#o4ishere — Public Fediverse posts

The final #GravitationalWave candidate of O4? #S251117dq

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

False alarm rate 1 in 5.4×10^6 yr
GraceDB https://gracedb.ligo.org/superevents/S251117dq/
GCN https://gcn.nasa.gov/circulars/42727
Rating 🦉🥐🏔️

#Astrodon #O4IsHere

Last night's #GravitationalWave candidate #S251116en

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

False alarm rate 1 in 24,000 yr
GraceDB https://gracedb.ligo.org/superevents/S251116en
GCN https://gcn.nasa.gov/circulars/42708
Rating 🦆🦆🎀

#Astrodon #O4IsHere

Latest false alarm rate for #S251112cm with an updated background model of about 1 in 4 yr, so slightly less significant

GCN https://gcn.nasa.gov/circulars/42690
Rating 📏☕

#Astrodon #O4IsHere

Oo! Interesting #GravitationalWave candidate #S251112cm potentially from a *subsolar* mass source

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

False alarm rate 1 in 6.2 yr
GraceDB https://gracedb.ligo.org/superevents/S251112cm/
GCN https://gcn.nasa.gov/circulars/42650
Rating 📏🍬

#Astrodon #O4IsHere

An evening stroll #GravitationalWave candidate #S251108fi

If real, the source is probably a binary black hole (chirp mass ~11–44 solar masses)

False alarm rate 1 in 24000 yr
GraceDB https://gracedb.ligo.org/superevents/S251108fi/
GCN https://gcn.nasa.gov/circulars/42624
Rating 🦢🎼⛄

#Astrodon #O4IsHere

#GravitationalWave candidate #S251108dn

If real, the source is probably a binary black hole (chirp mass ~5.5–11 solar masses). A glitch in Livingston may impact analysis

False alarm rate 1 in 3.3 10^9 yr
GraceDB https://gracedb.ligo.org/superevents/S251108dn
GCN https://gcn.nasa.gov/circulars/42619
Rating 🧙🚧🍕

#Astrodon #O4IsHere

Celebrate Wednesday with #GravitationalWave candidate #S251105aj

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

False alarm rate 1 in 39000 yr
GraceDB https://gracedb.ligo.org/superevents/S251105aj/
GCN https://gcn.nasa.gov/circulars/42587
Rating 🟦🍰🦢

#Astrodon #O4IsHere

#GravitationalWave candidate #S251103f

If real, the source is probably a binary black hole (chirp mass ~11–22 solar masses)

False alarm rate 1 in 7.6×10^5 yr
GraceDB https://gracedb.ligo.org/superevents/S251103f
GCN https://gcn.nasa.gov/circulars/42564
Rating 🦆🍁🍦

#Astrodon #O4IsHere

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 https://gracedb.ligo.org/superevents/S251031cq
GCN https://gcn.nasa.gov/circulars/42529
Rating 👻🍫

#Astrodon #O4IsHere

Snoozy-time #GravitationalWave candidate #S251026bn

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

False alarm rate 1 in 6600 yr
GraceDB https://gracedb.ligo.org/superevents/S251026bn/
GCN https://gcn.nasa.gov/circulars/42462 https://gcn.nasa.gov/circulars/42465
Rating 🍨🐑🍁

#O4IsHere #Astrodon

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 https://gracedb.ligo.org/superevents/S251021u
GCN https://gcn.nasa.gov/circulars/42373
Rating 🎆🐍

#Astrodon #O4IsHere

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 https://gracedb.ligo.org/superevents/S251018bi
GCN https://gcn.nasa.gov/circulars/42357
Rating 🐌🍦🍂

#Astrodon #O4IsHere

This afternoon's #GravitationalWave candidate #S251014cn

If real, the source is probably a binary black hole (chirp mass ~11–22 solar masses)

False alarm rate 1 in 100 yr
GraceDB https://gracedb.ligo.org/superevents/S251014cn
GCN https://gcn.nasa.gov/circulars/42255
Rating 🍪🧋🦆

#Astrodon #O4IsHere

Catching up with #GravitationalWave candidate #S251013x

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

False alarm rate 1 in 2.1 yr
GraceDB https://gracedb.ligo.org/superevents/S251013x
GCN https://gcn.nasa.gov/circulars/42212 https://gcn.nasa.gov/circulars/42220
Rating 🐶🐞

#Astrodon #O4IsHere

Celebrate the full moon with #GravitationalWave candidate #S251006dd

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

False alarm rate 1 in 5.9 10^7 yr
GraceDB https://gracedb.ligo.org/superevents/S251006dd
GCN https://gcn.nasa.gov/circulars/42134
Rating 🐇🏔️🥮

#O4IsHere #Astrodon

New gravitational-wave candidate from last night!

If S251006dd turns out to be real / of astrophysical origin, it came from a coalescence of two black holes at a distance of around 2.3 billion light-years.

