Nondetection of CHIME/Fast Radio Burst Sources with the Arecibo Observatory

• Published in: The Astrophysical journal Vol. 944; no. 1; pp. 70 - 79
• Main Authors: Good, Deborah C., Chawla, Pragya, Fonseca, Emmanuel, Kaspi, Victoria, Meyers, B. W., Pleunis, Ziggy, Sand, Ketan R., Scholz, Paul, Stairs, I. H., Tendulkar, Shriharsh P.
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.02.2023; IOP Publishing
• Subjects: Astrophysics; Compact objects; Poisson distribution; Radio bursts; Radio transient sources; Repetition; Statistical analysis; Weibull distribution
• ISSN: 0004-637X; 1538-4357
• DOI: 10.3847/1538-4357/acb139

Abstract In this work, we present follow-up observations of two known repeating fast radio bursts (FRBs) and seven nonrepeating FRBs with complex morphology discovered with the CHIME/FRB project. These observations were conducted with the Arecibo Observatory 327 MHz receiver. We detected no additional bursts from these sources, nor did CHIME/FRB detect any additional bursts from these sources during our follow-up program. Based on these nondetections, we provide constraints on the repetition rate for all nine sources. We calculate repetition rates above 1 Jy using both a Poisson distribution of repetition and the Weibull distribution of repetition presented by Oppermann et al. For both distributions we find repetition upper limits of the order λ = 10 −2 –10 −1 hr −1 for all sources. These rates are much lower than those published for notable repeating FRBs like FRB 20121102A and FRB 20201124A, suggesting the possibility of a low-repetition subpopulation.