Stefan Duchesne
@sunmish.bsky.social
Radio astronomer fond of making images of the sky, painting and photographing small things, and playing video games. They/them.
Reposted by Stefan Duchesne
Today in PASA we published a new image of our Milky Way at low radio frequencies, in unprecedented colour and detail. Here's just a tiny piece of it -- the whole thing is ten times bigger!
We're seeing high energy electrons whirl around cosmic magnetic fields from exploded stars, and more!
We're seeing high energy electrons whirl around cosmic magnetic fields from exploded stars, and more!
October 29, 2025 at 3:24 AM
Today in PASA we published a new image of our Milky Way at low radio frequencies, in unprecedented colour and detail. Here's just a tiny piece of it -- the whole thing is ten times bigger!
We're seeing high energy electrons whirl around cosmic magnetic fields from exploded stars, and more!
We're seeing high energy electrons whirl around cosmic magnetic fields from exploded stars, and more!
Reposted by Stefan Duchesne
Recently published in PASA: "The Polarisation Sky Survey of the Universe’s Magnetism (POSSUM): Science Goals and Survey Description", Gaensler, B.M. et al. This is Figure 1. To read the paper visit doi.org/10.1017/pasa...
June 19, 2025 at 7:27 AM
Recently published in PASA: "The Polarisation Sky Survey of the Universe’s Magnetism (POSSUM): Science Goals and Survey Description", Gaensler, B.M. et al. This is Figure 1. To read the paper visit doi.org/10.1017/pasa...
Reposted by Stefan Duchesne
A day late posting but after a lot of hard work I give you the survey overview papers for the EMU & POSSUM ASKAP surveys #EMU survey arxiv.org/abs/2505.08271 and the #POSSUM survey arxiv.org/abs/2505.08272 🔭
The Evolutionary Map of the Universe: A new radio atlas for the southern hemisphere sky
We present the Evolutionary Map of the Universe (EMU) survey conducted with the Australian Square Kilometre Array Pathfinder (ASKAP). EMU aims to deliver the touchstone radio atlas of the southern hem...
arxiv.org
May 15, 2025 at 12:30 PM
A day late posting but after a lot of hard work I give you the survey overview papers for the EMU & POSSUM ASKAP surveys #EMU survey arxiv.org/abs/2505.08271 and the #POSSUM survey arxiv.org/abs/2505.08272 🔭
Some bougainvillea in the garden. After 13 years of use, I've finally replaced my trusty Canon 1000D - still using the same 60mm and 50mm lenses (for now), but the new camera is a very nice upgrade.
March 8, 2025 at 3:55 PM
Some bougainvillea in the garden. After 13 years of use, I've finally replaced my trusty Canon 1000D - still using the same 60mm and 50mm lenses (for now), but the new camera is a very nice upgrade.
The latest data release for the Rapid ASKAP Continuum Survey (RACS), this time at 1655.5 MHz. Here's the paper describing the RACS-high images and catalogue. You can find links to the data products in the paper: arxiv.org/abs/2501.04978
The Rapid ASKAP Continuum Survey (RACS) VI: The RACS-high 1655.5 MHz images and catalogue
We have conducted a widefield, wideband, snapshot survey using the Australian SKA Pathfinder (ASKAP) referred to as the Rapid ASKAP Continuum Survey (RACS). RACS covers $\approx$ 90% of the sky, with ...
arxiv.org
January 10, 2025 at 8:32 AM
The latest data release for the Rapid ASKAP Continuum Survey (RACS), this time at 1655.5 MHz. Here's the paper describing the RACS-high images and catalogue. You can find links to the data products in the paper: arxiv.org/abs/2501.04978
Reposted by Stefan Duchesne
Technical but important paper for anyone doing work with interferometers arxiv.org/abs/2309.00533
Revisiting a flux recovery systematic error arising from common...
The point-spread function (PSF) is a fundamental property of any astronomical
instrument. In interferometers, differing array configurations combined with
their $uv$ coverage, and various...
arxiv.org
September 4, 2023 at 3:17 PM
Technical but important paper for anyone doing work with interferometers arxiv.org/abs/2309.00533