The LOFAR LBA Sky Survey II. First data release
F. de Gasperin, H. W. Edler, W. L. Williams, J. R. Callingham, B., Asabere, M. Bruggen, G. Brunetti, T. J. Dijkema, M. J. Hardcastle, M., Iacobelli, A. Offringa, M. J. Norden, H. J. A. Rottgering, T. Shimwell, R. J., van Weeren, C. Tasse, D. J. Bomans, A. Bonafede, A. Botteon

TL;DR
This paper presents the first data release of the LOFAR LBA Sky Survey, demonstrating high-resolution, sensitive low-frequency radio observations of the northern sky, with extensive data products and improved calibration techniques.
Contribution
It introduces a new wide-area low-frequency survey with LOFAR, including an automated data reduction pipeline and the first public data release with source catalogues.
Findings
Achieved a typical sensitivity of 1.55 mJy/beam at 15" resolution.
Detected 42,463 sources in the survey area.
Demonstrated the capability of LOFAR for large-scale low-frequency sky surveys.
Abstract
The Low Frequency Array (LOFAR) is the only existing radio interferometer able to observe at ultra-low frequencies (<100 MHz) with high resolution (<15") and high sensitivity (<1 mJy/beam). To exploit these capabilities, the LOFAR Surveys Key Science Project is using the LOFAR Low Band Antenna (LBA) to carry out a sensitive wide-area survey at 41-66 MHz named the LOFAR LBA Sky Survey (LoLSS). LoLSS is covering the whole northern sky above declination 24 deg with a resolution of 15" and a sensitivity of 1-2 mJy/beam (1 sigma) depending on declination, field properties, and observing conditions. Here we present the first data release. An automated pipeline was used to reduce the 95 fields included in this data release. The data reduction procedures developed for this project have general application and are currently being used to process LOFAR LBA interferometric observations. Compared…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAdaptive optics and wavefront sensing · Astronomy and Astrophysical Research · Astronomical Observations and Instrumentation
