STARITHM
A gamma-ray burst detected by Fermi GBM with high significance, likely from an AGN.
AI Summary
The event triggered the Fermi GBM at 2026-09-16T15:11:04.34Z with a significant burst intensity. Classification suggests it is most likely associated with an Active Galactic Nucleus (AGN) with a probability of 98%. No additional follow-up observations have been reported.
Measurements
| Event | GRB 260916B |
|---|---|
| Event ID | 811264269 |
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Wed, 16 Sep 2026 15:11:04 GMT |
| Right ascension (J2000) | 352.6° |
| Declination (J2000) | -35.7° |
| Position error radius | 4.6° (4.60°) |
| Position from | Fermi-GBM position, GCN 45614 |
| GCN notices | 7 |
| GCN circulars | 7 |
Every localisation reported in Circulars (2)
| Instrument | Of | Error | Circular |
|---|---|---|---|
| Fermi-GBM | burst | 4.60° (1-sigma statistical) | GCN 45614 |
| Fermi-GBM | burst | 4.60° (1-sigma statistical) | GCN 45616 |
Observations (15)
Values parsed from the Circular text; each row names its Circular.
| Time since trigger | Band | Value | Telescope | Circular |
|---|---|---|---|---|
| T+47 min | C | > 20 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+47 min | C | > 19.5 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+48 min | C | > 20 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+48 min | C | > 19.2 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+50 min | C | > 19.2 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+51 min | C | > 19 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+52 min | C | > 19.5 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+52 min | C | > 19 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+53 min | C | > 18.6 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+54 min | C | > 18.6 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+55 min | C | > 18.5 mag (limit) | MASTER-OAFA | GCN 45591 |
| T+4.6 h | white | > 18.1 mag (limit) | MASTER-Tavrida | GCN 45599 |
| T+4.6 h | C | > 18 mag (limit) | MASTER-Tavrida | GCN 45599 |
| T+4.6 h | C | > 17.1 mag (limit) | MASTER-Tavrida | GCN 45599 |
| T+4.7 h | C | > 18.1 mag (limit) | MASTER-Tavrida | GCN 45599 |
Notices (1)
Fermi GBM — GRB · Wed, 16 Sep 2026 15:11:04 GMT
GCN Circulars (7)
GCN-45636 — GRB 260916B
· Fri, 18 Sep 2026 16:14:18 GMT
nap
GCN-45633 — GRB 260916B
· Fri, 18 Sep 2026 14:13:27 GMT
The Glowbug gamma-ray telescope on the International Space Station detected a short gamma-ray burst (GRB 260916B) on September 16, 2026, with a duration of 0.16 seconds and a significance of 31.5 sigma. This burst was also detected by other observatories including Fermi/GBM, Konus-Wind, and Mars-Odyssey.
GCN-45630 — GRB 260916B
· Fri, 18 Sep 2026 13:48:49 GMT
{"summary": "The short-duration Gamma-Ray Burst (GRB) 260916B was detected by Fermi, Konus-Wind, and Mars-Odyssey at 15:11:04 UT on 26 September 2018. The event was triangulated to a preliminary error box with coordinates centered at RA 23h 07m 28s and Dec -32d 30' 34",", "
GCN-45616 — GRB 260916B
· Thu, 17 Sep 2026 18:52:29 GMT
nap
GCN-45614 — GRB 260916B
· Thu, 17 Sep 2026 17:03:03 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely short gamma-ray burst (GRB 260916B) on September 16, 2026, at 15:11:04.34 UT, with a calculated location of RA = 352.6, Dec = -35.7 (J2000) and a statistical uncertainty of 4.6 degrees. The event is significant for further study due to its potential to provide insights into high-energy astrophysical phenomena.
GCN-45599 — GRB260916
· Wed, 16 Sep 2026 20:31:17 GMT
nap
GCN-45591 — GRB260916
· Wed, 16 Sep 2026 09:51:37 GMT
The MAXI GRB260916.37 gamma-ray burst was detected on September 16, 2026, at 09:38:52 UT. Observations by the MASTER-OAFA robotic telescope began 2813 seconds after the trigger, with upper magnitude limits reported up to 20.0 mag.
AI summary generated Wed, 16 Sep 2026 16:38:43 GMT.