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19 April 2024 |
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A Survey of the Galactic Plane for Dispersed Pulses with the Australian Square Kilometre Array Pathfinder | | Hao Qiu
; K.W. Bannister
; R.M. Shannon
; Tara Murphy
; Shivani Bhandari
; Devansh Agarwal
; D.R. Lorimer
; J.D. Bunton
; | | Date: |
12 Mar 2019 | | Abstract: | We report the results from a survey of the Galactic plane for dispersed
single pulses using the Australian SKA Pathfinder (ASKAP). We searched for rare
bright dispersed radio pulses comprising 160 pointings covering 4800 deg$^2$ of
the Galactic plane within |b| $< 7 deg$, each pointing with an exposure time
of 10 hours. We detected one fast radio burst, FRB 180430, and single pulses
from 11 pulsars. No rotating radio transients were detected. We detected FRB
180430 in the Galactic plane in the anticentre direction with a fluence of
216$pm5$Jy ms a dispersion measure (DM) of 264.1 pc cm-3. We estimate the
extragalactic DM of the object to be less than 86.7 $ ext{pc}
ext{cm}^{-3} $ depending on the electron density model. One model suggests
that this FRB may be a giant pulse within our galaxy; we discuss how this may
not correctly represent the line-of-sight DM. Based on the single detection of
FRB 180430 in 3.47 $ imes 10^{4}$ deg$^2$ h we derive a FRB event rate in the
Galactic plane at the 20 Jy ms threshold to be in the range 2-140 per sky per
day at 95% confidence. Despite the necessarily large uncertainties from this
single detection, this is consistent with the current ASKAP all-sky detection
rate. | | Source: | arXiv, 1903.4694 | | Services: | Forum | Review | PDF | Favorites | |
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