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GRB 261029B detected by Fermi GBM and AstroSat CZTI.
AI Summary
A short gamma-ray burst (GRB 261029B) was detected by the Fermi Gamma-ray Burst Monitor (GBM) and independently confirmed by the AstroSat CZTI. The GBM localized it to RA = 48.5, Dec = 4.3 with a statistical uncertainty of 9.4 degrees, while CZTI measured a peak count rate of 452 counts/s and T90 duration of 0.72 seconds.
Measurements
| Event ID | 814933455 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Thu, 29 Oct 2026 02:24:10 GMT |
| Right ascension (J2000) | 48.46° |
| Declination (J2000) | 4.3° |
| Position error radius | 9.42° |
| GCN notices | 4 |
| GCN circulars | 2 |
Notices (1)
Fermi GBM — GRB · Thu, 29 Oct 2026 02:24:10 GMT
GCN Circulars (2)
GCN-46091 — GRB 261029B
· Thu, 29 Oct 2026 13:57:56 GMT
A gamma-ray burst, GRB 261029B, was detected by the AstroSat CZTI instrument on October 29, 2026, at 02:24:10.84 UTC, with a peak count rate of 452 counts/s and a duration (T90) of 0.72 seconds. This event was also detected by the Fermi Gamma-ray Burst Monitor.
GCN-46075 — GRB 261029B
· Thu, 29 Oct 2026 02:34:51 GMT
The Fermi Gamma-ray Burst Monitor (GBM) detected a likely short gamma-ray burst (GRB 261029B) on October 29, 2026, at 02:24:10 UT. The event was located at RA = 48.5, Dec = 4.3 (J2000) with a statistical uncertainty of 9.4 degrees.
AI summary generated Thu, 29 Oct 2026 19:06:44 GMT.