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 two year searches with the Australian Square Kilometre Array Pathfinder (ASKAP) have detected 31 bursts, five 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 14 Nov 2019
We propose to conduct observations of PSR J1653-45, a 951-ms pulsar in a long, 1.5-yr orbit. Binary pulsars are valuable objects of scientific study, allowing for a wide range of applications, includi... moreng tests of gravity, probes of the neutron star equation of state, and fossil records of stellar evolution. Long spin-period pulsars in binary systems are generally much rarer than faster-spinning `recycled’ pulsars, and represent an under-explored region of pulsar binary evolution.
In addition to its long orbital period, PSR J1653-45 also experiences extended eclipses, lasting up to half of the orbital period and whose nature is not well understood. These eclipses have also prevented the determination of an orbital of phase-connected timing solution, both vital steps in allowing for the continued study of this system. We propose a targeted, high-cadence observing campaign designed to monitor this pulsar as it transition into its eclipsing state. The campaign has the twin goals of both monitoring how the eclipse affects the pulsar’s emission properties, thereby revealed more about the nature of the eclipses themselves, and of extracting as much information regarding the pulsar’s orbit during its least-explored regions, thereby constrained and hopefully solving the pulsar’s orbit and ideally leading to the development of a timing solution. In both instances, we hope to gain a greater understanding of this pulsar’s properties and how it fits into this under-explored class of unrecycled pulsar binaries.less
Australia Telescope National Facility - P1021 - Mapping the orbit of an enigmatic 1.5-yr eclipsing binary pulsar. - Published 14 Nov 2019
This repository houses the raw data files for a 1.7 km long seismic reflection profile that was collected in 2018. The data are in seg2 format (Geometrics software) and some geometry files might need ... moreto be fixed. The data are organized in the order they were collected. Each roll has 48 channels. There is a text file in each directory that has the shot location and file name. Check the notes, but for the most part we collect 10 shots at each location. These files will need to be stacked together prior to using.less
Goyder Finding Long-term Outback Water Solutions: Stage-3 (G-Flows Stage-3) - - Published 14 Nov 2019
This repository houses the raw data files for a 235 m long seismic reflection profile that was collected in 2018 in the North Adelaide Plains. The data are in seg2 format (Geometrics software) and som... moree geometry files might need to be fixed. The data are organized in the order they were collected. Each roll has 48 channels. There is a text file in with the .dat files that contains the shot location and file name. Check the notes, but for the most part we collect 10 shots at each location. These files will need to be stacked together prior to using. less
FSP-DEI_Theme 2 (PDF Flinchum CLW-DEI Labour & Opex) - - Published 14 Nov 2019
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 13 Nov 2019
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 13 Nov 2019
This project is to continue timing and profile studies of the first double-pulsar system, a unique laboratory for gravitational physics. Recent results, including the first measurements of higher-orde... morer light-propagation effects and of the relativistic deformation of the orbit, highlight the importance of a long term observational campaign for this remarkable system. The main aims of this proposal are to provide the strongest tests to date for general relativity and to measure for the first time the moment-of-inertia of a neutron star. Additionally, we will determine the system geometry and map the pulsar beams via geodetic precession. Whenever possible, we will exploit the high sensitivity of the new UWL receiver.less
Australia Telescope National Facility - P455 - Timing & geodetic precession in the double pulsar and two
relativistic binaries - Published 13 Nov 2019
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 12 Nov 2019
This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries. As the observing time has been purchased this proposal (an... mored the related PX501) does not require TAC grading. The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first, relating to this proposal, will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period. The second type of time will be scheduled in shorter blocks and the data archived with a 10 year embargo.less
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 12 Nov 2019
Vegetation Fractional Cover represents the exposed proportion of Photosynthetic Vegetation (PV), Non-Photosynthetic Vegetation (NPV) and Bare Soil (BS) within each pixel. The sum of the three fraction... mores is 100% (+/- 3%) and shown in Red/Green/Blue colors. In forested canopies the photosynthetic or non-photosynthetic portions of trees may obscure those of the grass layer and/or bare soil. This product is derived from the MODIS Nadir BRDF-Adjusted Reflectance product (MCD43A4) collection 6 and has 500 meters spatial resolution.
A suite of derivative products are also produced including monthly fractional cover, total vegetation cover (PV+NPV), and anomaly of total cover against the time series.
Monthly: The monthly product is aggregated from the 8-day composites using the medoid method.
Anomaly: represents the difference between total vegetation cover (PV+NPV) in a given month and the mean total vegetation cover for that month in all years available, expressed in units of cover. For example, if the mean vegetation cover in January (2001-current year) was 40% and the vegetation cover for the pixel in January 2018 was 30%, the anomaly for the pixel in Jan 2018 would be -10%.
Decile: represents the ranking (in ten value intervals) for the total vegetation cover in a given month in relation to the vegetation cover in that month for all years in the time-series.
MODIS fractional cover has been validated for Australia. less
DoAWR - Improving the RaPP Map monitoring tool for Australia - - Published 11 Nov 2019
DNA sequence data alignments, partitioning information and resulting phylogenetic trees for study of evolutionary relationships of the groundsel tribe (Senecioneae) of the daisy family (Asteraceae).
