STARITHM
CHIME detects Fast Radio Burst with high significance and extragalactic dispersion measure
AI Summary
CHIME/FRB Real-time Search Pipeline detected FRB 1178995793 on 2026-09-29 at 17:49:58.419 UTC with a signal-to-noise ratio of 14.6 and high importance score (0.993). The burst exhibits a dispersion measure of 78.04 pc/cm³ (±0.40), significantly exceeding the maximum Galactic contribution (39.85 pc/cm³), confirming extragalactic origin. The source is localized to RA 155.27°, Dec 1.35° with ~0.67° positional uncertainty, observed across the 400-800 MHz band. No follow-up observations or additional circulars have been reported at this time.
Measurements
| Event ID | 1178995793 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Tue, 29 Sep 2026 17:49:58 GMT |
| Right ascension (J2000) | 155.2721565° |
| Declination (J2000) | 1.3515432° |
| Dispersion measure | 78.0442352 pc/cm³ |
| SNR | 14.6006241 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Tue, 29 Sep 2026 17:49:58 GMT
AI summary generated Tue, 29 Sep 2026 19:19:51 GMT.