Chromatic periodic activity down to 120 MHz in a Fast Radio Burst

Fast radio bursts (FRBs) are extragalactic astrophysical transients whose brightness requires emitters that are highly energetic, yet compact enough to produce the short, millisecond-duration bursts. FRBs have thus far been detected between 300 MHz and 8 GHz, but lower-frequency emission has remained elusive. A subset of FRBs is known to repeat, and one of those sources, FRB 20180916B, does so with a 16.3 day activity period. Using simultaneous Apertif and LOFAR data, we show that FRB 20180916B emits down to 120 MHz, and that its activity window is both narrower and earlier at higher frequencies. Binary wind interaction models predict a narrower periodic activity window at lower frequencies, which is the opposite of our observations. Our detections establish that low-frequency FRB emission can escape the local medium. For bursts of the same fluence, FRB 20180916B is more active below 200 MHz than at 1.4 GHz. Combining our results with previous upper-limits on the all-sky FRB rate at 150 MHz, we find that there are 3-450 FRBs/sky/day above 50 Jy ms at 90% confidence. We are able to rule out the scenario in which companion winds cause FRB periodicity. We also demonstrate that some FRBs live in clean environments that do not absorb or scatter low-frequency radiation.Comment: 50 pages, 14 figures, 3 tables, submitte

Clinical and genetic characteristics of late-onset Huntington's disease

The frequency of late-onset Huntington's disease (>59 years) is assumed to be low and the clinical course milder. However, previous literature on late-onset disease is scarce and inconclusive

Transparency and accountability of central banks in their role of financial stability supervisor in OECD countries

Financial stability, Accountability,

Home Country versus Cross-Border Negative Externalities in Large Banking Organization Failures and How to Avoid Them

This paper examines the negative externalities that may occur when a large bank fails, describes the nature of those externalities, and explores whether they may be greater in a case involving a large cross-border banking organization. The analysis suggests that the chief negative externalities are associated with credit losses and losses due to liquidity problems, and these losses are critically affected by how promptly an insolvent institution is closed, how quickly depositors gain access to their funds, and how long it takes borrowers to reestablish credit relationships. While regulatory delay and forbearance may affect the size and distribution of losses, the likely incident of systemic risk and the negative externalities are more associated with the structure of the applicable bankruptcy laws and methods available to resolve a failed institution and quickly get it operating again. This circumstance implies that regulatory concerns about systemic risk should be directed first at closing institutions promptly, reforming bankruptcy statutes to admit special procedures for handling bank failures, and providing mechanisms to give creditors and borrowers prompt and immediate access to their funds and lines of credit

Reproduction package for the paper "The Apertif Radio Transient System (ARTS): Design, Commissioning, Data Release, and Detection of the first 5 Fast Radio Bursts"

This is a basic reproduction package for the paper "The Apertif Radio Transient System (ARTS): Design, Commissioning, Data Release, and Detection of the first 5 Fast Radio Bursts" by van Leeuwen et al. (2023). * arXiv:arXiv:2205.12362 * DOI: 10.1051/0004-6361/20224410