LIGO Scientific Collaboration
@ligo.org
Official account of the LIGO Scientific Collaboration. We detect gravitational waves!
Email: [email protected]
Email: [email protected]
Pinned
LIGO Scientific Collaboration
@ligo.org
Β· Aug 26
Results from the first part of our fourth LIGO @egovirgo.bsky.social KAGRA observing run are out today!
We're pleased to share the largest catalog of gravitational-wave observations with more discoveries of black holes and neutron stars
π° arxiv.org/abs/2508.18082
ππ§ͺβοΈβοΈ #GWTC4
We're pleased to share the largest catalog of gravitational-wave observations with more discoveries of black holes and neutron stars
π° arxiv.org/abs/2508.18082
ππ§ͺβοΈβοΈ #GWTC4
Reposted by LIGO Scientific Collaboration
EGO and the PICO Project, funded by the European Union, are pleased to offer, for the second year in a row, remote tours to the Virgo interferometer. π«
π Donβt miss this opportunity and register for one of the available dates via the form: tinyurl.com/Virgo-virtua...
π Donβt miss this opportunity and register for one of the available dates via the form: tinyurl.com/Virgo-virtua...
January 14, 2026 at 4:50 PM
EGO and the PICO Project, funded by the European Union, are pleased to offer, for the second year in a row, remote tours to the Virgo interferometer. π«
π Donβt miss this opportunity and register for one of the available dates via the form: tinyurl.com/Virgo-virtua...
π Donβt miss this opportunity and register for one of the available dates via the form: tinyurl.com/Virgo-virtua...
Reposted by LIGO Scientific Collaboration
Today, 10 years ago, we had the first laser light on LPF! ππ°οΈ
Laser interferometry was used on LPF to track the position of the test masses along the sensitive axis, and will be used on LISA too for the same purpose.
#LPF10anniversary #LISAMission
[Image credits: University of Glasgow]
Laser interferometry was used on LPF to track the position of the test masses along the sensitive axis, and will be used on LISA too for the same purpose.
#LPF10anniversary #LISAMission
[Image credits: University of Glasgow]
January 13, 2026 at 5:03 PM
Today, 10 years ago, we had the first laser light on LPF! ππ°οΈ
Laser interferometry was used on LPF to track the position of the test masses along the sensitive axis, and will be used on LISA too for the same purpose.
#LPF10anniversary #LISAMission
[Image credits: University of Glasgow]
Laser interferometry was used on LPF to track the position of the test masses along the sensitive axis, and will be used on LISA too for the same purpose.
#LPF10anniversary #LISAMission
[Image credits: University of Glasgow]
Happy birthday to #GW250114 our loudest detection to date!
In this video, @drbecky.bsky.social explains how we used the signal to test one of Hawking's fundamental ideas about black holes
www.youtube.com/watch?v=_fLO...
π§ͺβοΈπ
In this video, @drbecky.bsky.social explains how we used the signal to test one of Hawking's fundamental ideas about black holes
www.youtube.com/watch?v=_fLO...
π§ͺβοΈπ
FINALLY: evidence for Hawking's AREA THEOREM of black holes
YouTube video by Dr. Becky
www.youtube.com
January 14, 2026 at 11:43 AM
Happy birthday to #GW250114 our loudest detection to date!
In this video, @drbecky.bsky.social explains how we used the signal to test one of Hawking's fundamental ideas about black holes
www.youtube.com/watch?v=_fLO...
π§ͺβοΈπ
In this video, @drbecky.bsky.social explains how we used the signal to test one of Hawking's fundamental ideas about black holes
www.youtube.com/watch?v=_fLO...
π§ͺβοΈπ
Reposted by LIGO Scientific Collaboration
On this day, for #LPF10anniversary: following the successful separation from the launch vehicle, the mission operations team at ESOC undertook one of the most complex Launch and Early Operations Phases (LEOP) ever undertaken or an ESA mission.
Watch it here π½οΈ www.youtube.com/watch?v=maKX...
Watch it here π½οΈ www.youtube.com/watch?v=maKX...
LISA Pathfinderβs journey to L1
YouTube video by European Space Agency, ESA
www.youtube.com
December 12, 2025 at 3:50 PM
On this day, for #LPF10anniversary: following the successful separation from the launch vehicle, the mission operations team at ESOC undertook one of the most complex Launch and Early Operations Phases (LEOP) ever undertaken or an ESA mission.
