STARITHM
Gamma-ray burst GRB 260917A detected with Fermi GBM.
AI Summary
The Fermi Gamma-ray Burst Monitor (GBM) detected a long-duration GRB 260917A on September 17, 2026. Initial localizations provided a right ascension of 310.2 degrees and a declination of -31.9 degrees with an estimated error radius. Follow-up observations by MASTER-OAFA placed an upper magnitude limit on the optical counterpart.
Measurements
| Event ID | 811304653 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Thu, 17 Sep 2026 02:24:08 GMT |
| Right ascension (J2000) | 311.6° |
| Declination (J2000) | -32.75° |
| Position error radius | 1.71° |
| GCN notices | 9 |
| GCN circulars | 3 |
Notices (1)
Fermi GBM — GRB · Thu, 17 Sep 2026 02:24:08 GMT
GCN Circulars (3)
GCN-45604 — GRB 260917A
· Thu, 17 Sep 2026 02:57:11 GMT
A gamma-ray burst, GRB 260917A, was detected by the Fermi Gamma-ray Burst Monitor on September 17, 2026. The BALROG algorithm localized the burst to a position with a right ascension of 310.2 degrees and a declination of -31.9 degrees, with an estimated error radius of 1.4 degrees (statistical) and 1 degree (systematic).
GCN-45603 — GRB 260917A
· Thu, 17 Sep 2026 02:34:35 GMT
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GCN-45602 — GRB260917
· Thu, 17 Sep 2026 02:31:10 GMT
The MASTER-OAFA robotic telescope in Argentina began observing the Fermi GRB260917.10 event 36 seconds after the alert, with an upper magnitude limit of 19.7. The observation was conducted under specific celestial conditions, including a zenith distance of 10 degrees and a sun altitude of -48.4 degrees.
AI summary generated Thu, 17 Sep 2026 04:39:35 GMT.