论文标题
银河系和外层面的全套Murchison广场阵列扩展（GLEAM-X）I：调查说明和初始数据发布
GaLactic and Extragalactic All-sky Murchison Widefield Array survey eXtended (GLEAM-X) I: Survey Description and Initial Data Release
论文作者
论文摘要
我们描述了一项新的低频宽带无线电调查，对南部天空。 Observations covering 72 - 231 MHz and Declinations south of $+30^\circ$ have been performed with the Murchison Widefield Array "extended" Phase II configuration over 2018 - 2020 and will be processed to form data products including continuum and polarisation images and mosaics, multi-frequency catalogues, transient search data, and ionospheric measurements.从这项工作中描述的试点字段中，我们发布了涵盖1,447平方摄氏度的初始数据发布，超过4H <ra <ra <13H，-32.7DEG <dec <-20.7deg。我们处理二十个频带抽样72-231 MHz，分辨率为$ 2'$ - $ 45英寸$，并在170-231MHz中产生宽带源图像，其根平方噪声为$ 1.27 \ pm0.15 $ pm0.15 $ mjy/beam。源。 $ \ sim50 $ mjy的完整性，$5σ$的可靠性上升到99.7％的$7σ$。
We describe a new low-frequency wideband radio survey of the southern sky. Observations covering 72 - 231 MHz and Declinations south of $+30^\circ$ have been performed with the Murchison Widefield Array "extended" Phase II configuration over 2018 - 2020 and will be processed to form data products including continuum and polarisation images and mosaics, multi-frequency catalogues, transient search data, and ionospheric measurements. From a pilot field described in this work, we publish an initial data release covering 1,447 sq. deg over 4h < RA < 13h, -32.7deg < Dec < -20.7deg. We process twenty frequency bands sampling 72 - 231 MHz, with a resolution of $2'$ - $45"$, and produce a wideband source-finding image across 170 - 231MHz with a root-mean-square noise of $1.27\pm0.15$ mJy/beam. Source-finding yields 78,967 components, of which 71,320 are fitted spectrally. The catalogue has a completeness of 98% at $\sim50$mJy, and a reliability of 98.2% at $5σ$ rising to 99.7% at $7σ$. A catalogue is available from Vizier; images are made available on AAO Data Central, SkyView, and the PASA Datastore. This is the first in a series of data releases from the GLEAM-X survey.
