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

Abstract We present the South Galactic Pole (SGP) data release from GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. These combine both years of GLEAM observations at 72–231 MHz conducted with (MWA) cover an area 5 113 $\mathrm{deg}^{2}$ centred on SGP $20^{\mathrm{h}} 40^{\mathrm{m}} < \mathrm{RA} 05^{\mathrm{h}} 04^{\mathrm{m}}$ $-48^{\circ} \mathrm{Dec} -2^{\circ} $ . At 216 MHz, typical rms noise is ${\approx}5$ mJy beam –1 angular resolution ${\approx}2$ arcmin. The source catalogue contains a total 108 851 components above $5\sigma$ , which 77% have measured spectral indices between 72 231 MHz. Improvements to reduction in this include use as sky model calibrate data, more efficient automated algorithm deconvolve snapshot images, accurate primary correct flux scale. This enables sensitive large-scale studies extragalactic populations well variability one-year timescale.