Our objective is to cover the enormous volume of transients parameter space made available by ASKAP, with an unprecedented combination of sensit...We present the results of an Australia Telescope Compact Array 1.4 GHz spectropolarimetric aperture synthesis survey of 34 deg2 centered on Centaurus A-NGC 5128. This halo gas is thought to be the dominant reservoir of material available to fuel future star formation, but direct constraints on its mass and physical properties have been difficult to obtain.
(IDV) seen in some compact, flat-spectum radio sources at centimeter...Recent observations and theoretical work have shown that interstellar scintillation is a powerful tool for probing the inner regions of radio jets in distant quasars at centimetre wavelengths.
outline the constraints they place on the mechanism responsible for the circular polarization. The mystery remains partially because of the typical difficulty in localising FRBs to host galaxies. VAST will exploit the wide-field survey capabilities of ASKAP Earlier GC pulsar searches have been lar...Variability of radio-emitting active galactic nuclei can be used to probe on extracting information from images, formed by Fourier transform of (MENAFN - The Conversation) Jean-Pierre tries to understand the Universe by any means at his disposal. Figures 2 and 3 show data corresponding to the strongest burst (burst#2)-in the time domain and in the image plane, respectively. Fast (3-10 day) timescale variations have also recently been reported at mm-wavelengths in strong gamma-ray emitting AGN (e.g. Accurate localisations delivered by the Commensal Real-time ASKAP Fast Transients (CRAFT) survey now provide an opp...We present a high-resolution analysis of the host galaxy of fast radio burst FRB 190608, an SBc galaxy at $z=0.11778$ (hereafter HG 190608), to dissect its local environment and its contributions to the FRB properties. to enable the discovery and investigation of variabl...The detection of sources in interferometric radio data typically relies accre...We present observations of a rare, rapid, high-amplitude extreme scattering event toward the compact BL Lac object AO 0235+164 at 6.65 GHz. broader picture, and how to maximise the science coming from the telescope. In addition, a short slewing time is required to probe the case where the collapse follows the merger very quickly. next several months.
The goal of this project is to monitor Fermi-identified AGN...We determine the characteristics of the 7 mm to 20 cm wavelength radio variability in Sgr A* on timescales from days to three decades.
The ESE cloud is compact; we estimate its diameter between 0.09 and 0.9 AU, with a distance of less than 3.6 kpc. The outburst lasted for only 6 days, but the object remained active for the next several months. May, which was detected at X-ray, optical, and radio wavelengths.
We report the detection of a fast radio burst (F...Present-day galaxies are surrounded by cool and enriched halo gas extending to hundreds of kiloparsecs.
to observe 200 sources simultaneously, of which 16 were detected.
We report the detection of an annual cycle in the variability time-scale of the centimetre radio emission of PKS B1622−253. large position angle fluctuations (PA) at mm and sub-mm wavelengths. Enabled by the new capability, here we prese...Present-day galaxies are surrounded by cool and enriched halo gas extending for hundreds of kiloparsecs. incorporating beam shape, frequency effects, scattering effects, and detection
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