General information
GRB 260120A is a likely long gamma-ray burst detected on 2026-01-20 around 04:01:54–04:01:56 UTC by Fermi/GBM, GECAM-B, and AstroSat/CZTI. Fermi/GBM reports an on-ground localization at RA=345.9 deg, Dec=-24.7 deg (J2000) with 2.5 deg statistical uncertainty.
Wavelength coverage
- Gamma-rays / hard X-rays: Detected by Fermi/GBM (prompt emission and localization).
- Gamma-rays: Detected by GECAM-B in 70–6000 keV.
- Hard X-rays: Detected by AstroSat/CZTI in 20–200 keV; also seen in the CsI anticoincidence (Veto) in 100–500 keV.
No observations are mentioned in X-ray, UV, optical, IR, or radio bands.
Lightcurve and spectrum
- GECAM-B reports multiple pulses with T90 = 2.3 (+1.1/-0.7) s (70–6000 keV).
- AstroSat/CZTI reports a peak at 2026-01-20 04:01:55.50 UTC with a peak count rate of 264 (+132, -24) counts/s above background (20–200 keV) and T90 = 3.1 (+1.1, -0.8) s.
- AstroSat Veto reports a peak at 2026-01-20 04:01:54.79 UTC with a peak count rate of 246 (+62, -64) counts/s above background (100–500 keV) and T90 = 4.2 (+1.3, -1.5) s.
Redshift
What’s special vs typical