STARITHM
Short, faint gamma-ray burst GRB 261104A detected by SVOM/ECLAIRs.
AI Summary
GRB 261104A was detected on Nov 4, 2026, with a signal-to-noise ratio of 8.02 in the [5-20] keV band. It lasted about 40 seconds and was localized to R.A. 0h25m11.98s, Dec. -54d27m40.50s within a radius of 9.81 arcmin. Follow-up observations by SVOM's MXT and VT instruments are ongoing.
Measurements
| Event | GRB 261104A |
|---|---|
| Event ID | sb26110402 |
| Source | SVOM |
| Alert type | GRB |
| Significance | high |
| Trigger time (UTC) | Wed, 04 Nov 2026 20:36:31 GMT |
| Right ascension (J2000) | 6.2999° |
| Declination (J2000) | -54.4612° |
| Position error radius | 0.1635° (9.8′) |
| Position from | notice svom.voevent.eclairs |
| GCN notices | 1 |
| GCN circulars | 2 |
Observations (1)
Values parsed from the Circular text; each row names its Circular.
| Time since trigger | Band | Value | Telescope | Circular |
|---|---|---|---|---|
| T+80 min | SDSS r | > 22.31 AB mag (limit) | LCO 1m | GCN 46154 |
Notices (1)
SVOM — GRB · Wed, 04 Nov 2026 20:36:31 GMT
GCN Circulars (2)
GCN-46154 — GRB 261104A
· Thu, 05 Nov 2026 01:30:27 GMT
The SVOM mission team observed the field of GRB 261104A using the LCO 1m telescope but did not detect any new source within the error box, setting an optical upper limit of r > 22.31 AB (5-sigma) 1.33 hours after the trigger. This non-detection provides constraints on the optical afterglow of the gamma-ray burst.
GCN-46150 — GRB 261104A
· Wed, 04 Nov 2026 21:03:59 GMT
The SVOM/ECLAIRs instrument detected a short, faint gamma-ray burst (GRB 261104A) on November 4, 2026, at 20:36:44 UTC. The burst, which lasted approximately 40 seconds, was localized to the coordinates R.A. 0h25m11.98s, Dec. -54d27m40.50s with a 90% confidence level radius of 9.81 arcmin. The SVOM spacecraft slewed to the burst, and follow-up observations by MXT and VT instruments are underway.
AI summary generated Thu, 05 Nov 2026 00:00:12 GMT.