GLEAM-X

Description

The GLEAM-X survey covers the entire sky south of Dec +30, using the extended configuration of the MWA, as described in Wayth et al. 2018. A description of the science motivations and survey methodology for GLEAM-X can be found here. As in the original GLEAM survey, the sky has been divided into seven drift scans in declination and five frequency ranges as summarised below. The declinations were chosen such that the peak in the primary beam response for a given setting corresponds approximately to the half power point of the neighbouring beam along the meridian at 150 MHz. The instantaneous frequency coverage of the MWA is 30.72 MHz, so the frequency range between 72 and 231 MHz was divided into five bands that provided near contiguous coverage but avoided the band around 137 MHz that was contaminated by satellite interference. 

The observing was executed as a series of four-week-long campaigns where a single declination setting was observed in a night, covering a strip approximately 10 to 12 hours in length, depending on the time of year. The Sun can be bright and time-variable at MWA frequencies, so drift scan observations were only performed at night. Within a night, the observing was broken into a series of 120 s scans for each frequency, cycling through all five frequency settings over 10 minutes. Within a scan, typically 108 s of usable data were collected. Every 2 hours throughout the night, a calibration field was observed over all five frequency settings, again as a set of 120 s scans totalling 10 minutes. Each declination strip received two meridian drift scans (HA=0), one at HA=+1, and one at HA=-1, to improve (u.v)-coverage and sensitivity. 

Publications

Tingay, Steven J., Hurley-Walker, Natasha, Ross, Kathryn, Galvin, Timothy James, Morgan, John, & Venville, Brandon 2026, Publications of the Astronomical Society of Australia Limits on unintended radio emission from geostationary and geosynchronous satellites in the SKA-low frequency range

Mantovanini, Silvia, Hurley-Walker, Natasha, Ross, Kathryn, Duchesne, Stefan, Anderson, Gemma, & Galvin, Timothy James 2025, Publications of the Astronomical Society of Australia GaLactic and extragalactic all-sky Murchison Widefield Array survey eXtended (GLEAM-X) III: Galactic plane

Mantovanini, Silvia, Hurley-Walker, N., Anderson, G., Ross, K., Duchesne, S. W., & Galvin, T. J. 2025, Monthly Notices of the Royal Astronomical Society Low radio frequency detections of known pulsars and identification of new candidates with GLEAM-X: GP

Horváth, Csanád, Hurley-Walker, Natasha, McSweeney, Samuel, Galvin, Timothy James, & Morgan, John 2025, Publications of the Astronomical Society of Australia A long period transient search method for the Murchison Widefield Array

Mcsweeney, Samuel J., Moseley, Jared, Hurley-Walker, Natasha, Grover, Garvit, Horváth, Csanád, Galvin, Timothy J., Meyers, Bradley W., & Tan, Chia Min 2025, The Astrophysical Journal Discovery of an RRAT-like Pulsar via Its Single Pulses in a Murchison Widefield Array Imaging Survey

Venville, Brandon, Parkinson, David, Hurley-Walker, Natasha, Galvin, Timothy James, & Ross, Kathryn 2024, Publications of the Astronomical Society of Australia The angular correlation function as measured by the GLEAM-X survey

Ross, Kathryn, Hurley-Walker, Natasha, Galvin, Timothy James, Venville, Brandon, Duchesne, Stefan William, Morgan, John, An, Tao, Gürkan, Gulay, Hancock, Paul J., Heald, George, Johnston-Hollitt, Melanie, & White, Sarah V. 2024, Publications of the Astronomical Society of Australia GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey II: Second Data Release

Hurley-Walker, N., McSweeney, S. J., Bahramian, A., Rea, N., Horváth, C., Buchner, S., Williams, A., Meyers, B. W., Strader, Jay, Aydi, Elias, Urquhart, Ryan, Chomiuk, Laura, Galvin, T. J., Coti Zelati, F., & Bailes, Matthew 2024, The Astrophysical Journal A 2.9 hr Periodic Radio Transient with an Optical Counterpart

Hurley-Walker, N., Zhang, X., Bahramian, A., McSweeney, S. J., O’Doherty, T. N., Hancock, P. J., Morgan, J. S., Anderson, G. E., Heald, G. H., & Galvin, T. J. 2022, Nature A radio transient with unusually slow periodic emission

Hurley-Walker, N., Galvin, T. J., Duchesne, S. W., Zhang, X., Morgan, J., Hancock, P. J., An, T., Franzen, T. M. O., Heald, G., Ross, K., Vernstrom, T., Anderson, G. E., Gaensler, B. M., Johnston-Hollitt, M., Kaplan, D. L., Riseley, C. J., Tingay, S. J., & Walker, M. 2022, Publications of the Astronomical Society of Australia GaLactic and Extragalactic All-sky Murchison Widefield Array survey eXtended (GLEAM-X) I: Survey description and initial data release

Data Access

GLEAM-X image data can be accessed via the AAO Data Central, for cutouts of up to 5 degrees. For larger images, contact the team directly (below).

GLEAM-X catalogues are accessible via Vizier:

• DR1: https://cdsarc.cds.unistra.fr/viz-bin/cat/VIII/110
• DR2: https://cdsarc.cds.unistra.fr/viz-bin/cat/VIII/113
• DR3 (Galactic Plane): https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/42.137

Raw visibility data can be found under project code G0008 from 2018 to 2021, from the All-Sky Virtual Observatory.

For any other data products, contact the team directly.

Processing has completed and the final data release is being prepared, and should be available in late 2026.

Contact

If you have any queries, please contact the GLEAM-X PI, Natasha Hurley-Walker, via nhw@icrar.org.