GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey II: Galactic plane 345° < l < 67°, 180° < l < 240°. (2019)

• Record Type: Journal Article
• Authors: Hurley-Walker, N.; Hancock, P. J.; Franzen, T. M. O.; Callingham, J. R.; Offringa, A. R.; Hindson, L.; Wu, C.; Bell, M. E.; For, B.-Q.; Gaensler, B. M.; Johnston-Hollitt, M.; Kapińska, A. D.; Morgan, J.; Murphy, T.; McKinley, B.; Procopio, P.; Staveley-Smith, L.; Wayth, R. B.; Zheng, Q.
• Is Part Of: Publications of the Astronomical Society of Australia. Volume 36(2019)
• Publication Date: 2019
• Subjects: galaxies: general, -- radio continuum: surveys, -- techniques: interferometric; Astronomy -- Periodicals; Southern sky (Astronomy) -- Periodicals; Astrophysics -- Periodicals; Periodicals; 520.5
• DOI: 10.1017/pasa.2019.37
• Languages: English
• ISSNs: 1323-3580

Abstract

Abstract: This work makes available a further $2\, 860~\text{deg}^2$ of the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey, covering half of the accessible galactic plane, across 20 frequency bands sampling 72–231 MHz, with resolution $4\, \text{arcmin}-2\, \text{arcmin}$ . Unlike previous GLEAM data releases, we used multi-scale CLEAN to better deconvolve large-scale galactic structure. For the galactic longitude ranges $345^\circ < l < 67^\circ$, $180^\circ < l < 240^\circ$, we provide a compact source catalogue of 22 037 components selected from a 60-MHz bandwidth image centred at 200 MHz, with RMS noise $\approx10-20\, \text{mJy}\, \text{beam}^{-1}$ and position accuracy better than 2 arcsec. The catalogue has a completeness of 50% at ${\approx}120\, \text{mJy}$, and a reliability of 99.86%. It covers galactic latitudes $1^\circ\leq|b|\leq10^\circ$ towards the galactic centre and $|b|\leq10^\circ$ for other regions, and is available from Vizier; images covering $|b|\leq10^\circ$ for all longitudes are made available on the GLEAM Virtual Observatory (VO).server and SkyView.