LIGO

We are happy to share our latest news and discoveries on several platforms. Please come and find us 🦋 ligo.org 🐘 LIGO@scicomm.xyz 📷 ligo_virgo 📘 LIGO Scientific Collaboration #SciComm #GravitationalWaves

@ego_virgo We had previously observed GW190814, GW190917 and GW191219, all of which could have been from a neutron star–black hole binary, but there are uncertainties about each of these

Six years ago the @LIGO and Virgo detectors observed for the first time ever a “mixed” merger of a black hole with a neutron star 🕳️⭐ (1/6)

@MesonMatt Unfortunately our observations are consistent with them being transverse (e.g., ligo.org/science-summar…) so you'll need to revise that 100%

@LIGO Hi LIGO. I believe I have 100% definitive proof gravitational waves are not transverse but longitudinal. Thus, a spin 2 tensor massless boson would instead be a spin 0 tensor massless boson. Who would be the best to contact at LIGO in regards to this? Thank you!

"Taking care of plants is my way to do hands-on science every day and remember that science is actually part of the real world, it doesn't just exist on your computer." Find out more about Amanda at #HumansOfLIGO: humansofligo.blogspot.com/2025/12/amanda…

The 2025 winner of the LIGO Laboratory Award for Excellence in Detector Characterization & Calibration is Dr. Jane Glanzer in recognizition of critical and timely contributions to both calibration and detector characterization for the fourth observing run ligo.caltech.edu/WA/news/ligo20…

Catch up on our #GWTC4 results with the recording of our webinar introducing our latest gravitational-wave catalog release and the associated data (papers arxiv.org/abs/2508.18080 and arxiv.org/abs/2508.18079) youtu.be/fFKD-6parxY?si… #Astrodon #OpenData #GravitationalWaves

To convert 15:00 UTC to your timezone you can use timeanddate.com/worldclock/con…

Our next webinar will introduce our latest #GWTC4 release and the associated data (papers arxiv.org/abs/2508.18080 and arxiv.org/abs/2508.18079) Tomorrow at 15:00 UTC, with the recording on YouTube after Free registration wisconsin-edu.zoom.us/webinar/regist…

@ego_virgo @KAGRA_PR @LIGOLA @LIGOWA @KerrinHensley @AASNova Spinning into the merging binary black hole family tree astrobites.org/2025/11/21/gw-… by @NeevShah07 @astrobites report on the potential implications of our discovery of #GW241011 and #GW241110

@ego_virgo @KAGRA_PR @LIGOLA @LIGOWA Not Their First Rodeo: Gravitational Wave Detectors Spot Merging Black Holes That Have Merged Before aasnova.org/2025/10/28/not… by @KerrinHensley @AASNova report on our discovery of #GW241011 and #GW241110

We are pleased to announce our discovery of #GW241011 and #GW241110 Both come from binary black holes where one black hole is larger than the other. The larger black holes have large spin. Could these black holes have formed in a previous merger? ligo.org/science-summar…

Our recent low-significance candidate #S251112cm has caught some interest. A false alarm or a big discovery—we will keep investigating. Catch up in these two articles science.org/content/articl… by @hadriancho iflscience.com/candidate-grav… by @DrCarpineti #GravitationalWaves

Sad but pleased to release today our homage to LIGO’s wonderful Rai Weiss, who passed away in September at 92. It is Episode 10 of our @LIGO YouTube video series. In our last interview, he insisted that @NSF “is the hero of LIGO.” youtu.be/hsiyG6Y0t4M

@LIGOLA @LIGOWA @KAGRA_PR @ego_virgo Our fourth observing run (O4) has seen our detectors perform better than ever before. Together with @ego_virgo and @KAGRA_PR we have identified more gravitational-wave candidates than in all previous observing runs combined #O4IsHere

Our Rapid Response Teams celebrate the end of our fourth observing run. Well done everyone! ligo.caltech.edu/news/ligo20251… O4 was a success thanks to lots of hard work from across the world. #O4IsHere

Our fourth LIGO @ego_virgo @KAGRA_PR observing run has now drawn to a close. We will be busy analysing data for a while to come—watch out for more discovery announcements. We will be back next year observing.docs.ligo.org/plan/

Today marks the end of the fourth observing run of the @LIGO - Virgo - @KAGRA_PR gravitational wave detection network 🎆 It was the longest and richest run ever: 585 days and 250+ significant candidate signals, a huge increase from the 90 events of the three past runs combined🤯

Children's day is celebrated in India on 14 Nov and globally on 20 Nov. Celebrate Children's week with LIGO-India, as we highlight the wonderful initiatives and resources for school students who are keen to discover Gravitational wave science! 🧒👦✨

In half an hour!

How many people work in the Virgo Collaboration, and what are their jobs? 🧐 No one can answer this question better than Gianluca Gemme, @INFN_ researcher and spokesperson of the Virgo Collaboration!

🔭Our fourth observing run is due to end on November 18. However, we now expect to have a 6 month observing run in 2026–27 to begin in the late summer/early fall of 2026, with detectors participating as available observing.docs.ligo.org/plan/