期刊
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷 257, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4365/ac33ab
关键词
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资金
- Canada Foundation for Innovation (CFI) 2012 Leading Edge Fund [31170]
- province of British Columbia
- province of Quebec
- province of Ontario
- CFI 2015 Innovation Fund [33213]
- Dunlap Institute for Astronomy and Astrophysics at the University of Toronto
- Canadian Institute for Advanced Research (CIFAR)
- McGill University
- McGill Space Institute via the Trottier Family Foundation
- University of British Columbia
- David Dunlap family
- University of Toronto
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research Innovation
- National Science Foundation [2006548]
- Natural Sciences and Engineering Research Council (NSERC)
- NSERC [RGPIN-2015-05948, RGPIN-2020-04554, RGPIN-2019-067, CRD 523638-201, RGPIN 228738-13]
- Canada Research Chairs (CRC) program
- U.S. Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program
- John I. Watters Research Fellowship
- NWO Veni Fellowship
- CIFAR
- CRC Program
- Canadian Statistical Sciences Institute Collaborative Research Team Grant
- CFI John R. Evans Leaders Fund award
- NSF [1458952, AAG-1616042, 2008031, 1430284]
- Killam Fellowship
- FRQNT Centre de Recherche en Astrophysique du Quebec (CRAQ)
- FRQNT Doctoral Research award
- Ontario Research Fund-Research Excellence Program (ORF-RE)
- Simons Foundation
- Thoth Technology Inc.
- Alexander von Humboldt Foundation
- Gerhard Herzberg award
- Howard Webster Foundation Fellowship from CIFAR
- FRQNT CRAQ
- Lorne Trottier Chair in Astrophysics Cosmology
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [2006548] Funding Source: National Science Foundation
This study presents a catalog of 536 fast radio bursts detected by the CHIME/FRB Project over a one-year period, providing insights into the FRB population. The research shows consistency in sky locations and dispersion measures between repeaters and apparent nonrepeaters, while also highlighting differences in intrinsic temporal width and spectral bandwidth. Additionally, the study reveals the population properties of FRBs and conducts an absolute calibration of selection effects.
We present a catalog of 536 fast radio bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project between 400 and 800 MHz from 2018 July 25 to 2019 July 1, including 62 bursts from 18 previously reported repeating sources. The catalog represents the first large sample, including bursts from repeaters and nonrepeaters, observed in a single survey with uniform selection effects. This facilitates comparative and absolute studies of the FRB population. We show that repeaters and apparent nonrepeaters have sky locations and dispersion measures (DMs) that are consistent with being drawn from the same distribution. However, bursts from repeating sources differ from apparent nonrepeaters in intrinsic temporal width and spectral bandwidth. Through injection of simulated events into our detection pipeline, we perform an absolute calibration of selection effects to account for systematic biases. We find evidence for a population of FRBs-composing a large fraction of the overall population-with a scattering time at 600 MHz in excess of 10 ms, of which only a small fraction are observed by CHIME/FRB. We infer a power-law index for the cumulative fluence distribution of alpha=-1.40 +/- 0.11(stat.)(-0.09)(+0.06)(sys.), consistent with the -3/2 expectation for a nonevolving population in Euclidean space. We find that alpha is steeper for high-DM events and shallower for low-DM events, which is what would be expected when DM is correlated with distance. We infer a sky rate of [820 +/- 60(stat.)(-200)(+220)(sys.)]/sky/day above a fluence of 5 Jy ms at 600 MHz, with a scattering time at 600 MHz under 10 ms and DM above 100 pc cm(-3).
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