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Joe Callingham

@astrojoe.bsky.social

Dutch-Australian | Astrophysicist | Head of the Square Kilometre Array (SKA) Science Group at ASTRON | Associate Professor at the University of Amsterdam

4,016 Followers  |  249 Following  |  179 Posts  |  Joined: 17.07.2023  |  1.7645

Latest posts by astrojoe.bsky.social on Bluesky

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At CSIRO today to talk all about wide-field radio monitors. Exciting times ahead. Thanks Josh Pritchard for organising. Great opening talk by Ron Ekers on the history and future of all-sky monitors

04.08.2025 01:19 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

I am enjoying learning about all things that go *bang* in the radio sky in Sydney this week. Thanks Dougal, Tara and team for organising!

30.07.2025 22:41 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

A great result! Michele is awesome

29.07.2025 23:49 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Once more to the old country. This time for The Dynamic Radio Sky Conference. Will be in Australia for 2 weeks (visiting CSIRO and USyd).

25.07.2025 12:49 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

What an amazing image and a fantastic result by @astroryan.bsky.social. This JWST image casts a completely new light on the first image we made of this star in 2019 with @eso.org's VLT. Well done Ryan and team!

22.07.2025 15:41 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Halifax completed another module in his PhDog - a visit to a radio telescope (along with some tinkering)

22.07.2025 14:41 β€” πŸ‘ 16    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Last chance to register for our upcoming conference "The Dynamic Radio Sky 2025"

Join us @sydney.edu.au from July 28th to August 1st, 2025 to discuss radio transients of all kinds!

#RadioAstronomy #AstroSci

16.07.2025 20:31 β€” πŸ‘ 8    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0
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Largest number of flowers I have got from a single orchid - 47!

20.07.2025 14:28 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Strongly polarised radio pulses from a new white-dwarf-hosting long-period transient Long-period transients (LPTs) are a new and enigmatic class of objects that produce bright pulsations in the radio, with periods far exceeding those seen in rotationally powered pulsars. The proposed ...

You can read the two papers here: arxiv.org/abs/2507.05078 and arxiv.org/abs/2507.05139

17.07.2025 09:34 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This system was co-discovered by the CHIME team led by Adam Dong (@thenrao.bsky.social). It was fantastic to work with that team and to announce the co-discovery together. Science and professionalism at work!

17.07.2025 09:34 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Astronomers uncover white dwarf system emitting bright radio pulses with strange rhythm
YouTube video by AstronNL Astronomers uncover white dwarf system emitting bright radio pulses with strange rhythm

Another great result by @astrosanne.bsky.social. She has found an new long-period transient and found it contains another white dwarf - which is doing a weird dance in the sky with another star. Hear about it all here at this snazzy video: www.youtube.com/shorts/i8Re1...

17.07.2025 09:34 β€” πŸ‘ 29    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0
Prof. Jessica Dempsey to be next SKA Observatory Director-General | SKAO The SKA Observatory is delighted to announce that Prof. Jessica Dempsey will be its next Director-General, taking up the post in June 2026 for a five-year term.

A very exciting time for the SKA project! It is in good hands with Jess! www.skao.int/en/news/654/...

14.07.2025 14:15 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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SKA Radio Array To Spot Habitable Exoearths Via Their Magnetic Auroras The low frequency component of the massive Square Kilometre Array radio observatory due online in 2027, should detect auroras on extrasolar planets many light years away.

It was fun talking to @forbes.com about all the great science the SKA Observatory will do (and LOFAR is starting) in the field of radio stars and exoplanets: www.forbes.com/sites/bruced...

14.07.2025 14:11 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

My experience is that those orgs are much more likely to write their own press release and commission art/diagrams if the paper has got up in Nature/Science than if the paper was accepted at one of the standard three.

14.07.2025 13:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Agreed but getting something up at Nature and Science usually means you can drag ESA/ESO/Other Big Org (along with your home institute) into spruiking your science (not to mention good public images). This "all guns firing" can then lead to traction in the media, ~25% of the time in my experience.

