STARITHM
High-confidence FRB detected by CHIME with DM=507.49 pc/cm³
AI Summary
CHIME/FRB Real-time Search Pipeline detected a fast radio burst (FRB 1178780473) on 2026-09-28 at 10:13:54.314 UTC with exceptional signal-to-noise ratio of 46.8. The burst exhibits a dispersion measure of 507.49±0.40 pc/cm³, significantly exceeding the Galactic maximum (70.99 pc/cm³), indicating an extragalactic origin. The event was localized to RA=40.85°, Dec=35.91° with ~0.30° positional uncertainty across the 400-800 MHz band. No follow-up observations or human-written circulars have been reported.
Measurements
| Event ID | 1178780473 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Mon, 28 Sep 2026 10:13:54 GMT |
| Right ascension (J2000) | 40.8520932° |
| Declination (J2000) | 35.9110525° |
| Dispersion measure | 507.4897156 pc/cm³ |
| SNR | 46.7955132 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Mon, 28 Sep 2026 10:13:54 GMT
AI summary generated Mon, 28 Sep 2026 19:17:02 GMT.