General information
GRB 260323A was triggered by Fermi/GBM at 2026-03-23 23:51:27 UT and is reported as a likely LONG GRB. The on-ground GBM localization is RA=100.1 deg, Dec=-77.1 deg (J2000) with 5.5 deg statistical uncertainty.
Wavelength coverage
- Gamma-ray: Detected and localized by Fermi/GBM; reported angle from Fermi/LAT boresight 149.0 deg.
- Optical: MASTER-OAFA began observations 173 s after trigger, reporting only upper limits in clear (unfiltered) band.
No X-ray, UV, IR, radio, neutrino, or GW observations are mentioned in the provided circulars.
Lightcurve and spectrum
- Optical (clear/unfiltered): Upper limits of 18.8, 18.9, 19.2, 19.3 mag at Tmid-T0 = 188, 229, 280, 341 s; and 20.1 mag at Tmid-T0 = 650 and 786 s.
Redshift
What’s special vs typical