GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey III: South Galactic Pole data release. (6th April 2021)
- Record Type:
- Journal Article
- Title:
- GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey III: South Galactic Pole data release. (6th April 2021)
- Main Title:
- GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey III: South Galactic Pole data release
- Authors:
- Franzen, T. M. O.
Hurley-Walker, N.
White, S. V.
Hancock, P. J.
Seymour, N.
Kapińska, A. D.
Staveley-Smith, L.
Wayth, R. B. - Abstract:
- Abstract: We present the South Galactic Pole (SGP) data release from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. These data combine both years of GLEAM observations at 72–231 MHz conducted with the Murchison Widefield Array (MWA) and cover an area of 5 113 $\mathrm{deg}^{2}$ centred on the SGP at $20^{\mathrm{h}} 40^{\mathrm{m}} < \mathrm{RA} < 05^{\mathrm{h}} 04^{\mathrm{m}}$ and $-48^{\circ} < \mathrm{Dec} < -2^{\circ} $ . At 216 MHz, the typical rms noise is ${\approx}5$ mJy beam –1 and the angular resolution ${\approx}2$ arcmin. The source catalogue contains a total of 108 851 components above $5\sigma$, of which 77% have measured spectral indices between 72 and 231 MHz. Improvements to the data reduction in this release include the use of the GLEAM Extragalactic catalogue as a sky model to calibrate the data, a more efficient and automated algorithm to deconvolve the snapshot images, and a more accurate primary beam model to correct the flux scale. This data release enables more sensitive large-scale studies of extragalactic source populations as well as spectral variability studies on a one-year timescale.
- Is Part Of:
- Publications of the Astronomical Society of Australia. Volume 38(2021)
- Journal:
- Publications of the Astronomical Society of Australia
- Issue:
- Volume 38(2021)
- Issue Display:
- Volume 38, Issue 2021 (2021)
- Year:
- 2021
- Volume:
- 38
- Issue:
- 2021
- Issue Sort Value:
- 2021-0038-2021-0000
- Page Start:
- Page End:
- Publication Date:
- 2021-04-06
- Subjects:
- radio continuum: galaxies, -- surveys, -- catalogues, -- methods: data analysis, -- techniques: interferometric
Astronomy -- Periodicals
Southern sky (Astronomy) -- Periodicals
Astrophysics -- Periodicals
Periodicals
520.5 - Journal URLs:
- http://journals.cambridge.org/action/displayJournal?jid=pas ↗
http://www.publish.csiro.au/?nid=138 ↗ - DOI:
- 10.1017/pasa.2021.5 ↗
- Languages:
- English
- ISSNs:
- 1323-3580
- Deposit Type:
- Legaldeposit
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- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library HMNTS - ELD Digital store
- Ingest File:
- 16601.xml