Fermi GBM detects likely short GRB 260802B with uncertain localization.
AI Summary
On August 2, 2026, Fermi GBM detected a short gamma-ray burst (GRB 260802B) with a likely astrophysical origin but poorly localized at RA = 313.40, Dec = -18.52 (statistical uncertainty of 29.68 degrees). Follow-up optical observations by the MASTER-SAAO and OAFA telescopes did not detect any significant optical transient within the error box.
Measurements
| Event ID | 807353993 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | medium |
| Trigger time (UTC) | Sun, 02 Aug 2026 08:59:48 GMT |
| Right ascension (J2000) | 313.4° |
| Declination (J2000) | -18.52° |
| Position error radius | 29.68° |
| GCN notices | 5 |
| GCN circulars | 2 |
Notices (1)
Fermi GBM — GRB · Sun, 02 Aug 2026 08:59:48 GMT
GCN Circulars (2)
GCN-45278 — GRB 260802B
· Mon, 03 Aug 2026 06:45:36 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a gamma-ray burst (GRB) designated Fermi GRB 260802B. Observations by the MASTER-SAAO and MASTER-OAFA robotic telescopes began approximately 37,429 seconds and 71,774 seconds after the trigger time, respectively, with upper magnitude limits up to 20.5. The observations did not detect any significant optical transient within the error box.
GCN-45273 — GRB 260802B
· Sun, 02 Aug 2026 11:25:15 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely short gamma-ray burst (GRB 260802B) on August 2, 2026, at 08:59:48.38 UT. The event was localized to RA = 313.40, Dec = -18.52 (J2000) with a statistical uncertainty of 29.68 degrees.
AI summary generated Sun, 09 Aug 2026 02:33:36 GMT.