ARC CENTRE OF EXCELLENCE FOR ALL-SKY ASTROPHYSICS - MATCHING CONTRIBUTION

A SEARCH FOR FAST RADIO BURSTS AT LOW FREQUENCIES WITH MURCHISON WIDEFIELD ARRAY HIGH TIME RESOLUTION IMAGING

SJ Tingay, CM Trott, RB Wayth, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, AA Deshpande, L Feng, BM Gaensler, LJ Greenhill, PJ Hancock, BJ Hazelton, M Johnston-Hollitt, DL Kaplan, CJ Lonsdale, SR McWhirter, DA Mitchell, MF Morales, E Morgan

2015-12-01

We present the results of a pilot study search for fast radio bursts (FRBs) using the Murchison Widefield Array (MWA) at low frequ..

Origin of cosmic chemical abundances

Umberto Maio, Edoardo Tescari

2015-11-11

Cosmological N-body hydrodynamic computations following atomic and molecular chemistry (e-, H, H+, H-, He,He+, He++, D, D+, H2, H2..

Direct Shear Mapping: Prospects for Weak Lensing Studies of Individual Galaxy-Galaxy Lensing Systems

CO de Burgh-Day, EN Taylor, RL Webster, AM Hopkins

2015-11-04

Using both a theoretical and an empirical approach, we have investigated the frequency of low redshift galaxy-galaxy lensing syste..

Quantifying ionospheric effects on time-domain astrophysics with the Murchison Widefield Array

Shyeh Tjing Loi, Tara Murphy, Martin E Bell, David L Kaplan, Emil Lenc, Andre R Offringa, Natasha Hurley-Walker, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, BE Corey, AA Deshpande, D Emrich, BM Gaensler, R Goeke, LJ Greenhill, BJ Hazelton, M Johnston-Hollitt, JC Kasper

2015-11-01

Refraction and diffraction of incoming radio waves by the ionosphere induce time variability in the angular positions, peak amplit..

Discovery of H I gas in a young radio galaxy at z=0.44 using the Australian Square Kilometre Array Pathfinder

JR Allison, EM Sadler, VA Moss, MT Whiting, RW Hunstead, MB Pracy, SJ Curran, SM Croom, M Glowacki, R Morganti, SS Shabala, MA Zwaan, G Allen, SW Amy, P Axtens, L Ball, KW Bannister, S Barker, ME Bell, DC-J Bock

2015-10-21

We report the discovery of a new 21-cm HI absorption system using commissioning data from the Boolardy Engineering Test Array of t..

ASKAP HI imaging of the galaxy group IC 1459

P Serra, B Koribalski, V Kilborn, JR Allison, SW Amy, L Ball, K Bannister, ME Bell, DC-J Bock, R Bolton, M Bowen, B Boyle, S Broadhurst, D Brodrick, M Brothers, JD Bunton, J Chapman, W Cheng, AP Chippendale, Y Chung

2015-09-21

We present HI imaging of the galaxy group IC 1459 carried out with six antennas of the Australian Square Kilometre Array Pathfinde..

BROADBAND SPECTRAL MODELING OF THE EXTREME GIGAHERTZ-PEAKED SPECTRUM RADIO SOURCE PKS B0008-421

JR Callingham, BM Gaensler, RD Ekers, SJ Tingay, RB Wayth, J Morgan, G Bernardi, ME Bell, R Bhat, JD Bowman, F Briggs, RJ Cappallo, AA Deshpande, A Ewall-Wice, L Feng, LJ Greenhill, BJ Hazelton, L Hindson, N Hurley-Walker, DC Jacobs

2015-08-20

We present broadband observations and spectral modeling of PKS B0008-421 and identify it as an extreme gigahertz-peaked spectrum (..

Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations

BS Arora, J Morgan, SM Ord, SJ Tingay, N Hurley-Walker, M Bell, G Bernardi, NDR Bhat, F Briggs, JR Callingham, AA Deshpande, KS Dwarakanath, A Ewall-Wice, L Feng, B-Q For, P Hancock, BJ Hazelton, L Hindson, D Jacobs, M Johnston-Hollitt

2015-08-10

We compare first-order (refractive) ionospheric effects seen by the MWA with the ionosphere as inferred from GPS data. The first-o..

