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Posts by Simon Stevenson

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How Many Kilonovae Will Rubin Observatory Help Us Spot? - AAS Nova Vera C. Rubin Observatory will detect an astonishing number of transients — including kilonovae from colliding neutron stars.

When two neutron stars collide, they shake spacetime and light up the cosmos in a brilliant flash called a kilonova. OzGrav researchers Dr Anais Möller, Dr Jade Powell and Dr Simon Stevenson explore how the Vera C. Rubin Observatory could help spot these rare events.
aasnova.org/2026/02/04/h...

2 months ago 12 6 0 1
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How Many Kilonovae Will Rubin Observatory Help Us Spot? The upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time will detect an astonishing number of transients — including kilonovae from colliding neutron stars.

The upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time will detect an astonishing number of transients — including kilonovae from colliding neutron stars. aasnova.org/2026/02/04/h... 🔭🧪

2 months ago 22 6 0 1
Screenshot of tweet from the ARC saying they’ll announce DECRA and LIEF outcomes on Tuesday 25th Nov.

Screenshot of tweet from the ARC saying they’ll announce DECRA and LIEF outcomes on Tuesday 25th Nov.

ARC says they’ll announce DECRA and LIEF outcomes tomorrow (Tuesday 25th Nov).

In recent times these announcements have been around 11am Canberra time. With 2 schemes on the same day, I assume they’ll announce one of them later in the day (probably DECRA first).

4 months ago 59 26 7 4
A portrait of Einstein and Hawking with a binary black hole in between. It is rather dramatic, and shows cool light-bending effects.

A portrait of Einstein and Hawking with a binary black hole in between. It is rather dramatic, and shows cool light-bending effects.

"Ten years ago, scientists heard the universe rumble for the first time. That first discovery of gravitational waves began a new era of astronomy."

@simon-stevenson.bsky.social writes about gravitational-wave astronomy today

theconversation.com/10-years-ago...

#GW10Years 🔭🧪⚛️

🖼️: C Knox

7 months ago 30 11 0 0
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First, gravitational waves proved Einstein correct. Now, they’ve confirmed Stephen Hawking was right about black holes.

👉 Read the full story: theconversation.com/10-year...

7 months ago 6 3 0 0
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10 years ago, gravitational waves changed astronomy. A new discovery shows there’s more to come First, gravitational waves proved Einstein correct. Now, they’ve confirmed Stephen Hawking was right about black holes.

Ten years ago, we heard the universe rumble for the first time.

That first discovery proved Einstein right.

Now, a new gravitational-wave discovery let's us put Stephen Hawking's laws of black holes to the test

Check out the article I wrote for The Conversation
theconversation.com/10-years-ago...

7 months ago 5 2 0 1
We heard the universe ring... loudly. OzGrav researchers explain!
We heard the universe ring... loudly. OzGrav researchers explain! Ten years ago, we heard the universe for the first time. Now, we’ve heard it again... only louder. The gravitational wave event GW250114, observed by the LIGO, Virgo and KAGRA collaborations, is…

Ten years ago, we heard the universe for the first time. Now, we’ve heard it again... only louder.

OzGrav researchers, Neil Lu, PhD student at the Australian National University (ANU), and Teagan Clarke, PhD student at Monash University, explain!

youtube.com/shorts/edkqk...

7 months ago 3 2 0 0
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10 years ago, gravitational waves changed astronomy. A new discovery shows there’s more to come First, gravitational waves proved Einstein correct. Now, they’ve confirmed Stephen Hawking was right about black holes.

A new gravitational wave event rocked detectors almost 10 years after the first detection. But this time, it was up to four times as loud thanks to a decade of upgrades.

OzGrav Associate Investigator Dr Simon Stevenson explains more in The Conversation:

theconversation.com/10-years-ago...

7 months ago 4 3 0 0
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We are excited to announce the discovery of #GW231123, a gravitational-wave signal from the merger of two high-mass black holes to form one about 190–265 times the mass of our Sun

ligo.org/ligo-virgo-k...

