ASKAP detection of FRB 190714

Authors:  S. Bhandari (CSIRO Astronomy and Space Science), P. Kumar (Swinburne University of Technology, SUT), R. M. Shannon (SUT), J.-P. Macquart (ICRAR/Curtin University) on behalf of the ASKAP-CRAFT collaboration. 

We report the detection of a Fast Radio Burst (FRB) with the Australian Square Kilometre Array Pathfinder (ASKAP), as part of the Commensal Real Time Fast Transient (CRAFT) survey science project. The burst, FRB 190714, was detected with a reported signal to noise ratio of 11 in the incoherent sum of 28 antennas.  The system was operating with a central frequency of 1272.5 MHz and an observing bandwidth of 336 MHz, and time resolution of 1.76 ms.  

A preliminary localization using the multi beam approach described in Bannister et al. (2017, ApJL, 841,12). The properties of the burst are as follows: 

  • Date: 2019-07-14.234177092 (fractional day)  
  • UTC:  2019-07-14-05:37:12.90076 (fractional seconds)
  • RA (J2000): 12:15.9(5)
  • DEC (J2000): -13:00(6)
  • DM: 504(2) pc cm-3    
  • Fluence: 8(2) Jy ms 

Quoted uncertainties are with 90% confidence.

The burst was detected at a Galactic latitude of 49.0 deg and a Galactic longitude of 289.7 deg.   Galactic dispersion measures in this direction are modelled to be 39 pc cm-3 (Cordes & Lazio, arXiv:0207156) and 31 pc cm-3 (Yao et al., 2017, ApJ, 835,29). 

A plot of the dynamic spectrum of the burst is shown below: