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Showing results for: [ Oslowski, Stefan ]
Fast radio bursts (FRBs) continue to raise more questions than they answer. Until last year, only one burst – the only one known to repeat - had been localized to a bright radio nebula (either a youn... moreg supernova remnant or pulsar wind nebulae) in a distant dwarf galaxy. Over the last three years searches with the Australian Square Kilometre Array Pathfinder (ASKAP) have detected 35 bursts, eight of which have been localised to host galaxies at redshifts ranging from 0.1 to 0.5. These bursts and their hosts are very unlike the repeater, suggesting there may be a dichotomy in the population. However one of the arcminute-localised ASKAP FRBs has recently been found to repeat. Here we propose to search and study repetitions in this FRB population. Our comprehensive sample and a dense monitoring campaign of well localised bursts, at a fluence limit more than 60 times lower than that of their detections to characterise the fraction of bursts that repeat. For bursts that repeat the unique wide bandwidth observations will be used to test leading models of burst emission.less
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 10 Jul 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 04 Jul 2020
The aim of this proposal is to carry out tests of the new backend instruments which cannot be carried out during standard maintenance periods. The scheduled time is used to measure beam shapes, deter... moremine polarisation calibration solutions and commission the National Facility observing modes for the new wide-band receiver.less
Australia Telescope National Facility - P737 - Commissioning the pulsar backends at Parkes - Published 02 Jul 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 01 Jul 2020
Australia Telescope National Facility - P737 - Commissioning the pulsar backends at Parkes - Published 30 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 16 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 15 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 13 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 12 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 09 Jun 2020
Australia Telescope National Facility - P737 - Commissioning the pulsar backends at Parkes - Published 08 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 04 Jun 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 02 Jun 2020
The Parkes Pulsar Timing Array (PPTA) project has three primary goals: (a) detection of gravitational waves from astronomical sources, (b) establishment of a pulsar timescale, and (c) improvement of o... moreur understanding of Solar-system dynamics. The PPTA is the oldest of three international pulsar timing groups. We have the smallest telescope and the smallest group, but the best measurements and the best results. Our bound on the strength of the incoherent gravitational wave background is the only bound which significantly constrains theoretical models. We have maintained our leading position because: we have the southern sky; we have a small but well-focussed group; we have the best-calibrated receivers; and we have been able to observe with an almost regular cadence of 15 to 20 days over a wide bandwidth. With this proposal we aim to maintain our pre-eminent position in the field. Unlike most observing proposals, this is a continuing proposal for which the observations will continue to improve bounds on ultra-low-frequency gravitational waves until they are finally detected. Continued Parkes observations will remain valuable at least until the first stage of the SKA is able to improve on our sensitivity and observing cadence. Even after the gravitational wave background is detected we will want to continue observations in support of the nascent field of gravitational wave astronomy!less
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 31 May 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 23 May 2020
Australia Telescope National Facility - P737 - Commissioning the pulsar backends at Parkes - Published 19 May 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 18 May 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 16 May 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 08 May 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 30 Apr 2020
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 26 Apr 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 24 Apr 2020
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 23 Apr 2020