Strategic CANBR Research - - Published 11 Nov 2019
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 11 Nov 2019
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 10 Nov 2019
We propose timing observations of southern double neutron star (DNS) systems to obtain precise estimates
of the component masses and thus increase the statistics of neutron star mass distribution. Th... moree improved
sensitivity of the Ultra Wideband Low (UWL) receiver will provide a 3X increase in the precision of the time
of arrivals (ToAs) of the pulses compared to the multibeam data. This has the potential to perform quick
measurements of masses for a number of binary systems in the next 1-2 years. We will also use MeerKAT
observations at crucial orbital phases to increase our chances of mass measurements. Increase in the number
of measured NS masses has significant implications for understanding NS internal structure and for stellar
and binary evolution physics.less
Australia Telescope National Facility - P1032 - Mass measurements of southern binary pulsar systems - Published 10 Nov 2019
We recently discovered two millisecond pulsars (MSPs) in the globular cluster, Omega Centauri, the first pulsar discovery in this globular cluster. The discovery of these MSPs will enable us to study ... morethe stellar population and dynamics in the core of Omega Centauri, and to probe the ionised interstellar medium in Omega Centauri. These two MSPs are potentially in extreme eclipsing systems, and are useful for us to understand the formation of such systems. More importantly, our discoveries, for the first time, allow us to carry out a deep, coherently de-dispersed, high time resolution survey of pulsars in Omega Centauri, which might lead to exciting discoveries. We propose to carry out follow-up timing observations of the new discoveries, and a new coherently de-dispersed, high time resolution survey of Omega Centauri.less
Australia Telescope National Facility - P1034 - Follow-up of the first millisecond pulsar discoveries in Omega Centauri and a new coherently de-dispersed survey - Published 09 Nov 2019
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 09 Nov 2019
We propose to observe the magnetars 1E 1547.0-5408 and PSR J1622-4950
approximately weekly, to track their rotation, flux density, and
polarisation, as we have been doing through this project. Also,... more as
of late 2018, XTE J1810-197 is again a radio magnetar after 10 years
dormant! Its chaotic rotation is better tracked in detail elsewhere,
but weekly observations with the UWL receiver are already providing
unique measurements of its radio spectrum and broad-band behaviour.
Our observations provide an important window into remarkably dynamic
magnetar magnetospheres, and characterise the conditions under which
radio emission takes place therein, placing constraints on the
emission mechanisms, which in at least some significant respects
differ from those of ordinary pulsars.less
Australia Telescope National Facility - P885 - Understanding the Remarkable Behaviour of Radio Magnetars - Published 08 Nov 2019
Visible-near infrared to shortwave infrared (VNIR-SWIR) and midwave infrared to thermal infrared (MIR-TIR) fourier transform infrared spectroscopy (FTIR) measurements of the National Geochemical Surve... morey of Australia soil samples from Geoscience Australia (GA). Samples were measured at the Australian Resources Research Center in Kensington, WA by CSIRO and GA staff between 2013-2016. A total of 1308 samples were measured using the two spectral methods.less
TCP06 EOI Optical Cal Val - Soil spectral measurements - Published 08 Nov 2019
We propose to carry out Parkes follow-up observations of the new millisecond pulsar, J1431-6328, discovered by the Australian SKA Pathfinder (ASKAP) and Parkes Ultra-Wideband Low (UWL) receiver. The d... moreiscovery demonstrated the power of identifying pulsar candidates in radio continuum images and then following up with high time resolution observations. The discovery itself is also interesting. PSR J1431-6328 has a spin period of 2.77 ms, and is likely to be in a binary system. Follow-up observations will enable us to measure the binary parameters, which will guide future multi-wavelength observations and might shed new lights on the binary evolution. The short spin period, relatively large flux density and sky location of PSR J1431-6328 also make it a promising candidate for pulsar timing arrays. The proposed observations will allow us to obtain a timing solution of this new pulsar, and are therefore essential for future timing observations.less
Australia Telescope National Facility - P1027 - Follow-up of the ASKAP discovery of millisecond pulsar J1431-6328 - Published 08 Nov 2019
We request time to observe 260 pulsars on a regular basis to provide the accurate ephemerides necessary for the detection and characterisation of gamma-ray pulsars with the Fermi satellite. The primar... morey science goals are to increase the number of known gamma-ray pulsars (both radio loud and radio quiet), to determine accurate pulse profiles, and to characterise their high energy (phase-resolved) spectra. In the radio, the observations will also allow us to investigate: neutron stars and pulsar emission via detecting glitches and determining pulse timing parameters; and the ISM via measuring and monitoring dispersion measures, Faraday rotation measures, and scintillation. To date, we are (co-)authors on 75 papers arising from the collaboration and P574 data. The data have contributed to the PhD theses of students from Bordeaux, Manchester, Oxford, Stanford, and Swinburne.less
Australia Telescope National Facility - P574 - Pulsar timing and the GLAST mission - Published 08 Nov 2019
This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries. As the observing time has been purchased this proposal (an... mored the related PX500) does not require TAC grading. The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first (PX500) will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period. The second type of time (relating to this proposal) will be scheduled in shorter blocks and the data archived with a 10 year embargo.less
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 08 Nov 2019
These are behavioural data from tests conducted on individual hens that differed in their range use. The tests applied were an Open Field Test, Tonic Immobility Test, and an Attention Bias test.
UNE: A17/2342 Effects of rearing environments on ranging, adaptation to stressors and health in free-range laying hens - - Published 07 Nov 2019
Pre-mortem welfare scores, post-mortem health assessment and body composition from CT scanning from free-range hens that differed in range usage patterns as well as different rearing enrichment treatm... moreents. less
Australia Telescope National Facility - P958 - Searching for repetition from ASKAP fast radio bursts - Published 07 Nov 2019