2026-09-05 14:51:18 UTC
JD 2461289.12
STATION 04 · MULTI-MESSENGER OBSERVATORY WIRE

High-Energy Transient Alert Desk

Continuous verification desk for extreme cosmological transients: gravitational waves from compact mergers, millisecond fast radio bursts, ultra-relativistic gamma-ray jets, and astrophysical PeV neutrinos.

Indexed Transients ⚡
14
Multi-messenger events catalogued
Deepest Cosmic Horizon REDSHIFT
z = 1.19
AT 2022cmc · 8.5 Billion light-years
Shortest Coherent Pulse DURATION
0.33 ms
FRB 20220610A · ASKAP detection
Max Photon Energy ENERGY
18 TeV
GRB 221009A · LHAASO gamma-ray
All Wire (14) Gravitational Wave (3) Fast Radio Burst (3) Gamma-Ray Burst (3) Supernova / Optical (2) Tidal Disruption Event (1) High-Energy Neutrino (2)
GW230529_181500
LIGO Livingston / KAGRA / Virgo (O4 Run)
Gravitational Wave
Sky Coordinates
13h 09m 24.0s · -24° 49' 12"
Luminosity Distance
650 Million ly (200 Mpc)
Constellation
Corvus / Hydra border
Redshift
z = 0.0450

Merger in the Lower Mass Gap: Neutron Star Collides with Mystery Compact Object

GW230529 represents a landmark gravitational wave detection by the LIGO-Virgo-KAGRA Collaboration during the O4 run. The primary component was determined to be 2.5 to 4.5 solar masses—placing it squarely in the elusive lower "mass gap" between known neutron stars and stellar-mass black holes. The secondary object was a 1.2 to 2.0 solar mass neutron star.

ZTF / DECam Fermi GBM Swift XRT
GW170817
LIGO Hanford, LIGO Livingston & Virgo
Gravitational Wave
Sky Coordinates
13h 09m 48.08s · -23° 22' 53.3"
Luminosity Distance
130 Million ly (40 Mpc)
Constellation
Hydra (NGC 4993)
Redshift
z = 0.0097

First Multi-Messenger Binary Neutron Star Merger & Kilonova

The foundational milestone of modern multi-messenger astronomy. The coalescence of two neutron stars was detected in gravitational waves, followed 1.7 seconds later by a short gamma-ray burst (GRB 170817A) detected by Fermi-GBM and INTEGRAL, and subsequently identified across the entire electromagnetic spectrum in host galaxy NGC 4993 as kilonova AT 2017gfo.

Fermi GBM / INTEGRAL Swope 1m / Magellan Chandra X-ray Observatory
GW190521
LIGO Hanford, LIGO Livingston & Virgo
Gravitational Wave
Sky Coordinates
12h 49m 36.0s · -26° 48' 00"
Luminosity Distance
17.3 Billion ly (5.3 Gpc)
Constellation
Coma Berenices / Virgo
Redshift
z = 0.8200

Intermediate-Mass Black Hole Formation in the Pair-Instability Gap

A short-duration gravitational wave burst (approx. 0.1 seconds) resulting from the collision of two massive black holes of 85 M☉ and 66 M☉. The primary black hole fell directly inside the pair-instability supernova mass gap, where stellar core-collapse theoretically cannot produce remnants. The remnant was a 142 M☉ intermediate-mass black hole.

ZTF Fermi LAT
FRB 20220610A
ASKAP (Australian Square Kilometre Array Pathfinder)
Fast Radio Burst
Sky Coordinates
21h 22m 57.0s · -45° 24' 30"
Luminosity Distance
8.0 Billion ly (z = 1.016)
Constellation
Grus
Redshift
z = 1.0160

Record-Breaking Cosmological Burst at Redshift z = 1.016

FRB 20220610A is the most distant and energetic fast radio burst ever recorded. Detected by ASKAP in Western Australia, its extreme dispersion measure (DM = 1458.1 pc cm⁻³) pointed to a deep cosmological origin. Follow-up imaging with ESO's Very Large Telescope (VLT) localized the burst to a dense group of at least five interacting galaxies 8 billion light-years away.