Watch it here π½οΈ www.youtube.com/watch?v=maKX...
Watch it here π½οΈ www.youtube.com/watch?v=maKX...
"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/aman...
π§ͺπ
Find out more about Amanda at #HumansOfLIGO: humansofligo.blogspot.com/2025/12/aman...
π§ͺπ
December 13, 2025 at 3:50 PM
"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/aman...
π§ͺπ
Find out more about Amanda at #HumansOfLIGO: humansofligo.blogspot.com/2025/12/aman...
π§ͺπ
Reposted by LIGO Scientific Collaboration
We completed our setup and used it to characterize the photodiodes (red arrow) to be used in the suspension. @LIGO Livingston
December 4, 2025 at 3:21 PM
We completed our setup and used it to characterize the photodiodes (red arrow) to be used in the suspension. @LIGO Livingston
Happy anniversary!
December 4, 2025 at 2:18 PM
Happy anniversary!
Reposted by LIGO Scientific Collaboration
From LISA Pathfinder to LISA: Celebrating 10 years of LPF launch π°π
"A fantastic mission. Everybody who worked with LPF felt in love with the mission."
- Stefano Vitale, LPF PI
"A fantastic mission. Everybody who worked with LPF felt in love with the mission."
- Stefano Vitale, LPF PI
December 4, 2025 at 1:30 PM
From LISA Pathfinder to LISA: Celebrating 10 years of LPF launch π°π
"A fantastic mission. Everybody who worked with LPF felt in love with the mission."
- Stefano Vitale, LPF PI
"A fantastic mission. Everybody who worked with LPF felt in love with the mission."
- Stefano Vitale, LPF PI
Relive the Moment: LISA Pathfinder has launched! ππ°οΈ
At 04:04UTC on the 3rd December, LISA Pathfinder successfully launched on top of a VEGA launcher.
The rockets first three stages burned for ~7minutes, followed by a nine minute burn for the rockets upper stage.
www.esa.int/ESA_Multimed...
At 04:04UTC on the 3rd December, LISA Pathfinder successfully launched on top of a VEGA launcher.
The rockets first three stages burned for ~7minutes, followed by a nine minute burn for the rockets upper stage.
www.esa.int/ESA_Multimed...
LISA Pathfinder launch - Part 1
www.esa.int
December 4, 2025 at 10:06 AM
Reposted by LIGO Scientific Collaboration
It's been 10 years since our dear LISA Pathfinder (LPF) launched! For the ones who don't know much about it, here's a quick refresher about your favorite mission's precursor π°οΈπ
#LPF10anniversary #LISAMission
#LPF10anniversary #LISAMission
December 3, 2025 at 1:39 PM
It's been 10 years since our dear LISA Pathfinder (LPF) launched! For the ones who don't know much about it, here's a quick refresher about your favorite mission's precursor π°οΈπ
#LPF10anniversary #LISAMission
#LPF10anniversary #LISAMission
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
www.ligo.caltech.edu/WA/news/ligo...
www.ligo.caltech.edu/WA/news/ligo...
December 1, 2025 at 4:59 PM
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
www.ligo.caltech.edu/WA/news/ligo...
www.ligo.caltech.edu/WA/news/ligo...
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?...
π§ͺβοΈπβοΈ
youtu.be/fFKD-6parxY?...
π§ͺβοΈπβοΈ
GWTC 4.0 Introduction and Data Release
YouTube video by LIGO Virgo KAGRA
youtu.be
November 25, 2025 at 12:41 PM
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?...
π§ͺβοΈπβοΈ
youtu.be/fFKD-6parxY?...
