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Reposted by Gravity Exploration Institute

LIGO Scientific Collaboration @ligo.org · 26d

A new mini-documentary by our colleagues at @uofgravity.bsky.social celebrating the 10th anniversary of our first detection and the progress in #GravitationalWave astronomy

youtu.be/SqhFtkQ4f2c

#GW10Years 🔭🧪⚛️🎢

University of Glasgow celebrates 10th anniversary of first gravitational wave detection

YouTube video by University of Glasgow

youtu.be

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Reposted by Gravity Exploration Institute

LIGO Scientific Collaboration @ligo.org · 25d

The latest issue of @ligomagazine.bsky.social is out now and free to read

🎉 Celebrate 10 years of gravitational-wave astronomy with us 🎉

ligo.org/wp-content/u...

🔭🧪⚛️ #GW10Years

Front cover of issue 27 of the LIGO Magazine

10 years of graviational wave astronomy

GW150914 to GW231123: a signal that changed to world (p 6)

GW231123: the most massive black hole merger yet! (p 24)

GWTC-4.0 cataglgue paper (p 20)

GW observatories of the future (p 34)

Climate change conversations: Fossil-free supercomputing (p 40)

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Gravity Exploration Institute @gravitycardiff.bsky.social · 25d

Today we celebrate the 10th anniversary of the first detection of gravitational waves by @ligo.org 🎉 Research by members of the Gravity Exploration Institute in Cardiff helped lay the foundation for that detection, which opened an exciting new window to the universe. Read more about it here:

A decade of discovery: Academics celebrate 10 years since the first detection of gravitational waves amid announcement of exciting new breakthrough

Scientists celebrate anniversary and tests of Stephen Hawking's black hole area theorem

www.cardiff.ac.uk

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Gravity Exploration Institute @gravitycardiff.bsky.social · Jul 14

“Black holes this massive are forbidden through standard stellar evolution models. One possibility is that the two black holes in this binary formed through earlier mergers of smaller black holes.”

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Gravity Exploration Institute @gravitycardiff.bsky.social · Jul 14

From the article: “This is the most massive black hole binary we’ve observed through gravitational waves, and it presents a real challenge to our understanding of black hole formation,” says Professor Mark Hannam, from Cardiff University and a member of the LIGO Scientific Collaboration.

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Gravity Exploration Institute @gravitycardiff.bsky.social · Jul 14

Read more about the new announcement, including a quote from the Gravity Exploration Institute's @markdhannam.bsky.social here:
ligo.org/ligo-virgo-k...

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Reposted by Gravity Exploration Institute

Mark Hannam @markdhannam.bsky.social · Jul 14

My summary of the latest @ligo.org observation paper.

Massive black holes!

open.substack.com/pub/fictiona...

GW231123: an unearthly signal

A report on some actual science

open.substack.com

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Gravity Exploration Institute @gravitycardiff.bsky.social · Jul 13

Several members from Cardiff's Gravity Exploration Institute will be taking part in this special gravitational wave science ceilidh (traditional Scottish dance) in Glasgow this week!

University of Glasgow @uofglasgow.bsky.social · Jul 11

Hundreds of scientists are set to take part in the first performance of a new Scottish country dance inspired by the ripples in spacetime whose existence was first theorised by Albert Einstein.

More: gla.ac/3ICip4Q

#GR24Amaldi16 #GravitationalWaves #Glasgow
@uofgravity.bsky.social

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Gravity Exploration Institute @gravitycardiff.bsky.social · May 21

Prof Stephen Fairhurst of the Gravity Exploration Institute in Cardiff is the new spokesperson for the LIGO Scientific Collaboration! He is the first person from a non-US institution to hold this position. We are very pleased and proud that his many years of work within the LSC have been recognised.

LIGO Scientific Collaboration @ligo.org · May 20

We are pleased to introduce our new spokesperson, Prof. Stephen Fairhurst of @gravitycardiff.bsky.social!

"I look forward to working with the excellent scientists and engineers in the collaboration"

ligo.org/lsc-welcomes...

Steve looking happy on an uncharacteristically sunny day in the UK.

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Reposted by Gravity Exploration Institute

LIGO Scientific Collaboration @ligo.org · Mar 19

🎉 We have reached 200 #GravitationalWave candidates in O4! 🎉

The fourth observing run (O4) of our detector network has had the best performance so far, with more candidates than ever before! We are currently busy analysing all these wonderful data and look forward to sharing results

#O4IsHere 🔭☄️

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Reposted by Gravity Exploration Institute

LIGO Scientific Collaboration @ligo.org · Feb 11

Nine years ago we announced to the world that we have detected #GravitationalWaves we did it!

youtu.be/lslUF9gdYI8

LIGO -- Dave Reitze We have Detected Gravitational Waves

YouTube video by sciencejedi

youtu.be

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Gravity Exploration Institute @gravitycardiff.bsky.social · Feb 10

You can read the paper here: journals.aps.org/prd/abstract...