ESO VLT (FORS2) Hubble Space Telescope ATCA
FRB 200428
CHIME/FRB & STARE2
Fast Radio Burst
Sky Coordinates
19h 34m 55.5s · +21° 53' 47"
Luminosity Distance
30,000 ly (9.0 kpc)
Constellation
Vulpecula (SGR 1935+2154)
Redshift
z = 0.0000

First Galactic FRB: Direct Magnetar Engine Confirmation

A paradigm-shifting event in transient astrophysics. FRB 200428 was detected by CHIME and STARE2 originating from the active Galactic magnetar SGR 1935+2154 inside the Milky Way (approx. 30,000 light-years away). Simultaneous hard X-ray bursts observed by HXMT, INTEGRAL, and Konus-Wind proved beyond doubt that magnetars are capable of producing FRB-scale coherent radio emissions.

Insight-HXMT INTEGRAL (IBIS) FAST 500m Telescope
FRB 20121102A
Arecibo Observatory / Karl G. Jansky VLA
Fast Radio Burst
Sky Coordinates
05h 33m 06.0s · +33° 08' 50"
Luminosity Distance
3.0 Billion ly (z = 0.193)
Constellation
Auriga
Redshift
z = 0.1930

The Original Repeating FRB with Extreme Faraday Magneto-Ionic Medium

FRB 20121102A was the first repeating fast radio burst ever discovered, shattering the theory that all FRBs are cataclysmic one-off events. Localized by the VLA to a low-mass, low-metallicity dwarf galaxy at z = 0.193, it exhibits one of the highest Faraday rotation measures ever observed (|RM| ~ 10^5 rad m⁻²), pointing to an environment near a massive black hole or dense supernova remnant.

EVN (European VLBI) Gemini North Chandra / XMM-Newton
GRB 221009A
Fermi GBM, Swift BAT & LHAASO
Gamma-Ray Burst
Sky Coordinates
19h 13m 03.5s · +19° 48' 35"
Luminosity Distance
2.4 Billion ly (z = 0.151)
Constellation
Sagitta
Redshift
z = 0.1510

"The BOAT": Brightest Of All Time 18-TeV Cosmological Monster

GRB 221009A was an unprecedented, once-in-10,000-years cosmological blast. Emitting an isotropic-equivalent energy E_iso exceeding 10^55 ergs, the burst completely saturated space-based detectors, perturbed Earth's ionosphere at 500 km altitude, and generated the highest-energy photon ever observed from a GRB: a staggering 18 TeV photon detected by LHAASO in China.

JWST (NIRSpec / MIRI) LHAASO Water Cherenkov ALMA
GRB 230307A
Fermi GBM & GECAM-B
Gamma-Ray Burst
Sky Coordinates
04h 03m 49.0s · -75° 22' 41"
Luminosity Distance
950 Million ly (z = 0.065)
Constellation
Mensa
Redshift
z = 0.0650

Second-Brightest Burst in 50 Years Unveils Heavy Elements (Tellurium)

GRB 230307A was an exceptionally bright burst lasting ~200 seconds, which traditionally classified it as a long-duration core-collapse burst. However, follow-up observations with JWST detected a kilonova signature and the unmistakable spectroscopic fingerprint of tellurium (atomic mass 130), proving it originated from a neutron star merger that synthesized heavy r-process elements.

JWST (NIRCam / NIRSpec) Hubble Space Telescope Chandra X-ray
GRB 211211A
Swift BAT & Fermi GBM
Gamma-Ray Burst
Sky Coordinates
14h 09m 30.0s · +27° 53' 10"
Luminosity Distance
1.1 Billion ly (z = 0.076)
Constellation
Boötes
Redshift
z = 0.0760

Long GRB with Kilonova Challenges Classical Burst Classification

For five decades, gamma-ray bursts were divided into short (< 2s, mergers) and long (> 2s, massive star collapse). GRB 211211A completely overturned this dogma: lasting 51.4 seconds, its optical and near-infrared afterglow revealed an excess of luminosity caused by a kilonova fueled by radioactive decay of neutron-rich matter, proving a compact binary merger can produce minute-long gamma emission.