14.07.2025 13:04 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Anecdotal but I find there is a decent overlap between people with papers in 'high status' papers and the shortlist for a job. After the shortlist, not so much. I think the press that comes with paper in those journals are still useful for establishing an ECR as a "mover-and-shaker"

14.07.2025 12:51 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Clingy planets can trigger own doom, suspect Cheops and TESS Astronomers using the European Space Agency’s Cheops mission have caught an exoplanet that seems to be triggering flares of radiation from the star it orbits. These tremendous explosions are blas...

What a cool result led by @astroilin.bsky.social ! She has shown that a close in planet can induce flares on its host star. Silly planet. Read all about it here : www.esa.int/Science_Expl...

02.07.2025 16:39 β€” πŸ‘ 15    πŸ” 3    πŸ’¬ 0    πŸ“Œ 1
A bright, fiery, orange-yellow star with swooping magnetic field lines, releasing an intense flare of light into space. To the right of the star, there is a small red planet touching one of the star's magnetic field lines. The flare is blasting in the direction of the planet. A haze of gas around the planet seems to be being pushed out into space. The background is filled with stars, giving the impression of deep space.

A bright, fiery, orange-yellow star with swooping magnetic field lines, releasing an intense flare of light into space. To the right of the star, there is a small red planet touching one of the star's magnetic field lines. The flare is blasting in the direction of the planet. A haze of gas around the planet seems to be being pushed out into space. The background is filled with stars, giving the impression of deep space.

πŸ†•For the first time, astronomers using our Cheops mission have caught a planet triggering flares of radiation from the star it orbits πŸͺπŸ’₯

These tremendous explosions are blasting away the planet’s wispy atmosphere, causing it to shrink every year.

Find out more πŸ‘‰ www.esa.int/Science_Expl...
πŸ”­ πŸ§ͺ

02.07.2025 15:11 β€” πŸ‘ 151    πŸ” 28    πŸ’¬ 3    πŸ“Œ 7

Could not agree more. I am lucky A&A has not adopted this approach.

26.06.2025 17:53 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Meet your new cosmic neighbors β˜„οΈ

Introducing a swarm of over 2100 new asteroids discovered by NSF–DOE Rubin Observatory!

Rubin discovered these asteroids in about 10.5 hours of observing across 7 nights.

They've never been seen by humanity before...until now.πŸ”­πŸ§ͺ

youtu.be/DTuq-vBsDJE

23.06.2025 15:51 β€” πŸ‘ 140    πŸ” 45    πŸ’¬ 5    πŸ“Œ 18
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What a fun meeting #skao2025! I can not wait to see all the amazing science that will come from the SKAO. It was also great to catch up with so many fantastic scientists - including all these Dutch-affiliated (past, present and/or future) astronomers!

20.06.2025 09:49 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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At the #skao2025 conference in Germany this week. Looking forward to catching up with old friends and new (not to mention discussing all the awesome science we can do with the SKA)

16.06.2025 08:36 β€” πŸ‘ 11    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Some interesting changes! It is going to be hard to only have 2 extra pages in part 2 to elaborate on part 1 in an substantial way... but at least it is less work for submission.

02.06.2025 12:41 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Should become the anthem of SKAO!

30.05.2025 15:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Come along to my talk on the Square Kilometre Array Observatory (SKAO) at NAC! I have a quiz and a prize!

27.05.2025 11:12 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 1

Same here. People submitting before summer holidays? haha

22.05.2025 14:27 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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And that is a wrap! Thanks to everyone that came and had fun at the Beyond Earth Conference #beyondearthconf. Here is to the future of radio space missions!

15.05.2025 14:09 β€” πŸ‘ 25    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Mary Knapp @mknapp.bsky.social from @haystack.mit.edu presenting to #beyondearthconf about a megaconstellation for low frequency radio astronomy (GO-LoW). So cool!

14.05.2025 07:08 β€” πŸ‘ 18    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
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And the Beyond Earth: Lunar and Space Missions conference is underway! Great to have space scientists, energisers and policy makers at @astronnl.bsky.social this week #beyondearthconf

12.05.2025 11:13 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Nope. Never said I particularly enjoyed the weather for 6 months of the year… or the food haha

30.04.2025 05:16 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

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