#gravitationalwave
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drnereide.bsky.social
14 September 2015 went down in #history.

That is, in fact, the day the #LIGO researchers first detected a #gravitationalwave signal, formally named #GW150914.

journals.aps.org/prl/abstract...

#cosmology #histsci #blackholes 🔭 🧪 ⚛️
September 14, 2026 at 5:30 PM
ligo.org
What a difference a decade makes! Announcing the clearest #GravitationalWave detection ever #GW250114

youtu.be/2XmZ8-XQ9jU

📓: doi.org/10.1103/kw5g...

🔭🧪⚛️☄️ #O4IsHere
GW250114 – The Clearest of Chirps
YouTube video by LIGO Virgo KAGRA
youtu.be
September 10, 2025 at 4:20 PM
ligo.org
Happy birthday to GW150914, our first (of many) #GravitationalWave discoveries, detected 10 years ago today!

#GW10Years 🧪⚛️🔭

🖼️: @chirpmass.bsky.social
A cartoon of a 10th birthday cake being swallowed by a black hole.
September 14, 2025 at 8:53 AM
astrocent.bsky.social
Meet GW231123!
#gravitationalwave #LIGOVirgoKAGRA
einsteintelescope.bsky.social Einstein Telescope @einsteintelescope.bsky.social · Jul 14
🕳️ Our colleagues at LIGO-Virgo-KAGRA announced detection of the most massive #blackhole merger ever seen!
Event GW231123, observed on Nov 23, 2023, came from black holes of ~103 & 137 solar masses - forming one over 225 times the Sun’s mass☀️
#GravitationalWaves #GW231123
Infographic titled "Meet GW231123: a gravitational-wave signal from the most massive binary black hole observed to date". It highlights the November 23, 2023 detection by LIGO–Virgo–KAGRA of two merging black holes—103 and 137 times the mass of the Sun—producing a final black hole over 225 solar masses. The event was observed by LIGO Hanford and Livingston for 0.1 seconds. A visual chart shows the masses in comparison to typical black hole ranges, noting the "upper mass gap." An inset suggests a "hierarchical origin story"—the merging black holes may have formed from previous mergers. The infographic emphasises the black holes' rapid spins (80–90% of the maximum theoretical spin rate) and shows their detection from a distance of 2–13 billion light-years. A world map marks the locations of LIGO, Virgo, and KAGRA detectors. Credit: Simona J. Miller / Caltech
July 14, 2025 at 4:04 PM
cplberry.bsky.social
Oo! Interesting #GravitationalWave candidate #S251112cm potentially from a *subsolar* mass source

If real, the source is probably has chirp mass ~0.1–0.87 solar masses

False alarm rate 1 in 6.2 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
Rating 📏🍬

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Initial sky localization. 90% area 1,200 sq deg. Initial three-dimensional volume localization. Distance around 96 Mpc.
November 12, 2025 at 6:29 PM
ligo.org
🎉 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 🔭☄️
March 19, 2025 at 1:34 PM
ligo.org
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
September 13, 2025 at 1:18 PM
cplberry.bsky.social
THIRD #GravitationalWave candidate of the weekend #S250629bs

If real, the source is probably a binary black hole

False alarm rate 1 in 0.73 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/40...
Rating 🎄🦢

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Initial sky localization. 90% area 3,000 sq deg. Initial three-dimensional volume localization. Distance around 1.8 Gpc.
June 29, 2025 at 4:00 PM
cplberry.bsky.social
The first #GravitationalWave candidate of O4c #S250628am

If real, the source is probably a binary black hole

False alarm rate 1 in 1.9×10^6 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/40...
Rating 🍊🍧🌊

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Initial sky localization. 90% area 430 sq deg. Initial three-dimensional volume localization. Distance around 1.1 Gpc.
June 28, 2025 at 8:03 PM
ligo.org
When a black hole is formed in a merger it emits a set of #GravitationalWave frequencies, ringing like a bell

Measuring these tests the nature of black holes. #GW250114 lets us measure multiple overtones, and they agree with theory

🎞️: Pfeiffer/Buonanno/Mitman/@sxs.bsky.social

#O4IsHere ⚛️🔭☄️
September 10, 2025 at 6:07 PM
cplberry.bsky.social
A pre-snooze #GravitationalWave candidate #S250802dn

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses

False alarm rate 1 in 0.58 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/41...
Rating 🦆

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Initial sky localization. 90% area 4,500 sq deg. Initial three-dimensional volume localization. Distance around 3.0 Gpc.
August 2, 2025 at 9:47 PM
cplberry.bsky.social
Celebrate Diwali with #GravitationalWave candidate #S251021u

If real, the source is probably a binary black hole (chirp mass ~22–88 solar masses)

False alarm rate 1 in 14 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
Rating 🎆🐍

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Initial sky localization. 90% area 3,700 sq deg. Initial three-dimensional volume localization. Distance around 7.2 Gpc.
October 21, 2025 at 8:56 AM
cplberry.bsky.social
Second #GravitationalWave candidate of the day #S250927cy

