A. W. Hotan
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View article: The Rapid ASKAP Continuum Survey (RACS) VI: The RACS-high 1655.5 MHz images and catalogue
The Rapid ASKAP Continuum Survey (RACS) VI: The RACS-high 1655.5 MHz images and catalogue Open
We have conducted a widefield, wideband, snapshot survey using the Australian SKA Pathfinder (ASKAP) referred to as the Rapid ASKAP Continuum Survey (RACS). RACS covers $\approx$ 90% of the sky, with multiple observing epochs in three freq…
View article: The first large absorption survey in H <scp>i</scp> (FLASH): II. Pilot survey data release and first results
The first large absorption survey in H <span>i</span> (FLASH): II. Pilot survey data release and first results Open
The First Large Absorption Survey in H i (FLASH) is a large-area radio survey for neutral hydrogen in and around galaxies in the intermediate redshift range $0.4\lt z\lt1.0$ , using the 21-cm H i absorption line as a probe of cold neutral …
View article: The Rapid ASKAP Continuum Survey (RACS) VI: The RACS-high 1 655.5 MHz images and catalogue
The Rapid ASKAP Continuum Survey (RACS) VI: The RACS-high 1 655.5 MHz images and catalogue Open
We have conducted a widefield, wideband, snapshot survey using the Australian SKA Pathfinder (ASKAP) referred to as the Rapid ASKAP Continuum Survey (RACS). RACS covers $\approx 90$ % of the sky, with multiple observing epochs in three fre…
View article: Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS
Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS Open
Late-time (∼a year) radio follow-up of optically discovered tidal disruption events (TDEs) is increasingly resulting in detections at radio wavelengths, and there is growing evidence for this late-time radio activity to be common to the br…
View article: The First Large Absorption Survey in HI (FLASH): II. Pilot Survey data release and first results
The First Large Absorption Survey in HI (FLASH): II. Pilot Survey data release and first results Open
The First Large Absorption Survey in HI (FLASH) is a large-area radio survey for neutral hydrogen in the redshift range 0.41$, and appear to be a mixture of intervening and associated systems. Interestingly, around two-thirds of the lines …
View article: Radio afterglows from tidal disruption events: An unbiased sample from ASKAP RACS
Radio afterglows from tidal disruption events: An unbiased sample from ASKAP RACS Open
Late-time ($\sim$ year) radio follow-up of optically-discovered tidal disruption events (TDEs) is increasingly resulting in detections at radio wavelengths, and there is growing evidence for this late-time radio activity to be common to th…
View article: The Future of Meetings: How can we adjust our practices to meet sustainably yet meaningfully?
The Future of Meetings: How can we adjust our practices to meet sustainably yet meaningfully? Open
There is no denying that we are living in a state of climate emergency, and yet across both astronomy and globally, the shift away from “business as usual” towards more sustainable practices seems too slow to realise meaningful…
View article: Virtual spaces for real connections
Virtual spaces for real connections Open
In the era of climate change concerns, global pandemics, decreasing funding availability and increasing restrictions on travel, the issue of online access to events has become an important topic of discussion. The importance of online acce…
View article: Discovery of five recycled pulsars in a high galactic latitude survey
Discovery of five recycled pulsars in a high galactic latitude survey Open
We present five recycled pulsars discovered during a 21 cm survey of approximately 4150 deg2 between 15° and 30° from the Galactic plane using the Parkes radio telescope. One new pulsar, PSR J1528-3146, has a 61 ms spin period and a massiv…
View article: Timing stability of millisecond pulsars and prospects for gravitational-wave detection
Timing stability of millisecond pulsars and prospects for gravitational-wave detection Open
The analysis of high-precision timing observations of an array of ~20 millisecond pulsars (a so-called 'timing array') may ultimately result in the detection of a stochastic gravitational-wave background. The feasibility of such a detectio…
View article: Survey and monitoring of ASKAP’s RFI environment and trends I: Flagging statistics
Survey and monitoring of ASKAP’s RFI environment and trends I: Flagging statistics Open
We present an initial analysis of Radio Frequency Interference (RFI) flagging statistics from archived Australian SKA Pathfinder (ASKAP) observations for the ‘Survey and Monitoring of ASKAP’s RFI environment and Trends’ (SMART) project. SM…
View article: Radio polarization measurements from RRAT J1819-1458
Radio polarization measurements from RRAT J1819-1458 Open
We present the first polarization measurements of the radio emission from RRAT J1819-1458. Our observations, conducted in parallel to regular timing sessions, have yielded a small number of bright and polarized pulses. The polarization cha…
View article: Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: Current limits and future prospects
Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: Current limits and future prospects Open
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View article: High-precision observations of relativistic binary and millisecond pulsars
High-precision observations of relativistic binary and millisecond pulsars Open
