GLEAM-300: The GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey at 300 MHz
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866911223877992448 |
|---|---|
| author | Duchesne, S. W. Cook, J. H. Hurley-Walker, N. Thomson, A. J. M. Paterson, S. Riseley, C. J. McSweeney, S. J. Mantovanini, S. Heald, G. Franzen, T. M. O. Ross, K. Seymour, N. Wayth, R. B. Galvin, T. J. |
| author_facet | Duchesne, S. W. Cook, J. H. Hurley-Walker, N. Thomson, A. J. M. Paterson, S. Riseley, C. J. McSweeney, S. J. Mantovanini, S. Heald, G. Franzen, T. M. O. Ross, K. Seymour, N. Wayth, R. B. Galvin, T. J. |
| contents | In this paper we present a wide-field radio survey at 300 MHz covering the sky from $-90^\circ \leq δ_\text{J2000} \lesssim +40^\circ$ using the Murchison Widefield Array (MWA). This 300-MHz survey follows the Galactic and Extragalactic All-sky MWA (GLEAM) survey, and provides an additional comparatively high-frequency data point to existing multi-frequency (72-231 MHz) data. With this data release we provide mosaic images and a catalogue of compact source components. We use two-minute snapshot observations covering 2015-2016, combining overlapping two-minute snapshot images to provide full-sensitivity mosaic images with a median root-mean-square noise of $9.1_{-2.8}^{+5.5}$ mJy beam$^{-1}$ and median angular resolution of $128.8^{\prime\prime} \times 112.5^{\prime\prime}$, with some position-dependent variation. We find a total of 338 080 unique Gaussian components across the mosaic images. The survey is the first at 300 MHz from the MWA covering the whole Southern Hemisphere. It provides a unique spectral data point that complements the existing GLEAM survey and the ongoing GLEAM-eXtended survey, and points toward results from the upcoming SKA-Low surveys. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18511 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | GLEAM-300: The GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey at 300 MHz Duchesne, S. W. Cook, J. H. Hurley-Walker, N. Thomson, A. J. M. Paterson, S. Riseley, C. J. McSweeney, S. J. Mantovanini, S. Heald, G. Franzen, T. M. O. Ross, K. Seymour, N. Wayth, R. B. Galvin, T. J. Astrophysics of Galaxies Instrumentation and Methods for Astrophysics In this paper we present a wide-field radio survey at 300 MHz covering the sky from $-90^\circ \leq δ_\text{J2000} \lesssim +40^\circ$ using the Murchison Widefield Array (MWA). This 300-MHz survey follows the Galactic and Extragalactic All-sky MWA (GLEAM) survey, and provides an additional comparatively high-frequency data point to existing multi-frequency (72-231 MHz) data. With this data release we provide mosaic images and a catalogue of compact source components. We use two-minute snapshot observations covering 2015-2016, combining overlapping two-minute snapshot images to provide full-sensitivity mosaic images with a median root-mean-square noise of $9.1_{-2.8}^{+5.5}$ mJy beam$^{-1}$ and median angular resolution of $128.8^{\prime\prime} \times 112.5^{\prime\prime}$, with some position-dependent variation. We find a total of 338 080 unique Gaussian components across the mosaic images. The survey is the first at 300 MHz from the MWA covering the whole Southern Hemisphere. It provides a unique spectral data point that complements the existing GLEAM survey and the ongoing GLEAM-eXtended survey, and points toward results from the upcoming SKA-Low surveys. |
| title | GLEAM-300: The GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey at 300 MHz |
| topic | Astrophysics of Galaxies Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2510.18511 |