Conveners
Techniques
- Kathryn Ross (ICRAR - Curtin)
Techniques
- Shane O'Sullivan (Universidad Complutense de Madrid)
Description
Methods, Techniques, imaging, pipelines etc
The Evolutionary Map of the Universe (EMU) survey is an ongoing large-scale radio continuum survey conducted by ASKAP, which will discover around 40 million radio sources. While conventional source-finding algorithms could handle ~90% of source cataloguing in EMU, there might be 4 million sources with well-extended and complex morphological structures awaited to be identified through visual...
We present source detection and catalogue construction pipelines to build the first catalogue of radio galaxies from the 270 $\rm deg^2$ pilot survey of the Evolutionary Map of the Universe (EMU-PS) conducted with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The detection pipeline uses Gal-DINO computer-vision networks (Gupta et al. 2023a) to predict the categories and...
Measuring redshifts of radio sources is extremely important but extremely hard. I have been searching for the optimum machine learning algorithms to measure the redshifts of radio sources. One of the reasons that radio sources are visible at higher redshift is because of the active supermassive black hole at the centre of the galaxy. But this is also the reason a lot of traditional methods...
Upcoming radio sky survey projects, such as the Square Kilometer Array (SKA), are anticipated to collect vast amounts of observational data, encompassing the spatial and frequency distribution of various celestial objects. The detection and segmentation of these celestial objects from the observational data are crucial for further scientific investigation. However, directly detecting celestial...
Thousands of observations of the well-studied Galaxy and Mass Assem-
bly (GAMA) fields, GAMA9 and GAMA23, have been conducted with the
MWA (Murchinson Widefield Array) radio telescope for the MWA Interestingly
Deep Astrophysical Survey (MIDAS) and the GAMA23 OverwheLming Deep
(GOLD) survey. Here we present deep images of the GAMA9 and GAMA23
fields centered at a frequency of 215.68 MHz...
In the latest few years, a series of exciting discoveries by SKA's precursors and pathfinders have made the life of theorists harder, by showing that a plethora of new complex information must be accounted for in order to explain observations: the topology of magnetic fields, the actual details of their origin, the complex life cycle of radio galaxies within their halos, the time dependent...
The MIGHTEE (MeerKAT International GHz Tiered Extragalactic Exploration) survey has emerged as a groundbreaking initiative, leveraging the unprecedented capabilities of the MeerKAT radio telescope array to explore the depths of the radio sky. Even if its primary focus is on extragalactic sources, MIGHTEE can push forward the study of late-type stars through stacking techniques. .
Stars,...
In this talk, I will discuss our efforts to explore the dynamic radio sky with LOFAR, the Low Frequency Array. Using automated transient pipelines, we have performed blind transient searches on various fields. I will specifically focus on the searches for transient sources on timescales of seconds to hours. In this regime, the main challenge is to image the data, and I will discuss various...
With the increased sensitivity and field of view of SKA pathfinders, dynamic imaging (that is, imaging the time axis) is becoming a burgeoning field yielding rich new discoveries of transients and variable sources. MeerKAT is capable of reaching sub-150 uJy image rms in an 8s integration, which opens up studies of variability on much shorter timescales than was possible with previous...
MeerKLASS, the MeerKAT Large Area Synoptic Survey, aims to survey large areas of the sky with MeerKAT in order to probe cosmology using the single-dish HI intensity mapping technique while producing continuum images with the interferometer. The target is to cover 10,000 square deg on the UHF band with 25 uJy rms and 13’’ resolution (a new survey in the L-band with the MeerKAT extension aiming...
