STARITHM
CHIME detects Fast Radio Burst with DM 448.45 pc/cm³ at high significance
AI Summary
CHIME/FRB Real-time Search Pipeline detected FRB 1178916974 on 2026-09-29 at 04:11:43 UTC with a signal-to-noise ratio of 13.23 and high importance score (0.9999). The burst exhibits a dispersion measure of 448.45±0.41 pc/cm³, significantly exceeding the maximum Galactic contribution (117.21 pc/cm³), confirming extragalactic origin. The source is localized to RA 310.26°, Dec 60.94° with ~0.94° uncertainty, observed in the 400-800 MHz band. No follow-up observations or additional circulars are currently available.
Measurements
| Event ID | 1178916974 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Tue, 29 Sep 2026 04:11:43 GMT |
| Right ascension (J2000) | 310.2592979° |
| Declination (J2000) | 60.9368386° |
| Dispersion measure | 448.4510803 pc/cm³ |
| SNR | 13.2337933 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Tue, 29 Sep 2026 04:11:43 GMT
AI summary generated Tue, 29 Sep 2026 07:18:39 GMT.