General information
GRB 260830A is a long-duration gamma-ray burst detected around 2026-08-30T19:32:13 UTC by multiple high-energy instruments. GECAM-B reported an on-ground localization at RA 245.5 deg, Dec -61.1 deg with a 3.4 deg 1-sigma statistical error.
Wavelength coverage
- Gamma-ray / hard X-ray: NuSTAR SINGS detected prompt emission in the CsI anti-coincidence shields, Insight-HXMT/HE detected the burst in CsI detectors over about 60-900 keV deposited energy, and GECAM-B detected it in about 70-6000 keV.
- Gamma-ray: Konus-Wind detection is mentioned via GCN notices.
No observations are mentioned in optical, near-infrared, ultraviolet, radio, soft X-ray afterglow, neutrino, or gravitational-wave bands.
Lightcurve and spectrum
- NuSTAR detected a single episode with two peaks lasting about 10 s, with peak count rate about 1500 cps over a baseline of about 1000 cps.
- NuSTAR reports no evidence for signal above 100 keV in the CZT detectors.
- Insight-HXMT/HE reports multiple pulses with T90 = 9 +7/-3 s, a 1 s peak rate of 552 counts/s at T0+5.5 s, and 3815 total counts.
- GECAM-B reports multiple pulses with T90 = 11 +/- 1 s.
- GECAM-B reports a time-averaged spectrum from T0-5.0 to T0+10.0 s best fit by a cutoff power law with index -1.13 +0.30/-0.28 and Epeak = 190 +23/-14 keV.
- GECAM-B reports 10-1000 keV fluence of (1.85 +0.25/-0.18)E-05 erg/cm^2.
Redshift
What’s special vs typical