A5064539960- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Pulsars and Gravitational Waves Research
- Superconducting and THz Device Technology
- Gamma-ray bursts and supernovae
- Bluetooth and Wireless Communication Technologies
- Microwave Engineering and Waveguides
- Antenna Design and Optimization
- Scientific Research and Discoveries
- Astrophysics and Star Formation Studies
- Particle Accelerators and Free-Electron Lasers
- Astrophysical Phenomena and Observations
- ICT in Developing Communities
Farmingdale State College
2024
Astronomy and Space
2014-2021
Commonwealth Scientific and Industrial Research Organisation
2014-2021
Australia Telescope National Facility
2004-2019
Pinpointing a single fast radio burst Fast bursts (FRBs) are flashes of emission from distant astronomical sources. Two FRBs known to have repeated, but most last just few milliseconds and never seen again. Most telescopes that sensitive poor angular resolutions, so the FRB host galaxies remain unknown. Bannister et al. used dedicated observing mode on interferometer detect localize nonrepeating 180924, then followed up with optical telescope observations (see Perspective by Petroff). They...
In this paper we describe the system design and capabilities of Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope at conclusion its construction project commencement science operations. ASKAP is one first telescopes to deploy phased array feed (PAF) technology on a large scale, giving it an instantaneous field view that covers 31 square degrees 800 MHz. As two-dimensional 36x12m antennas, with baselines ranging from 22m 6km, also has excellent snapshot imaging capability...
At millimeter-wave frequencies, corrugated horns can be difficult and expensive to manufacture. As an alternative we present here the results of a theoretical measurement study smooth-walled spline-profile horn for specific application in 80-120 GHz band. While about 50% longer than its counterpart, is shown give improved performance across band as well being much easier
This paper describes the system architecture of a newly constructed radio telescope - Boolardy Engineering Test Array, which is prototype Australian Square Kilometre Array Pathfinder telescope. Phased array feed technology used to form multiple simultaneous beams per antenna, providing astronomers with unprecedented survey speed. The test described here 6-antenna interferometer, fitted signal processing hardware capable forming at least 9 dual-polarisation simultaneously, allowing several...
We report the discovery of a new 21-cm HI absorption system using commissioning data from Boolardy Engineering Test Array Australian Square Kilometre Pathfinder (ASKAP). Using 711.5 - 1015.5 MHz band ASKAP we were able to conduct blind search for line in continuous redshift range between $z = 0.4$ and 1.0, which has, until now, remained largely unexplored. The is detected at 0.44$ towards GHz-peaked spectrum radio source PKS B1740$-$517 demonstrates ASKAP's excellent capability performing...
Abstract We describe the performance of Boolardy Engineering Test Array, prototype for Australian Square Kilometre Array Pathfinder telescope. is first aperture synthesis radio telescope to use phased array feed technology, giving it ability electronically form up nine dual-polarisation beams. report methods developed forming and measuring beams, adaptations that have been made traditional calibration imaging procedures in order allow BETA function as a multi-beam commissioning instrument...
We present HI imaging of the galaxy group IC 1459 carried out with six antennas Australian SKA Pathfinder equipped phased-array feeds. detect and resolve in eleven galaxies down to a column density $\sim10^{20}$ cm$^{-2}$ inside ~6 deg$^2$ field resolution ~1 arcmin on sky ~8 km/s velocity. images, velocity fields integrated spectra all detections, highlight discovery three clouds -- two proximity 5270 one close NGC 7418. Each cloud has an mass $10^9$ M$_\odot$ accounts for ~15% associated...
Abstract The Variables and Slow Transients Survey (VAST) on the Australian Square Kilometre Array Pathfinder (ASKAP) is designed to detect highly variable transient radio sources timescales from 5 s $\sim\!5$ yr. In this paper, we present survey description, observation strategy initial results VAST Phase I Pilot Survey. This pilot consists of $\sim\!162$ h observations conducted at a central frequency 888 MHz between 2019 August 2020 August, with typical rms sensitivity $0.24\ \mathrm{mJy\...
Abstract The Rapid ASKAP Continuum Survey (RACS) is the first large-area survey to be conducted with full 36-antenna Australian Square Kilometre Array Pathfinder (ASKAP) telescope. RACS will provide a shallow model of sky that aid calibration future deep surveys. cover whole visible from site in Western Australia and band 700–1800 MHz. images are generally deeper than existing NRAO VLA Sky Sydney University Molonglo radio surveys have better spatial resolution. All products public, including...