General information
GRB 260304A was reported by AstroSat CZTI as a clearly detected long-duration gamma-ray burst, also stated to be detected by Konus-Wind (private communication). The prompt emission shows multiple peaks with reported strongest-peak times in two AstroSat detector systems.
Wavelength coverage
- Gamma-ray / hard X-ray (20–200 keV): Detected by AstroSat CZTI.
- Gamma-ray (100–500 keV): Detected by AstroSat CZTI CsI anticoincidence (Veto) detector.
No observations are mentioned at optical, infrared, ultraviolet, radio, soft X-ray, or TeV energies.
Lightcurve and spectrum
- 20–200 keV (CZTI): multiple peaks; strongest peak at 2026-03-04 07:25:02.120 UTC; peak count rate 121 (+29, -16) counts/s above background; total 1569 (+602, -342) counts; background 142 (+2, -3) counts/s; T90 = 32 (+23, -9) s.
- 100–500 keV (Veto/CsI): multiple peaks; strongest peak at 2026-03-04 07:24:50.186 UTC; peak count rate 298 (+72, -28) counts/s above background; total 2770 (+533, -517) counts; background 1221 (+5, -4) counts/s; T90 = 31 (+3, -6) s.
Redshift
What’s special vs typical