MURCHISON WIDEFIELD ARRAY OBSERVATIONS OF ANOMALOUS VARIABILITY: A SERENDIPITOUS NIGHT-TIME DETECTION OF INTERPLANETARY SCINTILLATION

DL Kaplan, SJ Tingay, PK Manoharan, JP Macquart, P Hancock, J Morgan, DA Mitchell, RD Ekers, RB Wayth, C Trott, T Murphy, D Oberoi, IH Cairns, L Feng, N Kudryavtseva, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, AA Deshpande

2015-08-10

We present observations of high-amplitude rapid (2 s) variability toward two bright, compact extragalactic radio sources out of se..

SIMULTANEOUS OBSERVATIONS OF GIANT PULSES FROM THE CRAB PULSAR, WITH THE MURCHISON WIDEFIELD ARRAY AND PARKES RADIO TELESCOPE: IMPLICATIONS FOR THE GIANT PULSE EMISSION MECHANISM

SI Oronsaye, SM Ord, NDR Bhat, SE Tremblay, SJ McSweeney, SJ Tingay, W van Straten, A Jameson, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, AA Deshpande, LJ Greenhill, BJ Hazelton, M Johnston-Hollitt, DL Kaplan, CJ Lonsdale, SR McWhirter, DA Mitchell

2015-08-10

We report on observations of giant pulses from the Crab pulsar performed simultaneously with the Parkes radio telescope and the in..

Direct shear mapping - a new weak lensing tool

CO de Burgh-Day, EN Taylor, RL Webster, AM Hopkins

2015-08-01

We have developed a new technique called direct shear mapping (DSM) to measure gravitational lensing shear directly from observati..

CONFIRMATION OF WIDE-FIELD SIGNATURES IN REDSHIFTED 21 cm POWER SPECTRA

Nithyanandan Thyagarajan, Daniel C Jacobs, Judd D Bowman, N Barry, AP Beardsley, G Bernardi, F Briggs, RJ Cappallo, P Carroll, AA Deshpande, A de Oliveira-Costa, Joshua S Dillon, A Ewall-Wice, L Feng, LJ Greenhill, BJ Hazelton, L Hernquist, JN Hewitt, N Hurley-Walker, M Johnston-Hollitt

2015-07-10

We confirm our recent prediction of the "pitchfork" foreground signature in power spectra of high-redshift 21 cm measurements wher..

Measuring phased-array antenna beampatterns with high dynamic range for the Murchison Widefield Array using 137MHz ORBCOMM satellites

AR Neben, RF Bradley, JN Hewitt, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, AA Deshpande, R Goeke, LJ Greenhill, BJ Hazelton, M Johnston-Hollitt, DL Kaplan, CJ Lonsdale, SR McWhirter, DA Mitchell, MF Morales, E Morgan, D Oberoi, SM Ord

2015-07-01

Detection of the fluctuations in a 21cm line emission from neutral hydrogen during the Epoch of Reionization in thousand hour inte..

Power spectrum analysis of ionospheric fluctuations with the Murchison Widefield Array

Shyeh Tjing Loi, Cathryn M Trott, Tara Murphy, Iver H Cairns, Martin Bell, Natasha Hurley-Walker, John Morgan, Emil Lenc, AR Offringa, L Feng, PJ Hancock, DL Kaplan, N Kudryavtseva, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, BE Corey, AA Deshpande, D Emrich

2015-07-01

Low-frequency, wide field-of-view (FOV) radio telescopes such as the Murchison Widefield Array (MWA) enable the ionosphere to be s..

GLEAM: The GaLactic and Extragalactic All-Sky MWA Survey

RB Wayth, E Lenc, ME Bell, JR Callingham, KS Dwarakanath, TMO Franzen, B-Q For, B Gaensler, P Hancock, L Hindson, N Hurley-Walker, CA Jackson, M Johnston-Hollitt, AD Kapinska, B McKinley, J Morgan, AR Offringa, P Procopio, L Staveley-Smith, C Wu

2015-06-22

GLEAM, the GaLactic and Extragalactic All-sky MWA survey, is a survey of the entire radio sky south of declination + 25° at freque..

Empirical covariance modeling for 21 cm power spectrum estimation: A method demonstration and new limits from early Murchison Widefield Array 128-tile data

Joshua S Dillon, Abraham R Neben, Jacqueline N Hewitt, Max Tegmark, N Barry, AP Beardsley, JD Bowman, F Briggs, P Carroll, A de Oliveira-Costa, A Ewall-Wice, L Feng, LJ Greenhill, BJ Hazelton, L Hernquist, N Hurley-Walker, DC Jacobs, HS Kim, P Kittiwisit, E Lenc

2015-06-19

The separation of the faint cosmological background signal from bright astrophysical foregrounds remains one of the most daunting ..

