GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey III: South Galactic Pole data release

被引：7

作者：

Franzen, T. M. O. ^{[1
,2
]}

Hurley-Walker, N. ^{[1
]}

White, S. V. ^{[1
,3
]}

Hancock, P. J. ^{[1
]}

Seymour, N. ^{[1
]}

Kapinska, A. D. ^{[4
,5
]}

Staveley-Smith, L. ^{[4
,6
]}

Wayth, R. B. ^{[1
,6
]}

机构：

[1] Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia

[2] ASTRON Netherlands Inst Radio Astron, POB 2, NL-7990 AA Dwingeloo, Netherlands

[3] Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa

[4] Univ Western Australia, Int Ctr Radio Astron Res, Crawley 6009, Australia

[5] Natl Radio Astron Observ, 1003 Lopezville Rd, Socorro, NM 87801 USA

[6] ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Stromlo, ACT, Australia

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | 2021年 / 38卷

关键词：

radio continuum: galaxies; surveys; catalogues; methods: data analysis; techniques: interferometric;

D O I：

10.1017/pasa.2021.5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 113deg(2) centred on the SGP at 20(h)40(m) < RA < 05(h)04(m) and -48 degrees < Dec < -2 degrees. At 216 MHz, the typical rms noise is approximate to 5 mJy beam(-1) and the angular resolution approximate to 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.

引用

页数：10

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