#O4IsHere 🔭🧪☄️

9 months ago 109 38 2 16
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The @ligo.org - Virgo - KAGRA Collaboration is happy to announce the detection of the merger of the most massive black holes ever observed with gravitational waves 🕳️🕳️

9 months ago 22 9 1 2
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LIGO Detects Most Massive Black Hole Merger to Date - OzGrav Gravitational waves from record‑breaking black holes challenge current astrophysical models The LIGO-Virgo-KAGRA (LVK) Collaboration has observed the heaviest black‑hole merger ever detected,…

GW231123: Heaviest black‑hole merger yet detected in gravitational waves.
~100 M☉ + ~140 M☉ → ~225 M☉ remnant, spins near physical limit.
“This blip forces us to rethink how very heavy, rapidly spinning black holes come to be.” – Prof Eric Thrane
Read: www.ozgrav.org/news/ligo-de...

9 months ago 12 5 1 0
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Scientists detect biggest ever merger of two massive black holes Ripples in space-time from collision recorded by gravitational wave detector forces a rethink of how the objects form Scientists have detected ripples in space-time from the violent collision of two massive black holes that spiralled into one another far beyond the distant edge of the Milky Way. The black holes, each more than 100 times the mass of the sun, began circling each other long ago and finally slammed together to form an even more massive black hole about 10bn light years from Earth. Continue reading...

Scientists detect biggest ever merger of two massive black holes

9 months ago 248 75 21 79
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Cosmic mystery deepens as astronomers find object flashing in both radio waves and X-rays - OzGrav Astronomers from the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) and the International Centre for Radio Astronomy Research (ICRAR), in collaboration with international teams,…

Researchers at ICRAR & OzGrav, together with an international collaboration, have identified ASKAP J1832-0911—a long-period transient that emits 2-minute pulses in both radio and X-ray wavelengths every 44 minutes.
Results published in Nature.
Read more: www.ozgrav.org/news/cosmic-...

10 months ago 5 2 0 0
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Lecturer/Senior Lecturer in Physics Company Description: Waipapa Taumata Rau | The University of AucklandKo te whare Pūtaiao | The Faculty of Science at the University of Auckland is the leading science faculty in New Zealand and one of...

So the Department of Physics at the University of Auckland is looking to hire a lecturer/senior lecturer in one of the following areas:

- Physics education research,
- Quantum optics and quantum information,
- Biophotonics and/or medical physics,
- Astrophysics and/or space technology.

1/2...

11 months ago 52 37 1 1
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Twinkling star reveals the shocking secrets of turbulent plasma in our cosmic neighbourhood For the first time, astronomers have measured the plasma layers of a shock wave surrounding a pulsar.

A new study led by OzGrav’s Dr Daniel Reardon from Swinburne University used a twinkling pulsar to reveal hidden plasma structures—and for the first time, peer inside a pulsar bow shock.

Published in Nature Astronomy. Read more via The Conversation: theconversation.com/twinkling-st...

1 year ago 7 2 0 1
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Changes to ARC grants will make it harder for Australia to combat Trump chaos, researchers warn Plan to cut most standalone positions in favour of shorter fellowships will hurt international recruitment, critics say

Guardian Australia @australia.theguardian.com reporting on the proposed changes to the ARC grants system.

There’s concern that getting rid of standalone fellowships will have lots of unintended consequences, especially for Early-Career Researchers.

By @donnadlu.bsky.social

1 year ago 54 33 2 0
Thread by @ARC_Tracker on Thread Reader App @ARC_Tracker: 🚨#DECRA #DE23 applicants❗️ Rejoinders open in RMS tomorrow (28 Apr) – short🧵👇 First: Sooo important to read reviews ASAP. Can be hard. But do it. Why? #ARC3DayRule. For fun, ARC gives yo...

#FutureFellowships #FT25

Detailed Assessor reports are now available in RMS and rejoinders have opened.

Here’s an older thread with suggestions on dealing with assessor reports – especially the #ARC3DayRule – and constructing a rejoinder.
threadreaderapp.com/thread/15191...

1 year ago 18 9 0 0
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The Devils UK Tour - Joe Abercrombie UK tour dates for the Devils have been announced today, starting on UK publication date on 6th May, and they look a little something like this: The London one is in conversation with Steven Pacey, whi...

UK tour dates for the Devils have been announced. Further details over here... joeabercrombie.com/the-devils-u...

1 year ago 81 10 15 3