EventsCirculars
Event: GRB 260504BAbout

GRB 260504B

Summary

General information

GRB 260504B triggered SVOM/ECLAIRs at 2026-05-04T09:31:19 UTC and is a short, single-pulse gamma-ray burst confirmed by multiple high-energy instruments. SVOM provided an initial localization at RA=351.2451 deg, Dec=-80.3291 deg with a 90% containment radius of 4.91 arcmin.

Wavelength coverage

Lightcurve and spectrum

Redshift

What’s special vs typical

Circulars [all]

GCN 44487: GRB 260504B: AstroSat CZTI detection
2026-05-07T14:19:14.946Z | rev 0
GCN 44486: GRB 260504B: SVOM/ECLAIRs refined analysis
2026-05-06T16:54:33.289Z | rev 0
GCN 44477: GRB 260504B: SVOM/VT optical upper limits
2026-05-05T15:53:02.831Z | rev 0
GCN 44474: Konus-Wind detection of GRB 260504B (short/hard)
2026-05-05T14:25:39.233Z | rev 0
GCN 44473: GRB 260504B: GECAM-B detection
2026-05-05T13:41:13.177Z | rev 0
GCN 44470: GRB 260504B: SVOM/GRM spectral analysis
2026-05-05T12:31:40.273Z | rev 2
GCN 44470: GRB 260504B: SVOM/GRM spectral analysis
2026-05-05T12:31:40.273Z | rev 0
GCN 44468: GRB 260504B: SVOM/MXT refined analysis and potential detection
2026-05-05T09:32:52.404Z | rev 0
GCN 44467: GRB 260504B: EP-FXT upper limit
2026-05-05T04:30:12.334Z | rev 0
GCN 44460: GRB 260504B: REM optical/NIR observations
2026-05-04T15:24:20.152Z | rev 0
GCN 44457: GRB 260504B: AST3-2 i-band upper limit
2026-05-04T15:02:23.598Z | rev 0
GCN 44456: GRB 260504B: LCO z-band upper limit
2026-05-04T10:38:06.298Z | rev 0
GCN 44456: GRB 260504B: LCO z-band upper limit
2026-05-04T10:38:06.298Z | rev 3
GCN 44456: GRB 260504B: LCO z-band upper limit
2026-05-04T10:38:06.298Z | rev 2
GCN 44455: SVOM GRB 260504B: MASTER-OAFA optical observations
2026-05-04T10:30:53.509Z | rev 0
GCN 44454: GRB 260504B: SVOM detection of a short burst
2026-05-04T10:00:59.104Z | rev 0
GCN 44454: GRB 260504B: SVOM detection of a short burst
2026-05-04T10:00:59.104Z | rev 2