STARITHM
CHIME detects Fast Radio Burst with DM 719.4 pc/cm³ at high significance
AI Summary
CHIME/FRB Real-time Search Pipeline detected FRB 1181397151 on 2026-10-11 at 23:51:31 UTC with a signal-to-noise ratio of 14.75 and high importance score (0.9999). The burst exhibits a dispersion measure of 719.38±0.40 pc/cm³, significantly exceeding the maximum Galactic contribution (43.59 pc/cm³), indicating an extragalactic origin. The source is localized to RA 258.12°, Dec 39.24° (±0.57° uncertainty) in the 400-800 MHz band. No follow-up observations or additional circulars have been reported at this time.
Measurements
| Event ID | 1181397151 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Sun, 11 Oct 2026 23:51:31 GMT |
| Right ascension (J2000) | 258.1166162° |
| Declination (J2000) | 39.2372194° |
| Dispersion measure | 719.3818359 pc/cm³ |
| SNR | 14.7520514 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Sun, 11 Oct 2026 23:51:31 GMT
AI summary generated Mon, 12 Oct 2026 10:43:46 GMT.