Real-time imaging of density ducts between the plasmasphere and ionosphere

Shyeh Tjing Loi, Tara Murphy, Iver H Cairns, Frederick W Menk, Colin L Waters, Philip J Erickson, Cathryn M Trott, Natasha Hurley-Walker, John Morgan, Emil Lenc, Andre R Offringa, Martin E Bell, Ronald D Ekers, BM Gaensler, Colin J Lonsdale, Lu Feng, Paul J Hancock, David L Kaplan, G Bernardi, JD Bowman

2015-05-28

Ionization of the Earth's atmosphere by sunlight forms a complex, multilayered plasma environment within the Earth's magnetosphere..

FOREGROUNDS IN WIDE-FIELD REDSHIFTED 21 cm POWER SPECTRA

Nithyanandan Thyagarajan, Daniel C Jacobs, Judd D Bowman, N Barry, AP Beardsley, G Bernardi, F Briggs, RJ Cappallo, P Carroll, BE Corey, A de Oliveira-Costa, Joshua S Dillon, D Emrich, A Ewall-Wice, L Feng, R Goeke, LJ Greenhill, BJ Hazelton, JN Hewitt, N Hurley-Walker

2015-05-01

Detection of 21 cm emission of H i from the epoch of reionization, at redshifts , is limited primarily by foreground emission. We ..

Serendipitous discovery of a dying Giant Radio Galaxy associated with NGC 1534, using the Murchison Widefield Array

Natasha Hurley-Walker, Melanie Johnston-Hollitt, Ron Ekers, Richard Hunstead, Elaine M Sadler, Luke Hindson, Paul Hancock, Gianni Bernardi, Judd D Bowman, Frank Briggs, Roger Cappallo, Brian Corey, Avinash A Deshpande, David Emrich, Bryan M Gaensler, Robert Goeke, Lincoln Greenhill, Bryna J Hazelton, Jacqueline Hewitt, David L Kaplan

2015-03-01

Recent observations with the Murchison Widefield Array at 185 MHz have serendipitously unveiled a heretofore unknown giant and rel..

The impact of temperature fluctuations on the large-scale clustering of the Ly alpha forest

Bradley Greig, James S Bolton, J Stuart B Wyithe

2015-03-01

We develop a semi-analytic method for assessing the impact of the large-scale IGM temperature fluctuations expected following He I..

The SAMI Galaxy Survey: instrument specification and target selection

JJ Bryant, MS Owers, ASG Robotham, SM Croom, SP Driver, MJ Drinkwater, NPF Lorente, L Cortese, N Scott, M Colless, A Schaefer, EN Taylor, IS Konstantopoulos, JT Allen, I Baldry, L Barnes, AE Bauer, J Bland-Hawthorn, JV Bloom, AM Brooks

2015-03-01

The SAMI Galaxy Survey will observe 3400 galaxies with the Sydney-AAO Multi-object Integral-field spectrograph (SAMI) on the Anglo..

The High Time and Frequency Resolution Capabilities of the Murchison Widefield Array

SE Tremblay, SM Ord, NDR Bhat, SJ Tingay, B Crosse, D Pallot, SI Oronsaye, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, BE Corey, AA Deshpande, D Emrich, R Goeke, LJ Greenhill, BJ Hazelton, M Johnston-Hollitt, DL Kaplan, JC Kasper

2015-02-26

The science cases for incorporating high time resolution capabilities into modern radio telescopes are as numerous as they are com..

THE SPECTRAL VARIABILITY OF THE GHZ-PEAKED SPECTRUM RADIO SOURCE PKS 1718-649 AND A COMPARISON OF ABSORPTION MODELS

SJ Tingay, J-P Macquart, JD Collier, G Rees, JR Callingham, J Stevens, E Carretti, RB Wayth, GF Wong, CM Trott, B McKinley, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, BE Corey, AA Deshpande, D Emrich, BM Gaensler, R Goeke

2015-02-01

Using the new wideband capabilities of the ATCA, we obtain spectra for PKS 1718-649, a well-known gigahertzpeaked spectrum radio s..

