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On the Detectability of the Hydrogen 3-cm Fine Structure Line from the EoR
Mark Dijkstra, Adam Lidz, Jonathan R. Pritchard +4
A soft ultraviolet radiation field, 10.2 eV < E <13.6 eV, that permeates neutral intergalactic gas during the Epoch of Reionization (EoR) excites the 2p (directly) and 2s (indirect…
Real-Time Calibration of the Murchison Widefield Array
D. A. Mitchell, L. J. Greenhill, R. B. Wayth +5
The interferometric technique known as peeling addresses many of the challenges faced when observing with low-frequency radio arrays, and is a promising tool for the associated cal…
Detection of Crab Giant Pulses Using the Mileura Widefield Array Low Frequency Demonstrator Field Prototype System
N. D. Ramesh Bhat, Randall B. Wayth, Haydon S. Knight +14
We report on the detection of giant pulses from the Crab Nebula pulsar at a frequency of 200 MHz using the field deployment system designed for the Mileura Widefield Array's Low Fr…
Field Deployment of Prototype Antenna Tiles for the Mileura Widefield Array--Low Frequency Demonstrator
Judd D. Bowman, David G. Barnes, Frank H. Briggs +22
Experiments were performed with prototype antenna tiles for the Mileura Widefield Array--Low Frequency Demonstrator (MWA-LFD) to better understand the widefield, wideband propertie…
Lensview: Software for modelling resolved gravitational lens images
Randall B. Wayth, Rachel L. Webster
We have developed a new software tool, Lensview, for modelling resolved gravitational lens images. Based on the LensMEM algorithm, the software finds the best fitting lens mass mod…
A microlensing measurement of the size of the broad emission line region in the lensed QSO 2237+0305
Randall B. Wayth, Matthew O'Dowd, Rachel L. Webster
We present spatially resolved spectroscopic images of the gravitationally lensed QSO 2237+0305 taken with the GMOS Integral Field Unit (IFU) on the Gemini North telescope. These ob…
The lens and source of the optical Einstein ring gravitational lens ER 0047-2808
Randall B. Wayth, Stephen J. Warren, Geraint F. Lewis +1
(Abridged) We perform a detailed analysis of the optical gravitational lens ER 0047-2808 imaged with WFPC2 on the Hubble Space Telescope. Using software specifically designed for t…
H1517+656: the Birth of a BL Lac Object?
Matthew O'Dowd, C. Megan Urry, Riccardo Scarpa +2
H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lacs known, with extreme emission properties at radio, optical, and X-ray frequencies. F…
The dark matter halo of the gravitational lens galaxy 0047-2808
Randall B. Wayth, Rachel L. Webster
The location of the images in a multiple-image gravitational lens system are strongly dependent on the orientation angle of the mass distribution. As such, we can use the location…