This page will host the deep fields second data release, consisting of full-depth 6′′ images of the LoTSS deep fields (ELAIS-N1, Lockman Hole, Boötes and the Euclid Deep Field North). Currently only the ELAIS-N1 field is here.

ELAIS-N1

ELAIS-N1 images are described by Shimwell et al (2025). The abstract is below:

We present the final 6′′ resolution data release of the ELAIS-N1 field from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey Deep Fields project (LoTSS Deep). The 144 MHz images are the most sensitive achieved to date at this frequency and were created from 290 TB of data obtained from 505 hrs on-source observations taken over 7.5 years. The data were processed following the strategies developed for previous LoTSS and LoTSS Deep data releases. The resulting images span 24.53 square degrees and, using a refined source detection approach, we identified 154,952 radio sources formed from 182,184 Gaussian components within this area. The maps reach a noise level of 10.7 μJy beam−1 at 6′′ resolution where approximately half of the noise is due to source confusion. In about 7.4% of the image our limited dynamic range around bright sources results in a further > 5% increase in the noise. The images have a flux density scale accuracy of about 9% and the standard deviation of offsets between our source positions and those from Pan-STARRS is 0.2′′ in RA and Dec for high significance detections. We searched individual epoch images for variable sources, identifying 39 objects with considerable variation. We also searched for circularly polarised sources achieving three detections of previously known emitters (two stars and one pulsar) whilst constraining the typical polarisation fraction plus leakage to be less than 0.045%.

ELAIS-N1 downloads

• Catalogue description (PDF)
• Apparent flux image
• Primary beam-corrected image
• Image of primary beam
• PyBDSF source catalogue
• PyBDSF Gaussian catalogue
• PyBDSF rms map
• PyBDSF model
• PyBDSF residuals
• Catalogue of compact sources with variability parameters

ELAIS-N1 individual epoch images