GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey II: Second Data Release
K. Ross, N. Hurley-Walker, T. J. Galvin, B. Venville, S. W. Duchesne,, J. Morgan, T. An, G. Gurkan, P. J. Hancock, G. Heald, M. Johnston-Hollitt, S., V. White

TL;DR
The GLEAM-X survey's second data release provides a comprehensive radio source catalogue covering a large sky area at low frequencies, with high completeness and reliability, enabling new studies of the radio universe.
Contribution
This paper presents the second data release of the GLEAM-X survey, including a large, high-quality radio source catalogue and mosaics over a significant sky area at low frequencies.
Findings
Catalogue of 624,866 components with high completeness and reliability.
Wideband mosaics covering 170-231MHz available for research.
Survey covers 12,892 deg^2 around the South Galactic Pole.
Abstract
We present the second data release for the GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey. This data release is an area of 12,892-deg^2 around the South Galactic Pole region covering 20h 40m <= RA <= 6h 40m, -90deg <= Dec <= +30deg. Observations were taken in 2020 using the Phase-II configuration of the Murchison Widefield Array (MWA) and covering a frequency range of 72-231MHz with twenty frequency bands. We produce a wideband source-finding mosaic over 170-231MHz with a median root mean squared noise of 1.5 (+1.5/-0.5) mJy beam^(-1). We present a catalogue of 624,866 components, including 562,302 components which are spectrally fit. This catalogue is 98% complete at 50mJy, and a reliability of 98.7% at a 5sigma level, consistent with expectations for this survey. The catalogue is made available via Vizier and the PASA datastore and accompanying…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Astronomical Observations and Instrumentation · Adaptive optics and wavefront sensing