HST & Nordic Optical Telescope Swift XRT
SN 2023ixf
Zwicky Transient Facility (ZTF) / Itagaki
Supernova / Optical
Sky Coordinates
14h 03m 38.56s · +54° 18' 56.4"
Luminosity Distance
21 Million ly (6.4 Mpc)
Constellation
Ursa Major (Messier 101)
Redshift
z = 0.0008

Closest Core-Collapse Supernova in a Decade in Pinwheel Galaxy (M101)

SN 2023ixf was a brilliant Type II supernova discovered in the spiral arms of Messier 101 (The Pinwheel Galaxy) at a distance of only 21 million light-years. Early "flash spectroscopy" during the first 24 hours revealed intense, narrow emission lines indicating the shock breakout was plowing into dense circumstellar material ejected by the red supergiant progenitor just months before detonation.

Keck Observatory (LRIS) Swift UVOT / XRT VLA & NOEMA
AT 2022cmc
Zwicky Transient Facility (ZTF)
Tidal Disruption Event
Sky Coordinates
13h 34m 58.5s · +33° 09' 54"
Luminosity Distance
8.5 Billion ly (z = 1.193)
Constellation
Canes Venatici
Redshift
z = 1.1930

Relativistic Jet Launched by Supermassive Black Hole Shredding a Star

AT 2022cmc is one of only four confirmed relativistic Tidal Disruption Events (TDEs) ever observed. Discovered as an extremely luminous, rapidly fading optical transient by ZTF, extensive multi-wavelength follow-up revealed a supermassive black hole at z = 1.193 that disrupted a star and launched a relativistic Doppler-boosted jet pointing almost directly at Earth.

ESO VLT (X-shooter) NICER & Swift XRT NOEMA & VLA
SN 2024ggi
ATLAS (Asteroid Terrestrial-impact Last Alert System)
Supernova / Optical
Sky Coordinates
11h 18m 16.1s · -32° 50' 20"
Luminosity Distance
22 Million ly (6.7 Mpc)
Constellation
Hydra (NGC 3621)
Redshift
z = 0.0024

Core-Collapse Supernova in Nearby Spiral NGC 3621 in Hydra

Discovered in the spiral galaxy NGC 3621 at approximately 22 million light-years, SN 2024ggi offered astronomers a rare close-up look at the terminal demise of a massive star. Prompt spectroscopic follow-up detected early circumstellar flash signatures that rapidly evolved into a classical Type II plateau as the expanding hydrogen envelope expanded and cooled.

SALT (South African Large Telescope) Swift UVOT
IceCube-170922A
IceCube Neutrino Observatory (South Pole, Antarctica)
High-Energy Neutrino
Sky Coordinates
05h 09m 43.2s · +05° 43' 12"
Luminosity Distance
4.0 Billion ly (z = 0.3365)
Constellation
Orion (TXS 0506+056)
Redshift
z = 0.3365

Historical First Neutrino-Blazar Association: 290 TeV Track from TXS 0506+056

On September 22, 2017, IceCube detected a single through-going muon neutrino track with a deposited energy of ~290 TeV. An automated alert was routed worldwide in under 43 seconds. Telescopes following the alert found that the blazar TXS 0506+056 (at z = 0.3365, 4 billion light-years) was undergoing its most energetic gamma-ray flaring state in a decade, marking the first confirmed astrophysical neutrino point source.

Fermi LAT MAGIC Cherenkov Telescopes VLA & OVRO
IceCube-230712A
IceCube Neutrino Observatory (South Pole)
High-Energy Neutrino
Sky Coordinates
12h 34m 28.8s · +12° 21' 00"
Luminosity Distance
Cosmological / PeV Scale
Constellation
Virgo
Redshift
Galactic / Local

Gold-Quality High-Energy Starting Track Triggering Multi-Messenger Search

A high-confidence "Gold" alert issued by IceCube with an estimated signalness probability of 89% (sub-millimeter track originating within the Antarctic ice volume). Emitting a deposited energy of ~185 TeV, the event triggered multi-wavelength ground and space-based follow-up campaigns from Fermi, Swift, and optical survey telescopes to search for coincident flaring active galactic nuclei.

Swift XRT Fermi LAT ZTF