STARITHM
CHIME detects Fast Radio Burst with DM 894.07 pc/cm³ at high significance
AI Summary
CHIME/FRB Real-time Search Pipeline identified a Fast Radio Burst (FRB) on 2026-09-28 at 23:48:24 UTC with an importance score of 0.9999, indicating high confidence in detection. The burst exhibits a dispersion measure of 894.07±0.40 pc/cm³, significantly exceeding the Galactic maximum of 36.61 pc/cm³, suggesting an extragalactic origin. Localized to RA 243.66°, Dec 53.64° with ~0.77° positional uncertainty, the event was detected across the 400-800 MHz band with SNR 13.3. No follow-up observations or additional circulars have been reported at this time.
Measurements
| Event ID | 1178872625 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Mon, 28 Sep 2026 23:48:24 GMT |
| Right ascension (J2000) | 243.6565997° |
| Declination (J2000) | 53.6434818° |
| Dispersion measure | 894.0715332 pc/cm³ |
| SNR | 13.3213778 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Mon, 28 Sep 2026 23:48:24 GMT
AI summary generated Tue, 29 Sep 2026 01:18:23 GMT.