GRB 260228A

General information

GRB 260228A triggered SVOM/ECLAIRs at 2026-02-28T20:55:55 UTC (T0), with refined prompt-emission analysis later reported by the ECLAIRs team. Einstein Probe/FXT follow-up detected multiple X-ray sources in the localization region, with the brightest confirmed as the GRB afterglow via clear fading between epochs.

Wavelength coverage

• Gamma/X-ray (prompt): SVOM/ECLAIRs reports T90 values and a broken power-law spectral fit with measured fluence.
• X-ray (afterglow): EP/FXT detects multiple sources; the brightest fades by ~10× over 3.94 days, confirming the afterglow.
• Optical: SVOM/VT, SVOM/COLIBRÍ (DDRAGO), and CAHA/CAFOS report only upper limits with no uncatalogued transient detected.
• UV/optical: Swift/UVOT reports detections in white/u/v, but the circular text contains an inconsistent GRB designation. Bands with no observations mentioned: radio, infrared.

Lightcurve and spectrum

Redshift

What’s special vs typical