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ASKAP FRB Overview and Galactic Plane Survey

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报告题目:ASKAP FRB Overview and Galactic Plane Survey

报 告 人:邱昊

报告时间:2018年12月27日 15时00分

报告地点: 212报告厅

 
ASKAP FRB Overview and Galactic Plane Survey

   Fast radio bursts (FRBs) are dispersed radio pulses at millisecond timescales, similar to pulsars yet much brighter and further away at extragalactic distances. Despite considerable efforts over the past decade, only 34 fast radio bursts have been reported, only one repeating FRB has been localised. This is largely due to the transient nature of FRBs and the poor localisation ability of single dish telescopes. Using the Australian Square Kilometre Array Pathfinder (ASKAP), a 36 dish interferometer designed for wide field surveys, we present the first results of the Commensal Real-time ASKAP Fast Transients (CRAFT) survey.  I will report the detection of 28 FRBs with ASKAP, it's implications and achieving realtime arcsecond localisation with FRBs.
    While ASKAP has proven to be an effective instrument for finding FRBs. This also makes it capable of finding Galactic fast transients. I will report the initial results from an ASKAP survey of the Galactic plane for dispersed single pulses. This survey aims on detecting rotating radio transients, fast radio bursts, and pulsar single pulses in the entire southern Galactic plane. The survey comprised 160 pointings covering 4800 deg2 of the Galactic plane within |b|< 7 deg. Each pointing with an exposure time of 10 hours, making it the longest galactic plane fast transient survey. While no RRATs were found, we detected one fast radio burst (FRB 180430), and single pulses from 12 pulsars. FRB 180430 was detected on the Galactic plane in the anti-centre direction with an extragalactic dispersion measure contribution no more than 99 pc cm^-3. We will conclude by making the case that FRB 180430 is a bona-fide FRB and not a galactic transient.

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