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The Spectral Energy Distribution of Powerful Starburst Galaxies I : Modelling the Radio Continuum
(2018-02-01)
We have acquired radio-continuum data between 70MHz and 48 GHz for a sample of 19 southern starburst galaxies at moderate redshifts (0.067 < z < 0.227) with the aim of separating synchrotron and free-free emission components. ...
Calibration and Stokes Imaging with Full Embedded Element Primary Beam Model for the Murchison Widefield Array
(2017-11-27)
The Murchison Widefield Array (MWA), located in Western Australia, is one of the low-frequency precursors of the international Square Kilometre Array (SKA) project. In addition to pursuing its own ambitious science program, ...
A high resolution foreground model for the MWA EoR1 field : model and implications for EoR power spectrum analysis
(2017-08-10)
The current generation of experiments aiming to detect the neutral hydrogen signal from the Epoch of Reionisation (EoR) is likely to be limited by systematic effects associated with removing foreground sources from target ...
A search for long-timescale, low-frequency radio transients
(2017-04-11)
We present a search for transient and highly variable sources at low radio frequencies (150-200 MHz) that explores long timescales of 1-3 years. We conducted this search by comparing the TIFR GMRT Sky Survey Alternative ...
Spectral energy distribution and radio halo of NGC253 at low radio frequencies
(2017-03-27)
We present new radio continuum observations of NGC253 from the Murchison Widefield Array at frequencies between 76 and 227 MHz. We model the broadband radio spectral energy distribution for the total flux density of NGC253 ...
Galactic synchrotron emissivity measurements between 250° MWA
(2017-03-01)
Synchrotron emission pervades the Galactic plane at low radio frequencies, originating from cosmic ray electrons interacting with the Galactic magnetic field. Using a low-frequency radio telescope, the Murchison Widefield ...
Extragalactic Peaked-Spectrum Radio Sources at Low Frequencies
(2017-02-20)
We present a sample of 1,483 sources that display spectral peaks between 72 MHz and 1.4 GHz, selected from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. The GLEAM survey is the widest ...
Low Radio Frequency Observations and Spectral Modelling of the Remnant of Supernova 1987A
(2016-10-11)
We present Murchison Widefield Array observations of the supernova remnant (SNR) 1987A between 72 and 230 MHz, representing the lowest frequency observations of the source to date. This large lever arm in frequency space ...
Low frequency observations of linearly polarized structures in the interstellar medium near the south Galactic pole
(2016-10-10)
We present deep polarimetric observations at 154 MHz with the Murchison Widefield Array (MWA), covering 625 deg^2 centered on RA=0 h, Dec=-27 deg. The sensitivity available in our deep observations allows an in-band, ...
A Large Scale, Low Frequency Murchison Widefield Array Survey of Galactic HII regions between 260\340
(2016-05-17)
We have compiled a catalogue of HII regions detected with the Murchison Widefield Array (MWA) between 72 and 231MHz. The multiple frequency bands provided by the MWA allow us identify the characteristic spectrum generated ...