Limits on low-frequency radio emission from southern exoplanets with the Murchison Widefield Array

Tara Murphy, Martin E Bell, David L Kaplan, BM Gaensler, Andre R Offringa, Emil Lenc, Natasha Hurley-Walker, G Bernardi, JD Bowman, F Briggs, RJ Cappallo, BE Corey, AA Deshpande, D Emrich, R Goeke, LJ Greenhill, BJ Hazelton, JN Hewitt, M Johnston-Hollitt, JC Kasper

2015-01-21

We present the results of a survey for low-frequency radio emission from 17 known exoplanetary systems with the Murchison Widefiel..

The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes

R Sharp, JT Allen, LMR Fogarty, SM Croom, L Cortese, AW Green, J Nielsen, SN Richards, N Scott, EN Taylor, LA Barnes, AE Bauer, M Birchall, J Bland-Hawthorn, JV Bloom, S Brough, JJ Bryant, GN Cecil, M Colless, WJ Couch

2015-01-11

We present a methodology for the regularization and combination of sparse sampled and irregularly gridded observations from fibre-..

The SAMI Galaxy Survey: Early Data Release

JT Allen, SM Croom, IS Konstantopoulos, JJ Bryant, R Sharp, GN Cecil, LMR Fogarty, C Foster, AW Green, I-T Ho, MS Owers, AL Schaefer, N Scott, AE Bauer, I Baldry, LA Barnes, J Bland-Hawthorn, JV Bloom, S Brough, M Colless

2015-01-11

We present the Early Data Release of the Sydney-AAOMulti-object Integral field spectrograph (SAMI) Galaxy Survey. The SAMI Galaxy ..

Improved Upper Limits on the Stochastic Gravitational-Wave Background from 2009-2010 LIGO and Virgo Data

J Aasi, BP Abbott, R Abbott, T Abbott, MR Abernathy, T Accadia, F Acernese, K Ackley, C Adams, T Adams, P Addesso, RX Adhikari, C Affeldt, M Agathos, N Aggarwal, OD Aguiar, A Ain, P Ajith, A Alemic, B Allen

2014-12-02

Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is exp..

THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES

L Cortese, LMR Fogarty, I-T Ho, K Bekki, J Bland-Hawthorn, M Colless, W Couch, SM Croom, K Glazebrook, J Mould, N Scott, R Sharp, C Tonini, JT Allen, J Bloom, JJ Bryant, M Cluver, RL Davies, MJ Drinkwater, M Goodwin

2014-11-10

We take advantage of the first data from the Sydney-AAO Multi-object Integral field Galaxy Survey to investigate the relation betw..

WSCLEAN: an implementation of a fast, generic wide-field imager for radio astronomy

AR Offringa, B McKinley, N Hurley-Walker, FH Briggs, RB Wayth, DL Kaplan, ME Bell, L Feng, AR Neben, JD Hughes, J Rhee, T Murphy, NDR Bhat, G Bernardi, JD Bowman, RJ Cappallo, BE Corey, AA Deshpande, D Emrich, A Ewall-Wice

2014-10-11

Astronomical wide-field imaging of interferometric radio data is computationally expensive, especially for the large data volumes ..

Implementation of an F-statistic all-sky search for continuous gravitational waves in Virgo VSR1 data

J Aasi, BP Abbott, R Abbott, T Abbott, MR Abernathy, T Accadia, F Acernese, K Ackley, C Adams, T Adams, P Addesso, RX Adhikari, C Affeldt, M Agathos, N Aggarwal, OD Aguiar, A Ain, P Ajith, A Alemic, B Allen

2014-08-21

We present an implementation of the F-statistic to carry out the first search in data from the Virgo laser interferometric gravita..

The cross-power spectrum between 21 cm emission and galaxies in hierarchical galaxy formation models

Jaehong Park, Han-Seek Kim, J Stuart B Wyithe, CG Lacey

2014-03-01

The correlation between 21 cm fluctuations and galaxies is sensitive to the astrophysical properties of the galaxies that drove re..

First Look Murchison Widefield Array observations of Abell 3667

L Hindson, M Johnston-Hollitt, N Hurley-Walker, J Morgan, K Buckley, E Carretti, KS Dwarakanath, M Bell, G Bernardi, R Bhat, F Briggs, AA Deshpande, A Ewall-Wice, L Feng, B Hazeltonm, D Jacobs, D Kaplan, N Kudryavtseva, E Lenc, B McKinley

2014-01-01

The Murchison Widefield Array (MWA) is a new low frequency interferometric radio telescope, operating in the remote Murchison Radi..