| 23nd of May 2017 |
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| The detection of an extremely bright fast radio burst in a phased array feed survey |
| by Keith Bannister (CASS) |
| ASKAP's first FRB!
FRB170107 was discovered
after just 3.5 days of
observing with 8 of ASKAP's 36 antennas. We used a fly's-eye mode where
each antenna pointed at a different part of the sky. This yielded an
instantaneous field of view of 240 square degrees, equivalent to about
1000 full moons! The figure shows the FRB on the top-left, and the
dynamic spectrum on the bottom left. The right panel shows the 36 beams
of ASKAP antenna number 5 (named Gagurla in the local Wadjarri
language) at the time the FRB occurred, overlaid on an NVSS map. The red
smudge is the uncertainty region of the FRB position. Thanks to the
ASKAP's phased-array-feed, the FRB was detected in multiple beams. Using
this fact we could constrain it's position to a 10 arcminute region,
much better than is usually possible with even larger telescopes. The
full moon is shown to scale. Reference: Bannister et al. 2017, ApJ Letters 841, xxx. - More infomation ASKAP telescope to rule radio-burst hunt (phys.org), ASKAP telescope speeds up the hunt for new Fast Radio Bursts (The Conversation), CSIRO's ASKAP telescope detects fast radio burst in just four days of operation (SMH) |