期刊
ASTROPHYSICAL JOURNAL
卷 899, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/aba4ac
关键词
Radio transient sources; Radio interferometry; Extragalactic astronomy; Radio bursts
资金
- NSF [1714897, 2022546, AST-1911140, AST-1910471]
- Frank and Peggy Taplin Membership Fund
- FONDECYT [11191217]
- National Science Foundation (NSF) Physics Frontier Center [1430284]
- FRQNT Doctoral Research Award
- National Aeronautics and Space Administration
- National Aeronautics and Space Administration [NNX08AR22G]
- National Science Foundation [AST-1238877]
- NASA [NAS5-26555]
- NASA Office of Space Science [NNX13AC07G]
- W. M. Keck Foundation
- [GN-2019A-Q-107]
- [GN-2020A-FT-201]
- Direct For Mathematical & Physical Scien [1714897] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [2022546] Funding Source: National Science Foundation
- Division Of Astronomical Sciences [1714897] Funding Source: National Science Foundation
We present the discovery and subarcsecond localization of a new fast radio burst (FRB) by the Karl G. Jansky Very Large Array (VLA) and realfast search system. The FRB was discovered on 2019 June 14 with a dispersion measure of 959 pc cm(-3). This is the highest DM of any localized FRB and its measured burst fluence of 0.6 Jy ms is less than nearly all other FRBs. The source is not detected to repeat in 15 hr of VLA observing and 153 hr of CHIME/FRB observing. We describe a suite of statistical and data quality tests we used to verify the significance of the event and its localization precision. Follow-up optical/infrared photometry with Keck and Gemini associate the FRB with a pair of galaxies with r similar to 23 mag. The false-alarm rate for radio transients of this significance that are associated with a host galaxy is roughly 3 x 10(-4) hr(-1). The two putative host galaxies have similar photometric redshifts of z(phot) similar to 0.6, but different colors and stellar masses. Comparing the host distance to that implied by the dispersion measure suggests a modest (similar to 50 pc cm(-3)) electron column density associated with the FRB environment or host galaxy/galaxies.
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