MWA Project Meeting - 2024

Session

EoR Science

EoR

29 Aug 2024, 11:20

BC01 (level 0) (BC Building, Swiss Federal Institute of Technology Lausanne (EPFL))

35. Overview of EoR activities from the MWA

Miguel Morales (University of Washington)

29/08/2024, 11:20

Presentation

8. Latest 21cm results from the Australian EoR team

Chuneeta Devi Nunhokee (Curtin University)

29/08/2024, 11:50

Epoch of Reionization (EoR)

Presentation

We present the latest EoR power spectrum results from an initial set of 650 hours from the EoR0 high-band data from 2013-2023. Using the new Hyperdrive calibration software, and a set of QA metrics and thresholds developed by the Australia-based EoR team, and implemented through an efficient Nextflow pipeline, we arrive at a final integration with a subset of the cleanest data. The latest...

2. Trajectory based RFI subtraction and calibration

Chris Finlay (University of Geneva)

29/08/2024, 12:10

Epoch of Reionization (EoR)

Presentation

11. Using beam simulations to model mutual coupling coefficients in the Phase II compact array

Katherine Elder (Arizona State University)

29/08/2024, 13:30

Epoch of Reionization (EoR)

Presentation

Measurement of the 21 cm emission of neutral hydrogen in the intergalactic medium probes the era of the first luminous objects and the era of the intergalactic medium becoming fully ionized by the first stars, the Epoch of Reionization (EoR). However, the 21 cm signal is orders of magnitude fainter than astrophysical foregrounds, as well as other sources of radio frequency interference, making...

14. From Foreground to Signal: Harnessing Deep Learning to Map Neutral Hydrogen During Reionization

Michele Bianco (ETH Zurich)

29/08/2024, 13:50

Epoch of Reionization (EoR)

Presentation

The next generation radio interferometry experiments will be sensible enough not only to detect the 21-cm signal but they will be able to map the distribution of neutral hydrogen during reionization and produce a tremendous amount of 3D tomographic data. The biggest challenge for the observational analysis of these images is to separate the 21-cm signal from the undesired foreground and...

15. A candidate field for deep imaging of the Epoch of Reionization observed with MWA

Cathie Zheng (Shanghai Astronomical Observatory – SHAO)

29/08/2024, 14:10

Epoch of Reionization (EoR)

Presentation

Deep imaging of the structures of the epoch of reionization (EoR) over five targeted fields is selected as one of the highest priority science objective for SKA1. Selecting the ‘clean’ fields is important for the future SKA CD/EoR observations, and pre-observations of the candidate fields with the current radio facilities can help us estimating the computing capabilities to be required for...

18. Excision of Bright Point Source Visibilities from 21cm Data

Michele Bianco (ETH Zurich), Shreyam Parth Krishna (EPFL)

29/08/2024, 14:30

Epoch of Reionization (EoR)

Presentation

21 cm Intensity Mapping probes the universe using the spin-flip transition of the neutral hydrogen atom. This cosmological probe has enormous potential to unravel the nature of our cosmos. Multiple next-generation radio instruments such as the Low-Frequency Array (LOFAR)[1], the Murchison Widefield Array (MWA)[2] and the proposed Square Kilometer Array (SKA)[3] are either currently attempting...