Rachel Webster

Economic Performance Indicators for a Geothermal Aquatic Center in Victoria, Australia

B Fu, G Beardsmore, R Webster

Journal article  |  2023  |  Energies

The Gippsland Regional Aquatic Centre (GRAC) opened in the town of Traralgon, Victoria, Australia early in 2021. The GRAC utilizes..

AllBRICQS: the All-sky BRIght, Complete Quasar Survey

CA Onken, C Wolf, WJ Hon, S Lai, P Tisserand, R Webster

Journal article  |  2023  |  Publications of the Astronomical Society of Australia

We describe the first results from the All-sky BRIght, Complete Quasar Survey (AllBRICQS), which aims to discover the last remaini..

SkyMapper colours of Seyfert galaxies and changing-look AGN - II. Newly discovered changing-look AGN

Wei Jeat Hon, Christian Wolf, Christopher A Onken, Rachel Webster, Katie Auchettl

Journal article  |  2022  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Changing-look active galactic nuclei (CLAGN) are AGN that change type as their broad emission lines appear or disappear, which is ..

Epoch of reionization power spectrum limits from Murchison Widefield Array data targeted at EoR1 field

M Rahimi, B Pindor, JLB Line, N Barry, CM Trott, RL Webster, CH Jordan, M Wilensky, S Yoshiura, A Beardsley, J Bowman, R Byrne, A Chokshi, BJ Hazelton, K Hasegawa, E Howard, B Greig, D Jacobs, R Joseph, M Kolopanis, et al.

Journal article  |  2021  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Current attempts to measure the 21 cm power spectrum of neutral hydrogen during the epoch of reionization (EoR) are limited by sys..

Constraining the 21 cm brightness temperature of the IGM at z=6.6 around LAEs with the murchison widefield array

CM Trott, CH Jordan, JLB Line, CR Lynch, S Yoshiura, B McKinley, P Dayal, B Pindor, A Hutter, K Takahashi, RB Wayth, N Barry, A Beardsley, J Bowman, R Byrne, A Chokshi, B Greig, K Hasegawa, BJ Hazelton, E Howard, et al.

Journal article  |  2021  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

The locations of Ly α-emitting galaxies (LAEs) at the end of the Epoch of Reionization (EoR) are expected to correlate with region..

A new MWA limit on the 21 cm power spectrum at redshifts similar to 13-17

S Yoshiura, B Pindor, JLB Line, N Barry, CM Trott, A Beardsley, J Bowman, R Byrne, A Chokshi, BJ Hazelton, K Hasegawa, E Howard, B Greig, D Jacobs, CH Jordan, R Joseph, M Kolopanis, C Lynch, B McKinley, DA Mitchell, et al.

Journal article  |  2021  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Observations in the lowest Murchison Widefield Array (MWA) band between 75 and 100 MHz have the potential to constrain the distrib..

Evidence for an intermediate-mass black hole from a gravitationally lensed gamma-ray burst

James Paynter, Rachel Webster, Eric Thrane

Journal article  |  2021  |  NATURE ASTRONOMY

If gamma-ray bursts are at cosmological distances, they must be gravitationally lensed occasionally1,2. The detection of lensed im..

Dual polarization measurements of MWA beampatterns at 137 MHz

A Chokshi, JLB Line, N Barry, D Ung, D Kenney, A McPhail, A Williams, RL Webster

Journal article  |  2021  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

The wide adoption of low-frequency radio interferometers as a tool for deeper and higher resolution astronomical observations has ..

Exploring reionization and high-z galaxy observables with recent multiredshift MWA upper limits on the 21-cm signal

Bradley Greig, Cathryn M Trott, Nichole Barry, Simon J Mutch, Bart Pindor, Rachel L Webster, J Stuart B Wyithe

Journal article  |  2021  |  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

We use the latest multiredshift (z = 6.5-8.7) upper limits on the 21-cm signal from the Murchison Widefield Array (MWA) to explore..

The impact of tandem redundant/sky-based calibration in MWA Phase II data analysis

Zheng Zhang, Jonathan C Pober, Wenyang Li, Bryna J Hazelton, Miguel F Morales, Cathryn M Trott, Christopher H Jordan, Ronniy C Joseph, Adam Beardsley, Nichole Barry, Ruby Byrne, Steven J Tingay, Aman Chokshi, Kenji Hasegawa, Daniel C Jacobs, Adam Lanman, Jack LB Line, Christene Lynch, Benjamin McKinley, Daniel A Mitchell, et al.

Journal article  |  2020  |  Publications of the Astronomical Society of Australia

Precise instrumental calibration is of crucial importance to 21-cm cosmology experiments. The Murchison Widefield Array’s (MWA) Ph..