The technique of pulsar timing reveals a wealth of new information when a precision of ~1 μs or better is reached, but such precision is difficult to achieve. This thesis describes a series of very high precision timing observations that i…
View article: The Detection of an Extremely Bright Fast Radio Burst in a Phased Array Feed Survey
The Detection of an Extremely Bright Fast Radio Burst in a Phased Array Feed Survey Open
We report the detection of an ultra-bright fast radio burst (FRB) from a modest, 3.4-day pilot survey with the Australian Square Kilometre Array Pathfinder. The survey was conducted in a wide-field fly's-eye configuration using the phased-…
View article: Dispersion measure variations and their effect on precision pulsar timing
Dispersion measure variations and their effect on precision pulsar timing Open
We present an analysis of the variations seen in the dispersion measures (DMs) of 20-ms pulsars observed as part of the Parkes Pulsar Timing Array project. We carry out a statistically rigorous structure function analysis for each pulsar a…
View article: The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) first data release – CORRIGENDUM
The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) first data release – CORRIGENDUM Open
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View article: On detection of the stochastic gravitational-wave background using the Parkes pulsar timing array
On detection of the stochastic gravitational-wave background using the Parkes pulsar timing array Open
We search for the signature of an isotropic stochastic gravitational-wave background in pulsar timing observations using a frequency-domain correlation technique. These observations, which span roughly 12yr, were obtained with the 64-m Par…
View article: Survey and Monitoring of ASKAP's RFI Environment and Trends I: Flagging Statistics
Survey and Monitoring of ASKAP's RFI Environment and Trends I: Flagging Statistics Open
We present an initial analysis of Radio Frequency Interference (RFI) flagging statistics from archived Australian SKA Pathfinder (ASKAP) observations for the 'Survey and Monitoring of ASKAP's RFI environment and Trends' (SMART) project. Th…
View article: Characterizing Pulsars Detected in the Rapid ASKAP Continuum Survey
Characterizing Pulsars Detected in the Rapid ASKAP Continuum Survey Open
We present the detection of 661 known pulsars observed with the Australian SKA Pathfinder (ASKAP) telescope at 888 MHz as part of the Rapid ASKAP Continuum Survey (RACS). Detections were made through astrometric coincidence and we estimate…
View article: Characterizing Pulsars Detected in the Rapid ASKAP Continuum Survey
Characterizing Pulsars Detected in the Rapid ASKAP Continuum Survey Open
We present the detection of 661 known pulsars observed with the Australian SKA Pathfinder (ASKAP) telescope at 888 MHz as a part of the Rapid ASKAP Continuum Survey (RACS). Detections were made through astrometric coincidence and we estima…
View article: The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) First Data Release
The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) First Data Release Open
The Australian SKA Pathfinder (ASKAP) radio telescope has carried out a survey of the entire Southern Sky at 887.5MHz. The wide area, high angular resolution, and broad bandwidth provided by the low-band Rapid ASKAP Continuum Survey (RACS-…
View article: The Rapid ASKAP Continuum Survey IV: continuum imaging at 1367.5 MHz and the first data release of RACS-mid
The Rapid ASKAP Continuum Survey IV: continuum imaging at 1367.5 MHz and the first data release of RACS-mid Open
The Australian SKA Pathfinder (ASKAP) is being used to undertake a campaign to rapidly survey the sky in three frequency bands across its operational spectral range. The first pass of the Rapid ASKAP Continuum Survey (RACS) at 887.5 MHz in…
View article: TFOM: Generic Facilitation Template
TFOM: Generic Facilitation Template Open
This spreadsheet is based on one created initially to manage "The Future of Meetings" symposium in 2020. It was developed from scratch to help track the various tasks and deadlines associated with managing an online meeting, though it woul…
View article: TFOM: Generic Facilitation Template
TFOM: Generic Facilitation Template Open
This spreadsheet is based on one created initially to manage "The Future of Meetings" symposium in 2020. It was developed from scratch to help track the various tasks and deadlines associated with managing an online meeting, though it woul…
View article: The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) first data release
The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) first data release Open
The Australian SKA Pathfinder (ASKAP) radio telescope has carried out a survey of the entire Southern Sky at 887.5 MHz. The wide area, high angular resolution, and broad bandwidth provided by the low-band Rapid ASKAP Continuum Survey (RACS…
View article: The Rapid ASKAP Continuum Survey IV: continuum imaging at 1367.5 MHz and the first data release of RACS-mid
The Rapid ASKAP Continuum Survey IV: continuum imaging at 1367.5 MHz and the first data release of RACS-mid Open
The Australian SKA Pathfinder (ASKAP) is being used to undertake a campaign to rapidly survey the sky in three frequency bands across its operational spectral range. The first pass of the Rapid ASKAP Continuum Survey (RACS) at 887.5 MHz in…