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 0.6 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
Rating 🍟

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Initial sky localization. 90% area 1,600 sq deg. Initial three-dimensional volume localization. Distance around 4.1 Gpc.
September 27, 2025 at 7:42 PM
cplberry.bsky.social
Halloween #GravitationalWave candidate #S251031cq

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 45 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
Rating 👻🍫

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Initial sky localization. 90% area 170 sq deg. Initial three-dimensional volume localization. Distance around 2.1 Gpc.
October 31, 2025 at 9:10 PM
ligo.org
A delightful mini-documentary from our @uofgravity.bsky.social colleagues to celebrating the first decade of #GravitationalWave astronomy and the path ahead

youtu.be/SqhFtkQ4f2c

#GW10Years 🔭🧪⚛️🎢
University of Glasgow celebrates 10th anniversary of first gravitational wave detection
YouTube video by University of Glasgow
youtu.be
February 11, 2026 at 6:30 PM
cplberry.bsky.social
Merry Christmas from the Universe: 2 #GravitationalWave candidates #S241225c & #S241225v

If real, S241225c's source is probably a binary black hole

False alarm rate 1 in 1.6×10^7 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/38...
Rating 🍐🦚🎁

1/🧵 [🧪🔭⚛️]
S241225c initial sky localization. 90% area 5,500 sq deg. S241225c initial three-dimensional volume localization. Distance around 630 Mpc.
December 25, 2024 at 11:54 AM
cplberry.bsky.social
A #GravitationalWave candidate to brighten a cloudy Sunday #S250810ck

If real, the source is probably a binary black hole (chirp mass ~5.5–11 solar masses)

False alarm rate 1 in 5.9×10^11 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/41...
Rating 🍊🍭

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Initial sky localization. 90% area 3,500 sq deg. Initial three-dimensional sky localization. Distance around 630 Mpc.
August 10, 2025 at 4:42 PM
cplberry.bsky.social
My afternoon nap interrupted by #GravitationalWave candidate #S251018bi

If real, the source is probably a binary black hole (chirp mass ~22–88 solar masses)

False alarm rate 1 in 100 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
Rating 🐌🍦🍂

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Initial sky localization. 90% area 1,500 sq deg. Initial three-dimensional volume localization. Distance around 5.5 Gpc.
October 18, 2025 at 4:46 PM
cplberry.bsky.social
Today's #GravitationalWave candidate #S250712cd

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 1200 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/41...
Rating 🍦🛋️🎶

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Initial sky localization. 90% 310 sq deg. Initial three-dimensional volume localization. Distance around 2.2 Gpc.
July 12, 2025 at 9:18 PM
cplberry.bsky.social
Start the weekend with #GravitationalWave candidate #S250726ak

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 6800 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/41...
Rating 🍊 🐣 🥐

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Initial sky localization. 90% area 1,000 sq deg. Initial three-dimensional volume localization. Distance around 3.3 Gpc.
July 26, 2025 at 9:23 AM
rami.spaceaustralia.com
As always, @cplberry.bsky.social is an excellent source of knowledge for #GravitationalWave science!

Just stumbled across this infographic and link in this thread.

It outlines what’s encoded in the GW signal and what scientists can learn from them.

Very good!

🔭🧪
cplberry.bsky.social Christopher Berry @cplberry.bsky.social · Nov 13
Primarily from the amplitude of the signal. If you would like to know more about how information is encoded in the signal, here is an infographic I helped to make a few years ago

From @ligomagazine.bsky.social ligo.org/wp-content/u...
The waveform explained infographic It explains how the amplitude is related to the distance to the source. Having twice the distance makes the signal half as loud. The amplitude also depends on the position on the sky relative to the detectors. We are most sensitive to sources directly above or below the detectors.
November 13, 2025 at 6:49 PM
cplberry.bsky.social
Wake up to #GravitationalWave candidate #S250813k

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 250 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/41...
Rating 🐓 🚀 🍦

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Initial sky localization. 90% area 18 sq deg. Initial three-dimensional volume localization. Distance around 930 Mpc.
August 13, 2025 at 8:18 AM
cplberry.bsky.social
Sunday evening #GravitationalWave candidate #S250727cl

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 7.9 × 10^11 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/41...
Rating 🦆🦆🍫

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Initial sky localization. 90% area 380 sq deg. Three-dimensional volume localization. Distance around 1.8 Gpc.
July 27, 2025 at 7:52 PM
cplberry.bsky.social
Evening #GravitationalWave candidate #S250701bp

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 1.0×10^9 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/40...
Rating 🦉🍮🔧

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Initial sky localization. 90% area 24,000 sq deg. Initial three-dimensional volume localization. Distance around 960 Mpc.
July 1, 2025 at 9:20 PM
egovirgo.bsky.social
🧐 How many theories can be verified with a single #GravitationalWave signal? At least three, if this signal is GW250114, observed by the @ligo.org - Virgo - KAGRA Collaboration in January 2025.

#10yearsofGravitationalWaves #GW10
February 20, 2026 at 5:10 PM