CHIME/FRB observation of a high activity state from a newly discovered repeating fast radio burst source FRB 20240316A
ATel #16734; Thomas Abbott (McGill University) on behalf of the CHIME/FRB Collaboration
on 26 Jul 2024; 02:30 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Thomas Abbott (thomas.abbott@mail.mcgill.ca)
Subjects: Radio, Transient, Fast Radio Burst
The CHIME/FRB Collaboration reports a sudden high activity state from a repeating source of fast radio bursts (FRB 20240316A).
Before this state of high activity, CHIME/FRB detected four bursts in November and December of 2023 and one in March of 2024.
However, since 2024-07-22 at 11:29:43 UTC, twenty-two bursts have been detected from the source, nine of which were broadcast through CHIMEâs Virtual Observatory Event Service.
Four bursts were detected in 6 minutes on 2024-07-22, five bursts were detected in 13 minutes on 2024-07-23, and thirteen bursts were detected in 18 minutes on 2024-07-24.
| TNS Name |
Time of Arrival (UTC) |
Signal-to-Noise Ratio |
| FRB 20240722A |
2024-07-22 11:35:08 |
8.5 |
| FRB 20240722B |
2024-07-22 11:33:27 |
16.9 |
| FRB 20240722C |
2024-07-22 11:30:43 |
13.0 |
| FRB 20240722D |
2024-07-22 11:29:44 |
10.1 |
| FRB 20240723A |
2024-07-23 11:28:42 |
12.6 |
| FRB 20240723B |
2024-07-23 11:32:06 |
9.3 |
| FRB 20240723C |
2024-07-23 11:33:16 |
9.0 |
| FRB 20240723D |
2024-07-23 11:35:02 |
14.8 |
| FRB 20240723E |
2024-07-23 11:41:20 |
8.4 |
| FRB 20240724A |
2024-07-24 11:27:40 |
8.9 |
| FRB 20240724B |
2024-07-24 11:18:06 |
10.3 |
| FRB 20240724C |
2024-07-24 11:34:10 |
9.5 |
| FRB 20240724D |
2024-07-24 11:22:38 |
13.0 |
| FRB 20240724E |
2024-07-24 11:25:05 |
9.9 |
| FRB 20240724F |
2024-07-24 11:26:45 |
19.7 |
| FRB 20240724G |
2024-07-24 11:31:16 |
12.0 |
| FRB 20240724H |
2024-07-24 11:25:58 |
15.6 |
| FRB 20240724I |
2024-07-24 11:36:07 |
10.5 |
| FRB 20240724J |
2024-07-24 11:25:58 |
10.3 |
| FRB 20240724K |
2024-07-24 11:29:51 |
11.5 |
| FRB 20240724L |
2024-07-24 11:28:51 |
8.5 |
| FRB 20240724M |
2024-07-24 12:41:06 |
9.4 |
The above approximate UTC burst times at 400 MHz (topocentric at CHIME near Penticton, Canada) are from the real-time detection system and subject to optimization following proper burst fitting.
Based on the intensity data of FRB 20240724M, we obtain a localization of RA (J2000): 354.58 +/- 0.07 deg (23h38m19.1s), Dec (J2000): 32.38 +/- 0.06 deg (32d22m48.00s) using the intensity localization method for sidelobe-detected events from Lin et al. (2023, arXiv:2307.05261).
Errors in this position are quoted at 90% a confidence level.
We encourage rapid follow-up, especially radio interferometric observations to further localize FRB 20240316A.
