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 ⚡

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)

Order:

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