π§ͺβοΈπβοΈ
Spinning into the merging binary black hole family tree
astrobites.org/2025/11/21/g... by
@neevshah101.bsky.social
@astrobites.bsky.social report on the potential implications of our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
astrobites.org/2025/11/21/g... by
@neevshah101.bsky.social
@astrobites.bsky.social report on the potential implications of our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
Not Their First Rodeo: Gravitational Wave Detectors Spot Merging Black Holes That Have Merged Before
The gravitational wave events GW241011 and GW241110 provide strong evidence for the growth of black holes through successive mergers.
aasnova.org
November 24, 2025 at 5:22 PM
Spinning into the merging binary black hole family tree
astrobites.org/2025/11/21/g... by
@neevshah101.bsky.social
@astrobites.bsky.social report on the potential implications of our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
astrobites.org/2025/11/21/g... by
@neevshah101.bsky.social
@astrobites.bsky.social report on the potential implications of our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
Our recent low-significance candidate #S251112cm has caught some interest. A false alarm or a big discoveryβwe will keep investigating. Catch up in these two articles
www.science.org/content/arti... by Adrian Cho
www.iflscience.com/candidate-gr... by @drcarpineti.bsky.social
ππ§ͺβοΈβοΈ
www.science.org/content/arti... by Adrian Cho
www.iflscience.com/candidate-gr... by @drcarpineti.bsky.social
ππ§ͺβοΈβοΈ
www.science.org
November 22, 2025 at 3:45 PM
Our recent low-significance candidate #S251112cm has caught some interest. A false alarm or a big discoveryβwe will keep investigating. Catch up in these two articles
www.science.org/content/arti... by Adrian Cho
www.iflscience.com/candidate-gr... by @drcarpineti.bsky.social
ππ§ͺβοΈβοΈ
www.science.org/content/arti... by Adrian Cho
www.iflscience.com/candidate-gr... by @drcarpineti.bsky.social
ππ§ͺβοΈβοΈ
Reposted by LIGO Scientific Collaboration
Sad but pleased to release today our homage to LIGOβs wonderful Rai Weiss, who passed away in September just shy of his 93rd birthday. It is Episode 10 of our 9-year @ligo.org YouTube video series. In our last interview, he insisted that @NSF βis the hero of LIGO.β π§ͺ
youtu.be/hsiyG6Y0t4M
youtu.be/hsiyG6Y0t4M
EPISODE10 - "RAI WEISS: LIGO'S HEART AND SOUL
YouTube video by Advanced LIGO Documentary Project
youtu.be
November 20, 2025 at 4:56 PM
Sad but pleased to release today our homage to LIGOβs wonderful Rai Weiss, who passed away in September just shy of his 93rd birthday. It is Episode 10 of our 9-year @ligo.org YouTube video series. In our last interview, he insisted that @NSF βis the hero of LIGO.β π§ͺ
youtu.be/hsiyG6Y0t4M
youtu.be/hsiyG6Y0t4M
Our fourth observing run (O4) has seen our detectors perform better than ever before. Together with @egovirgo.bsky.social and KAGRA we have identified more gravitational-wave candidates than in all previous observing runs combined
#O4IsHere πβοΈπ§ͺ
#O4IsHere πβοΈπ§ͺ
November 19, 2025 at 8:28 PM
Our fourth observing run (O4) has seen our detectors perform better than ever before. Together with @egovirgo.bsky.social and KAGRA we have identified more gravitational-wave candidates than in all previous observing runs combined
#O4IsHere πβοΈπ§ͺ
#O4IsHere πβοΈπ§ͺ
Our Rapid Response Teams celebrate the end of our fourth observing run. Well done everyone!
www.ligo.caltech.edu/news/ligo202...
O4 was a success thanks to lots of hard work from across the world.
πβοΈπ§ͺ
www.ligo.caltech.edu/news/ligo202...
O4 was a success thanks to lots of hard work from across the world.
πβοΈπ§ͺ
November 19, 2025 at 12:19 PM
Our Rapid Response Teams celebrate the end of our fourth observing run. Well done everyone!
www.ligo.caltech.edu/news/ligo202...
O4 was a success thanks to lots of hard work from across the world.
πβοΈπ§ͺ
www.ligo.caltech.edu/news/ligo202...
O4 was a success thanks to lots of hard work from across the world.
πβοΈπ§ͺ
Our fourth LIGO @egovirgo.bsky.social KAGRA observing run has now drawn to a close. We will be busy analysing data for a while to comeβwatch out for more discovery announcements.
We will be back next year observing.docs.ligo.org/plan/
We will be back next year observing.docs.ligo.org/plan/
IGWN | Observing Plans
observing.docs.ligo.org
November 18, 2025 at 4:10 PM
Our fourth LIGO @egovirgo.bsky.social KAGRA observing run has now drawn to a close. We will be busy analysing data for a while to comeβwatch out for more discovery announcements.
