STARITHM
High-confidence FRB detected by CHIME with dispersion measure of 580.3 pc/cm³
AI Summary
CHIME/FRB Real-time Search Pipeline detected a fast radio burst (FRB) on 2026-10-04 at 02:01:15.884 UTC with exceptional significance (importance: 0.9999). The burst exhibits a dispersion measure of 580.28 ± 0.40 pc/cm³, substantially exceeding the maximum Galactic contribution (84.30 pc/cm³), indicating an extragalactic origin. The event was localized to RA 282.28°, Dec 37.57° with ~0.47° uncertainty and achieved a signal-to-noise ratio of 28.4 across the 400-800 MHz band. No follow-up observations or additional circulars have been reported at this time.
Measurements
| Event ID | 1180170936 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Sun, 04 Oct 2026 02:01:15 GMT |
| Right ascension (J2000) | 282.2810503° |
| Declination (J2000) | 37.5737649° |
| Dispersion measure | 580.2770996 pc/cm³ |
| SNR | 28.4147625 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Sun, 04 Oct 2026 02:01:15 GMT
AI summary generated Sun, 04 Oct 2026 19:26:43 GMT.