CHIME detects Fast Radio Burst with DM 596.86 pc/cm³ at high significance
AI Summary
CHIME/FRB Real-time Search Pipeline identified a fast radio burst (FRB) on 2026-07-23 at 20:44:49 UTC with a signal-to-noise ratio of 12.53 and high importance score (0.996). The burst was localized to RA 131.90°, Dec 27.56° with ~0.55° positional uncertainty, and exhibits a dispersion measure of 596.86 ± 1.62 pc/cm³ observed across the 400-800 MHz band. The dispersion measure significantly exceeds the Galactic maximum (49.29 pc/cm³), indicating an extragalactic origin. No follow-up observations or multi-wavelength detections have been reported to date.
Measurements
| Event ID | 1170888936 |
|---|---|
| Source | CHIME |
| Alert type | FRB |
| Significance | medium |
| Trigger time (UTC) | Thu, 23 Jul 2026 20:44:49 GMT |
| Right ascension (J2000) | 131.9001423° |
| Declination (J2000) | 27.5623486° |
| Dispersion measure | 596.8564453 pc/cm³ |
| SNR | 12.5259314 |
| GCN notices | 1 |
| GCN circulars | 0 |
Notices (1)
CHIME — FRB · Thu, 23 Jul 2026 20:44:49 GMT
AI summary generated Sat, 25 Jul 2026 09:48:05 GMT.