ASKAP

ASKAP
, CSIRO · CC BY 3.0 · source
Name	ASKAP
Caption	Australian Square Kilometre Array Pathfinder radio telescope array at Murchison Radio-astronomy Observatory
Location	Murchison Radio-astronomy Observatory, Western Australia
Established	2012 (commissioning)
Owner	CSIRO
Operator	CSIRO Astronomy and Space Science
Telescope type	Radio interferometer
Diameter	36 antennas, 12 m each
Wavelength	centimetre
Notable	Phased Array Feeds, wide-field surveys

ASKAP The Australian Square Kilometre Array Pathfinder is a radio interferometer located at the Murchison Radio-astronomy Observatory in Western Australia. It serves as a technology demonstrator and survey instrument for the Square Kilometre Array initiative, enabling wide-field radio astronomy and time-domain studies. ASKAP has influenced developments across observatories, surveys, and international collaborations.

Overview

ASKAP was developed and deployed by CSIRO to test technologies relevant to the Square Kilometre Array and to conduct major surveys that complement facilities such as the Very Large Array, MeerKAT, Low Frequency Array, Arecibo Observatory, and Westerbork Synthesis Radio Telescope. The project intersects programs at institutions including the Australian National University, Curtin University, Swinburne University of Technology, University of Sydney, University of Western Australia, and international partners such as CSIRO Astronomy and Space Science collaborators and teams from ASTRON, National Radio Astronomy Observatory, Jodrell Bank Centre for Astrophysics, Max Planck Institute for Radio Astronomy, University of Cambridge, Harvard-Smithsonian Center for Astrophysics, and University of Oxford. ASKAP surveys complement missions like Gaia, Hubble Space Telescope, Chandra X-ray Observatory, XMM-Newton, Fermi Gamma-ray Space Telescope, James Webb Space Telescope, and Planck for multiwavelength science.

Design and Instrumentation

ASKAP comprises 36 12-metre antennas equipped with innovative phased-array feeds developed in collaboration with partners including CSIRO, Istituto Nazionale di Astrofisica, and University of Toronto. The phased-array feed technology builds on work from facilities such as Arecibo Observatory and Westerbork Synthesis Radio Telescope and informs design choices for the Square Kilometre Array and upgrades at MeerKAT. Antenna and correlator systems integrate hardware and software expertise from vendors and institutes such as Nortel, Lockheed Martin, Thales Alenia Space, Atacama Large Millimeter Array, and Swedish Institute of Space Physics teams. Instrumentation emphasizes wide field-of-view imaging, high survey speed, and real-time transient detection using computing resources influenced by architectures from CSIRO Data61, European Southern Observatory, CERN, Los Alamos National Laboratory, and IBM Research.

Scientific Goals and Discoveries

ASKAP pursues science in fields connected to projects and facilities including Pulsar timing arrays collaborations with Parkes Observatory and international work linked to NANOGrav, European Pulsar Timing Array, International Pulsar Timing Array. Key goals tie to studies with Gaia astrometry and surveys like Sloan Digital Sky Survey and Pan-STARRS, and to follow-up of transients discovered by Swift Observatory, Fermi Gamma-ray Space Telescope, Zwicky Transient Facility, and Large Synoptic Survey Telescope. ASKAP discoveries span fast radio bursts with connections to research by CHIME, Parkes Observatory, and Green Bank Telescope; neutral hydrogen mapping complementing ALFALFA and HIPASS; and polarimetric studies related to work at LOFAR, MWA, and Planck. Results feed cosmological and galaxy evolution programs linked to Dark Energy Survey, Euclid, 2dF Galaxy Redshift Survey, and Sloan Digital Sky Survey teams. ASKAP has contributed to transient catalogs used by groups at NASA, ESA, JAXA, and national observatories.

Operations and Data Processing

ASKAP operations are managed at the Murchison Radio-astronomy Observatory by CSIRO staff in coordination with international consortia such as the International Centre for Radio Astronomy Research and computing partners like Pawsey Supercomputing Centre, National Computational Infrastructure, Amazon Web Services, and research centers at University of Melbourne and Monash University. Data processing pipelines implement software paradigms from CASA, HEASoft, Astropy, Django, and distributed frameworks influenced by Hadoop and Apache Spark. Survey data products are integrated with archives similar to the NASA/IPAC Infrared Science Archive, ESO Science Archive, Vizier, ALMA Science Archive, and the Virtual Observatory standards developed by the International Virtual Observatory Alliance. Observing programs engage teams from Australian Square Kilometre Array Pathfinder Survey Science Projects, EMU, DINGO, VAST, FLASH, RACS, and international partners at University of Manchester, University of Toronto, Perth Observatory, and CSIRO Data61.

Collaborations and Projects

Major ASKAP survey projects include consortiums such as Evolutionary Map of the Universe (EMU), Deep Investigation of Neutral Gas Origins (DINGO), Variables and Slow Transients (VAST), First Large Absorption Survey in HI (FLASH), and the Rapid ASKAP Continuum Survey (RACS). These efforts coordinate with international projects including SKA Organisation, MeerKAT surveys like MIGHTEE, LADUMA, and programs at Jodrell Bank Observatory, NRAO, Dunlap Institute, CSIRO Astronomy and Space Science, and universities such as University of Adelaide, University of Tasmania, Flinders University, and La Trobe University. ASKAP partnerships extend to agencies and consortia: Australian Research Council, National Science Foundation, European Research Council, and philanthropic foundations supporting infrastructure and science fellowships.

Site and Infrastructure

The ASKAP array is sited at the Murchison Radio-astronomy Observatory within the Shire of Murchison, Western Australia, located in a radio-quiet zone protected under coordination with the Australian Communications and Media Authority and regional stakeholders including the Yamatji Nation. Infrastructure leverages the Murchison Widefield Array core facilities, the Pawsey Supercomputing Centre link, and logistical support from Perth Airport, Commonwealth Scientific and Industrial Research Organisation, and state agencies. The site is integral to national and international planning for the Square Kilometre Array and supports training and outreach with institutions such as CSIRO Education, International Centre for Radio Astronomy Research, Australian National University, and regional communities.

Category:Radio telescopes