ℹ️ https://gracedb.ligo.org/superevents/S251006dd/view/

The chirp mass is between 5.5 and 11 solar masses. This means, if both black holes have the same mass, they each weigh between 6 and 13 solar masses.

The sky position could be determined to an area of about 100 square degrees.

#GravitationalWaves #S251006dd #BlackHoles #O4IsHere #O4c

Letzte Nacht gab es einen neuen Gravitationswellen-Kandidaten.

Wenn sich S251006dd als echt herausstellen sollte, stammt er von der Verschmelzung zweier Schwarzer Löcher in einer Entfernung von rund 2,3 Milliarden Lichtjahren.

ℹ️ https://gracedb.ligo.org/superevents/S251006dd/view/

Die Chirpmasse liegt zwischen 5,5 und 11 Sonnenmassen. Wenn beide Schwarzen Löcher gleich schwer sind, bringen sie jeweils zwischen 6 und 13 Sonnenmassen auf die Waage.

Die Himmelsposition ließ sich auf rund 100 Quadratgrad genau bestimmen.

#Gravitationswellen #S251006dd #SchwarzeLöcher #O4IsHere #O4c

Overnight #GravitationalWave candidate #S250929c

If real, the source is probably a binary black hole (chirp mass ~11–44 solar masses)

False alarm rate 1 in 1.3 yr
GraceDB https://gracedb.ligo.org/superevents/S250929c
GCN https://gcn.nasa.gov/circulars/42023
Rating 🐈‍⬛

#O4IsHere #Astrodon

Over the weekend, there were three new possible gravitational-wave signals / signal candidates. If confirmed as real, all of them came from merging black hole binaries.

1️⃣ S250927ck on Saturday afternoon: approx. 12 billion light-years away, sky position constrained to an area of 67 square degrees, chirp mass between 22 and 88 solar masses (https://gracedb.ligo.org/superevents/S250927ck/view/)

2️⃣ S250927cy on Saturday evening: approx. 13 billion light-years away, sky position constrained to an area of 944 square degrees, chirp mass between 11 and 88 solar masses. (https://gracedb.ligo.org/superevents/S250927cy/view/)

3️⃣ S250929c last night: approx. 14 billion light years away, sky position constrained to an area of approx. 2200 square degrees, chirp mass between 11 and 44 solar masses. (https://gracedb.ligo.org/superevents/S250929c/view/)

#GravitationalWaves #O4c #O4IsHere #BlackHoles

Über das Wochenende gab es drei neue mögliche Gravitationswellen-Signale. Alle stammen – falls sie als echt bestätigt werden – von verschmelzenden Schwarzen Löchern.

1️⃣ S250927ck am Samstagnachmittag: ca. 12 Milliarden Lichtjahre entfernt, Himmelsposition auf 67 Quadratgrad bestimmt, Chirpmasse zwischen 22 und 88 Sonnenmassen (https://gracedb.ligo.org/superevents/S250927ck/view/)

2️⃣ S250927cy am Samstagabend: ca. 13 Milliarden Lichtjahre entfernt, Himmelsposition auf 944 Quadratgrad bestimmt, Chirpmasse zwischen 11 und 88 Sonnenmassen. (https://gracedb.ligo.org/superevents/S250927cy/view/)

3️⃣ S250929c in der letzten Nacht: ca. 14 Milliarden Lichtjahre entfernt, Himmelsposition auf ca. 2200 Quadratgrad bestimmt, Chirpmasse zwischen 11 und 44 Sonnenmassen. (https://gracedb.ligo.org/superevents/S250929c/view/)

#Gravitationswellen #O4c #O4IsHere #SchwarzeLöcher

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 https://gracedb.ligo.org/superevents/S250927cy
GCN https://gcn.nasa.gov/circulars/42016
Rating 🍟

#O4IsHere #Astrodon

Saturday #GravitationalWave candidate #S250927ck

If real, the source is probably a binary black hole (chirp mass ~44–88 solar masses)

False alarm rate 1 in 1.0 yr
GraceDB https://gracedb.ligo.org/superevents/S250927ck
GCN https://gcn.nasa.gov/circulars/42015
Rating 🖌️

#O4IsHere #Astrodon

Yesterday's #GravitationalWave candidate #S250917aq

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

False alarm rate 1 in 2.9×10^5 yr
GraceDB https://gracedb.ligo.org/superevents/S250917aq
GCN https://gcn.nasa.gov/circulars/41850 https://gcn.nasa.gov/circulars/41856
Rating 🍰🐑🦢

#O4IsHere #AStrodon

Friday #GravitationalWave candidate #S250912f

If real, the source is probably a binary black hole (chirp mass ~44–88 solar masses)

False alarm rate 1 per 1.1×10^5 yr
GraceDB https://gracedb.ligo.org/superevents/S250912f
GCN https://gcn.nasa.gov/circulars/41810 https://gcn.nasa.gov/circulars/41814
Rating 🐠🍫🐚

#O4IsHere #Astrodon