STATION 04 · MULTI-MESSENGER WIRE DOSSIER Tidal Disruption Event CONFIRMED

AT 2022cmc

“Relativistic Jet Launched by Supermassive Black Hole Shredding a Star”

Zwicky Transient Facility (ZTF) • Trigger: 2022-02-11 10:42:40 UTC

ASTROPHYSICAL LOCALIZATION & TELEMETRY

FRAME: ICRS / J2000

Sky Coordinates 13h 34m 58.5s +33° 09' 54" (203.74375°, 33.16500°)

Cosmological Redshift z = 1.1930 Luminosity Dist: 8.5 Billion ly (z = 1.193)

Constellation / Field Canes Venatici Host Field Environment

Detection Significance Relativistic Jet (Lorentz Factor Γ ~ 12) Multi-detector confidence

transient type

Relativistic Tidal Disruption Event (TDE)

peak optical mag

r ~ 16.5 mag (Extremely bright for z > 1)

xray luminosity

L_X > 10^45 erg/s (NICER / Swift / XMM)

black hole mass

~10^6 – 10^7 M☉

jet lorentz factor

Γ ≈ 12 (Directly aligned on-axis)

01 Scientific Overview & Source Physics

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.

02 Multi-Messenger Follow-Up Campaign Matrix

Observatory / Instrument	Spectral Regime	Observational Detection & Counterpart Findings
ESO VLT (X-shooter)	Optical/NIR Spectroscopy	Pinpointed absorption lines establishing cosmological redshift z = 1.193.
NICER & Swift XRT	X-ray	Monitored luminous synchrotron and inverse Compton X-ray emission for 100+ days.
NOEMA & VLA	Millimeter / Radio	Resolved self-absorbed synchrotron radio spectrum from relativistic blast wave.