We report on the detection of 8 high-fluence bursts within 7 days originating from FRB 20240114A. FRB 20240114A was initially discovered and reported on by the CHIME/FRB Collaboration (ATel #16420) and has subsequently been detected and localized by a variety of other telescopes (see e.g. ATels #16433, #16434, #16542, #16446, #16597, #16599, #16620 and references therein).

We have been observing FRB 20240114A regularly since its discovery. Our observations between June 2024 and December 2024 add up to 600 hours and led to the detection of 7 bursts at L-band 1.4 GHz (L-band, 500h) and no detections at 330 MHz (P-band, 100h). This indicates that the source continued to be active, but at a lower activity level during this time.

Most recently, we detected single bursts on December 30th and 31st, 2024, while detecting no bursts on January 2, 2025. On January 4, 2025 we detected 6 bursts in only 4.5 hours of observing, indicating high activity at that time. All reported bursts are detected at 1.4 GHz (L-band) and have a fluence higher than our completeness threshold of 10 Jy ms. The brightest event has a fluence of 770 +/- 150 Jy ms. We estimate the fluence by averaging over the full observing bandwidth and applying the radiometer equation using a system equivalent flux density (SEFD) of 250 Jy for Torun. The attached figure shows the dynamic spectra of three events.

In the HyperFlash project, we carry out high-cadence observations of known (repeating) FRB sources using a set of 25 to 32-meter European radio telescopes. Our observing strategy and participating stations have previously been described in ATel #16565 and Kirsten et al. 2024. Observations are carried out on a best-effort basis and, whenever possible, the telescopes observe simultaneously at complementary wavelengths.

Additionally, FRB 20240114A has also been detected by CHIME/FRB on January 1, 2025, as reported on the CHIME/FRB FRB repeater webpage. The detection of our high-fluence bursts within limited observing hours over the past week suggests that the source has entered a state of increased activity. We will continue to monitor FRB 20240114A using HyperFlash and encourage follow up observations at all wavelengths.

Ould-Boukattine et al. 2024, The Astronomer's Telegram, No. 16967.