Or the preprint version here: arxiv.org/abs/2009.14611

Toward real-time detection of unmodeled gravitational wave transients using convolutional neural networks

Convolutional neural networks (CNNs) have demonstrated potential for the real-time analysis of data from gravitational wave detector networks for the specific case of signals from coalescing compact-o...

journals.aps.org

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Gravity Exploration Institute @gravitycardiff.bsky.social · Feb 10

Compared to other unmodelled transient searches currently used for the LIGO and Virgo detectors, MLy is not only much faster, it also uses only a fraction of the computing power, making it extremely efficient.

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Gravity Exploration Institute @gravitycardiff.bsky.social · Feb 10

...those from core-collapse supernovae, gamma ray bursts, or unknown sources.

Our new pipeline, MLy (pronounced “Emily”) will be able to detect such unmodelled signals within seconds, which is important for quickly triggering follow up searches in electromagnetic radiation and energetic particles.

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Gravity Exploration Institute @gravitycardiff.bsky.social · Feb 10

Although CNNs have previously been used for analysing gravitational waves from sources with modelled signals, such as binary black holes and neutron stars, this is the first time the method has been usefully applied for the real-time detection of unmodelled signals in LIGO-Virgo data, such as...

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Gravity Exploration Institute @gravitycardiff.bsky.social · Feb 10

A recent paper from the GEI presents the first convolutional neural network (CNN) analysis pipeline for the detection of generic transient gravitational waves signals, with sensitivity across a wide range of signal parameters, used for real-time searches in data from the LIGO and Virgo detectors.

Screenshot of the paper:
"Toward real-time detection of unmodeled gravitational wave transients using convolutional neural networks"
By Vasileios Skliris, Michael R. K. Norman, and Patrick J. Sutton. Physical Review D 110, 104034 – Published 15 November, 2024.

5 types of gravitational wave signals which were injected into real LIGO-Virgo detector data in order to test the efficiency of the detection algorithm: a high frequency white noise burst (WNB), binary black hole merger (BBH), core-collapse supernova (CCSN), circularly polarized sine-Gaussian (CSG), and a cosmic string cusp (CUSP).

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Reposted by Gravity Exploration Institute

Living Reviews | Relativity @livingrev-relativ.bsky.social · Jan 25

Living Reviews in Relativity welcomes B. S. Sathyaprakash! Expert from Penn State University and Cardiff University joins as new Associate Editor for Gravitational Waves:
link.springer.com/journal/4111... #LivingRevRelativ #MeetTheEditors

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Gravity Exploration Institute @gravitycardiff.bsky.social · Jan 1

Happy New Year! Blwyddyn Newydd Dda!

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Gravity Exploration Institute @gravitycardiff.bsky.social · Dec 13

The people who attended those workshops helped shape the field of gravitational physics over the next 50 years and many are still active today.

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Gravity Exploration Institute @gravitycardiff.bsky.social · Dec 13

... physicists and mathematicians could discuss relativity and gravitation. Experts came from around the world to discuss that year's topic, to present their recent work, to learn more about what others were doing in their field, and to spend time together, strengthening their scientific community.

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Gravity Exploration Institute @gravitycardiff.bsky.social · Dec 13

The first Gregynog Relativity Workshop was held at Gregynog Hall in Mid Wales, September 1-3, 1975. The topic was Thermodynamic Properties of Gravitational Fields.

#flashbackfriday

When Bernard Schutz @bschutz.bsky.social moved to Cardiff in 1974, he began to organize workshops where...

A group of mathematicians and physicists standing in front of an old building. Their clothes identify the time as the 1970s.

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Reposted by Gravity Exploration Institute

arxiv gr-qc @arxiv-gr-qc.bsky.social · Nov 22

Abhinav Patra, Lorenzo Aiello, Aldo Ejlli, William L. Griffiths, Alasdair L. James, Nikitha Kuntimaddi, Ohkyung Kwon, Eyal Schwartz, Henning Vahlbruch, Sander M. Vermeulen, Katherine L....
Direct Limits on Stochastic Length Fluctuations at Radio Frequencies
https://arxiv.org/abs/2410.09175

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Gravity Exploration Institute @gravitycardiff.bsky.social · Nov 20

And for anyone interested in more technical details, here is a recent preprint of a paper about the experiment, with its first results.

Direct Limits on Stochastic Length Fluctuations at Radio Frequencies

The Quantum-Enhanced Space-Time (QUEST) experiment consists of a pair of co-located Power Recycled Michelson Interferometers, each designed to have a broadband, shot-noise limited displacement sensiti...

arxiv.org

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Gravity Exploration Institute @gravitycardiff.bsky.social · Nov 20

You can read more about the QUEST experiment here, with photos of the empty lab in May, just before we began building the experiment.

QUEST for answers to mysteries of universe underway in new Cardiff lab

Wolfson and HEFCW funded facility home to unique instruments for gravitational physics research

www.cardiff.ac.uk

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Gravity Exploration Institute @gravitycardiff.bsky.social · Nov 20

QUEST is already the most sensitive table-top system of its kind, and ongoing improvements will allow us to probe further, for a wide variety of stationary signals like signatures of quantised space-time, scalar field dark matter candidates, and stochastic and continuous gravitational waves.

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