We will be back next year observing.docs.ligo.org/plan/
We will be back next year observing.docs.ligo.org/plan/
In half an hour!
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/regi...
βοΈπ
Tomorrow at 15:00 UTC, with the recording on YouTube after
Free registration wisconsin-edu.zoom.us/webinar/regi...
βοΈπ
November 13, 2025 at 2:26 PM
In half an hour!
Reposted by LIGO Scientific Collaboration
In the latest edition of the #LIGOMagazine, Catalina Miritescu told us all about bringing #GravitationalWave noise hunting with @ligo.org[email protected] to the Romanian National Astronomy and Astrophysics Olympiad!
Read all about it at (pdf, page 38): ligo.org/wp-content/u...
Read all about it at (pdf, page 38): ligo.org/wp-content/u...
November 13, 2025 at 11:31 AM
In the latest edition of the #LIGOMagazine, Catalina Miritescu told us all about bringing #GravitationalWave noise hunting with @ligo.org[email protected] to the Romanian National Astronomy and Astrophysics Olympiad!
Read all about it at (pdf, page 38): ligo.org/wp-content/u...
Read all about it at (pdf, page 38): ligo.org/wp-content/u...
Reposted by LIGO Scientific Collaboration
LIGO, Virgo and KAGRA constantly battle with quantum effects on their mirrors (objects weighing more than 40 kg!), such as quantum radiation pressure noise, that is, fluctuations of the laser field that causes the mirrors to jitter.
October 8, 2025 at 7:50 AM
LIGO, Virgo and KAGRA constantly battle with quantum effects on their mirrors (objects weighing more than 40 kg!), such as quantum radiation pressure noise, that is, fluctuations of the laser field that causes the mirrors to jitter.
To convert 15:00 UTC to your timezone you can use www.timeanddate.com/worldclock/c...
Time Zone Converter β Time Difference Calculator
Find the exact time difference with the Time Zone Converter – Time Difference Calculator which converts the time difference between places and time zones all over the world.
www.timeanddate.com
November 12, 2025 at 11:10 AM
To convert 15:00 UTC to your timezone you can use www.timeanddate.com/worldclock/c...
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/regi...
βοΈπ
Tomorrow at 15:00 UTC, with the recording on YouTube after
Free registration wisconsin-edu.zoom.us/webinar/regi...
βοΈπ
November 12, 2025 at 11:09 AM
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/regi...
βοΈπ
Tomorrow at 15:00 UTC, with the recording on YouTube after
Free registration wisconsin-edu.zoom.us/webinar/regi...
βοΈπ
Congratulations to Patrick for being honored by the American Physical Society! Prof. Brady is a long-standing member of our collaboration and our former Spokersperson
Congratulations to Patrick R. Brady, of the University of Wisconsin-Milwaukee, on being awarded the 2026 Richard A. Isaacson Award in Gravitational-Wave Science! His citation reads:
βοΈπ§ͺ 1/2
βοΈπ§ͺ 1/2
November 5, 2025 at 8:41 PM
Congratulations to Patrick for being honored by the American Physical Society! Prof. Brady is a long-standing member of our collaboration and our former Spokersperson
Not Their First Rodeo: Gravitational Wave Detectors Spot Merging Black Holes That Have Merged Before
aasnova.org/2025/10/28/n... by Kerry Hensley
@aasnova.org report on our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
aasnova.org/2025/10/28/n... by Kerry Hensley
@aasnova.org report on our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
Not Their First Rodeo: Gravitational Wave Detectors Spot Merging Black Holes That Have Merged Before
The gravitational wave events GW241011 and GW241110 provide strong evidence for the growth of black holes through successive mergers.
aasnova.org
November 5, 2025 at 9:55 AM
Not Their First Rodeo: Gravitational Wave Detectors Spot Merging Black Holes That Have Merged Before
aasnova.org/2025/10/28/n... by Kerry Hensley
@aasnova.org report on our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ
aasnova.org/2025/10/28/n... by Kerry Hensley
@aasnova.org report on our discovery of #GW241011 and #GW241110
πβοΈπ§ͺβοΈ