observation of the Boötes field (Williams et al 2021). The final 15 arcsec resolution image, made from 56 hrs of observations, achieves an rms of 0.65 mJy/beam in the central region, and <1.2 mJy/beam over 50 per cent of the map. The source catalogue contains 1,948 sources detected over an area of 23.6 square degrees. The 829 sources within the deep optical coverage area are matched to the HBA catalogue at 144 MHz.

Further derived data will be made here as follow-up papers are published.

From this page you may follow links to:

• Press release details, supplementary images and video
• Data and catalogues for Elais-N1
• Data and catalogues for Lockman Hole
• Data and catalogues for Boötes
• Data and catalogues for EDFN
• Astronomy & Astrophysics special issue on the Deep Fields
• Data and catalogues for the Boötes LBA survey
• Catalogue and README file for the deep-fields AGN classified by Mingo et al 2022.
• Credits for the LoTSS survey

If you make any scientific use of the publicly available data linked here, we kindly request that you include the following acknowledgement:

LOFAR data products were provided by the LOFAR Surveys Key Science project (LSKSP; https://lofar-surveys.org/) and were derived from observations with the International LOFAR Telescope (ILT). LOFAR (van Haarlem et al. 2013) is the Low Frequency Array designed and constructed by ASTRON. It has observing, data processing, and data storage facilities in several countries, which are owned by various parties (each with their own funding sources), and which are collectively operated by the ILT foundation under a joint scientific policy. The efforts of the LSKSP have benefited from funding from the European Research Council, NOVA, NWO, CNRS-INSU, the SURF Co-operative, the UK Science and Technology Funding Council and the Jülich Supercomputing Centre.