GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey II: Galactic Plane $345^{\circ }<l<67^{\circ }$, $180^{\circ }<l<240^{\circ }$

Abstract

This work makes available a further 2,860deg${}^2$ of the GLEAM survey, covering half of the accessible Galactic Plane, across twenty frequency bands sampling $72-231$MHz, with resolution $4^{\prime }-2^{\prime }$. 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 $\approx 10-20$mJy beam${}^{-1}$ and position accuracy better than $2"$. The catalogue has a completeness of 50% at $\approx 120$mJy, and a reliability of 99.86%. It covers Galactic latitudes $1^{\circ }\le |b|\le 10^{\circ }$ toward the Galactic Centre and $|b|\le 10^{\circ }$ for other regions, and is available from Vizier; images covering $|b|\le 10^{\circ }$ for all longitudes are made available on the GLEAM VO server and SkyView.

arXiv comment14 pages, 9 figures, 2 tables, accepted to PASA

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