General information
GRB 260614B is a likely long-duration GRB triggered on 2026-06-14 around 13:49:53–13:49:55 UTC by Fermi/GBM and SVOM/ECLAIRs, with additional detections reported by SVOM/GRM, GECAM-B, and NuSTAR shields. A precise optical position from SVOM/VT is RA=353.90883 deg, Dec=-54.11628 deg (0.50 arcsec uncertainty), with X-ray counterparts reported by SVOM/MXT and EP-FXT.
Wavelength coverage
- Gamma-ray / hard X-ray: Fermi/GBM detection and spectral/fluence measurements; SVOM/ECLAIRs and SVOM/GRM trigger and refined prompt analysis; GECAM-B prompt spectrum/fluence; NuSTAR CsI anti-coincidence shield prompt detection.
- X-ray: SVOM/MXT onboard detection of an uncatalogued X-ray source; EP-FXT follow-up detection with average unabsorbed 0.5–10 keV flux.
- Optical: SVOM/VT candidate confirmed as optical afterglow with multi-epoch VT_B and VT_R photometry and a fading slope.
- Radio: ATCA observations at 6.4 and 11.5 days post-burst with 8 GHz non-detection and 3-sigma upper limits.
No UV, IR, or spectroscopy observations are mentioned.
Lightcurve and spectrum
Redshift
What’s special vs typical
GCN 45063: GRB 260614B: ATCA Radio Upper Limits
2026-07-01T14:14:22.077Z | rev 0
GCN 45019: GRB 260614B: EP-FXT follow-up observation
2026-06-22T22:10:22.675Z | rev 0
GCN 44986: GRB 260614B: NuSTAR detection of prompt emission
2026-06-19T03:32:52.220Z | rev 0
GCN 44947: GRB 260614B: SVOM/ECLAIRs refined analysis
2026-06-15T21:03:45.885Z | rev 0
2026-06-15T08:39:27.552Z | rev 0
GCN 44943: GRB 260614B: SVOM/VT optical afterglow confirmation
2026-06-15T01:08:34.314Z | rev 2
GCN 44943: GRB 260614B: SVOM/VT optical observations
2026-06-15T01:08:34.314Z | rev 0
GCN 44942: GRB 260614B: Fermi GBM Observation
2026-06-14T21:57:48.424Z | rev 0
GCN 44939: GRB 260614B: SVOM/VT optical candidate from VHF data
2026-06-14T15:06:45.895Z | rev 0
GCN 44938: GRB 260614B: SVOM detection of a burst
2026-06-14T14:17:03.481Z | rev 0
GCN 44938: GRB 260614B: SVOM detection of a burst
2026-06-14T14:17:03.481Z | rev 2
GCN 44937: GRB 260614B: Fermi GBM Final Real-time Localization
2026-06-14T13:57:42.070Z | rev 0