General information
GRB 260103A triggered SVOM/GRM at 2026-01-03T01:46:54 UTC and was also detected by GECAM-B and Insight-HXMT/HE, with all teams reporting a multi-pulsed, long-GRB-like event. The SVOM team noted the burst occurred near the end of a C-class solar flare, so a solar origin cannot be excluded.
Wavelength coverage
- Gamma-rays: Detected by SVOM/GRM (15–5000 keV), GECAM-B (
70–6000 keV), and Insight-HXMT/HE (60–900 keV deposited; >~200 keV penetrating events).
No observations were mentioned in X-ray, UV, optical/NIR, radio, or TeV/GeV bands.
Lightcurve and spectrum
- SVOM/GRM: Multiple pulses; T90 = 8.0 (+3.8/-1.8) s in 15–5000 keV.
- GECAM-B: Multiple pulses; T90 = 9.0 (+7.0/-3.6) s in ~70–6000 keV; on-ground localization RA=269.0 deg, Dec=46.7 deg, 1σ stat. err=4.6 deg.
- Insight-HXMT/HE: Multiple pulses; T90 = 4.6 (+1.8/-1.0) s; 1 s peak rate 1848 cnt/s (from T0−0.25 s); total counts 4704.
Redshift
What’s special vs typical
- The burst timing overlapped the end of a C-class solar flare, and a solar-flare origin was explicitly stated as a possibility despite otherwise GRB-like properties.