Limits on Precursor and Afterglow Radio Emission from a Fast Radio Burst in a Star-forming Galaxy
Shivani Bhandari,Keith W. Bannister,Emil Lenc,Hyerin Cho,Ron Ekers,Ron Ekers,Cherie K. Day,Cherie K. Day,Adam Deller,Chris Flynn,C. W. James,Jean-Pierre Macquart,Elizabeth K. Mahony,Lachlan Marnoch,Lachlan Marnoch,Vanessa A. Moss,Vanessa A. Moss,Chris Phillips,J. Xavier Prochaska,J. Xavier Prochaska,Hao Qiu,Hao Qiu,Stuart D. Ryder,Ryan Shannon,Nicolas Tejos,O. Ivy Wong +25 more
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In this paper, a fast radio burst (FRB) at 920 MHz was discovered during commensal observations conducted with the Australian Square Kilometre Array Pathfinder (ASKAP) as part of the Commensal Real-time ASKAP Fast Transients (CRAFT) survey.Abstract:
We present a new fast radio burst (FRB) at 920 MHz discovered during commensal observations conducted with the Australian Square Kilometre Array Pathfinder (ASKAP) as part of the Commensal Real-time ASKAP Fast Transients (CRAFT) survey. FRB 191001 was detected at a dispersion measure (DM) of 506.92(4) pc cm$^{-3}$ and its measured fluence of 143(15) Jy ms is the highest of the bursts localized to host galaxies by ASKAP to date. The subarcsecond localization of the FRB provided by ASKAP reveals that the burst originated in the outskirts of a highly star-forming spiral in a galaxy pair at redshift $z=0.2340(1)$. Radio observations show no evidence for a compact persistent radio source associated with the FRB 191001 above a flux density of $15 \mu$Jy. However, we detect diffuse synchrotron radio emission from the disk of the host galaxy that we ascribe to ongoing star formation. FRB 191001 was also detected as an image-plane transient in a single 10 s snapshot with a flux density of 19.3 mJy in the low-time-resolution visibilities obtained simultaneously with CRAFT data. The commensal observation facilitated a search for repeating and slowly varying radio emissions 8 hr before and 1 hr after the burst. We found no variable radio emission on timescales ranging from 1 ms to 1.4 hr. We report our upper limits and briefly review FRB progenitor theories in the literature that predict radio afterglows. Our data are still only weakly constraining of any afterglows at the redshift of the FRB. Future commensal observations of more nearby and bright FRBs will potentially provide stronger constraints.read more
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On the Fast Radio Burst and Persistent Radio Source Populations
TL;DR: In this article , the first Fast Radio Burst (FRB) to be precisely localized was associated with a luminous persistent radio source (PRS), and a second FRB/PRS association was discovered for another repeating source of FRBs.
Journal ArticleDOI
The 60 pc Environment of FRB 20180916B
Shriharsh P. Tendulkar,Shriharsh P. Tendulkar,Armando Gil de Paz,Aida Yu. Kirichenko,Aida Yu. Kirichenko,Jason W. T. Hessels,Jason W. T. Hessels,Mohit Bhardwaj,Fernando Antonio de Ávila,Cees Bassa,P. Chawla,Emmanuel Fonseca,Victoria M. Kaspi,A. Keimpema,F. Kirsten,T. Joseph W. Lazio,Benito Marcote,Kiyoshi Masui,K. Nimmo,K. Nimmo,Zsolt Paragi,Mubdi Rahman,Daniel Reverte Payá,P. Scholz,Ingrid H. Stairs +24 more
TL;DR: The16.35-day period in its bursting was observed in this article, where optical and infrared imaging as well as integral field spectroscopy observations of FRB 20180916B with the WFC3 camera on the Hubble Space Telescope and the MEGARA spectrograph on the 10.4m Gran Telescopio Canarias.
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TL;DR: In this paper, the authors presented a growing, but still mysterious, population of fast radio burst (FRB) sources, including 60 unique sources, 2 repeating FRBs, and only 1 identified host galaxy.
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Redshift Estimation and Constraints on Intergalactic and Interstellar Media from Dispersion and Scattering of Fast Radio Bursts
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References
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