Hintze Centre for Astrophysical Surveys

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A spectroscopic, photometric, polarimetric, and radio study of the eclipsing polar UZ Fornacis: the first simultaneous SALT and MeerKAT observations

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 492:3 (2020) 4298-4312

Authors:

ZN Khangale, SB Potter, PA Woudt, DAH Buckley, AN Semena, EJ Kotze, DN Groenewald, DM Hewitt, ML Pretorius, RP Fender, P Groot, S Bloemen, M Klein-Wolt, E Körding, R Le Poole, VA McBride, L Townsend, K Paterson, DLA Pieterse, P Vreeswijk
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The Karl G. Jansky very large array sky survey (VLASS). Science case and survey design

Publications of the Astronomical Society of the Pacific 132:1009 (2020)

Authors:

M Lacy, SA Baum, CJ Chandler, S Chatterjee, TE Clarke, S Deustua, J English, J Farnes, BM Gaensler, N Gugliucci, G Hallinan, BR Kent, A Kimball, CJ Law, TJW Lazio, J Marvil, SA Mao, D Medlin, K Mooley, EJ Murphy, S Myers, R Osten, GT Richards, E Rosolowsky, L Rudnick, F Schinzel, GR Sivakoff, LO Sjouwerman, R Taylor, RL White, J Wrobel, H Andernach, AJ Beasley, E Berger, S Bhatnager, M Birkinshaw, GC Bower, WN Brandt, S Brown, S Burke-Spolaor, BJ Butler, J Comerford, PB Demorest, H Fu, S Giacintucci, K Golap, T Güth, CA Hales, R Hiriart, J Hodge

Abstract:

© 2020. The Astronomical Society of the Pacific. The Very Large Array Sky Survey (VLASS) is a synoptic, all-sky radio sky survey with a unique combination of high angular resolution (≈2.″5), sensitivity (a 1σ goal of 70 μJy/beam in the coadded data), full linear Stokes polarimetry, time domain coverage, and wide bandwidth (2–4 GHz). The first observations began in 2017 September, and observing for the survey will finish in 2024. VLASS will use approximately 5500 hr of time on the Karl G. Jansky Very Large Array (VLA) to cover the whole sky visible to the VLA (decl. > −40°), a total of 33 885 deg2. The data will be taken in three epochs to allow the discovery of variable and transient radio sources. The survey is designed to engage radio astronomy experts, multi-wavelength astronomers, and citizen scientists alike. By utilizing an “on the fly” interferometry mode, the observing overheads are much reduced compared to a conventional pointed survey. In this paper, we present the science case and observational strategy for the survey, and also results from early survey observations.
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The rise and fall of an extraordinary Ca-rich transient

Astronomy & Astrophysics EDP Sciences 635 (2020) a186

Authors:

SJ Prentice, K Maguire, A Flörs, S Taubenberger, C Inserra, C Frohmaier, TW Chen, JP Anderson, C Ashall, P Clark, M Fraser, L Galbany, A Gal-Yam, M Gromadzki, CP Gutiérrez, PA James, PG Jonker, E Kankare, G Leloudas, MR Magee, PA Mazzali, M Nicholl, M Pursiainen, K Skillen, SJ Smartt, KW Smith, C Vogl, DR Young
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LSQ13ddu: a rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 492:2 (2020) 2208-2228

Authors:

Peter Clark, Kate Maguire, Cosimo Inserra, Simon Prentice, Stephen J Smartt, Carlos Contreras, Griffin Hossenizadeh, Eric Y Hsiao, Erkki Kankare, Mansi Kasliwal, Peter Nugent, Melissa Shahbandeh, Charles Baltay, David Rabinowitz, Iair Arcavi, Chris Ashall, Christopher R Burns, Emma Callis, Ting-Wan Chen, Tiara Diamond, Morgan Fraser, D Andrew Howell, Emir Karamehmetoglu, Rubina Kotak, Joseph Lyman, Nidia Morrell, Mark Phillips, Giuliano Pignata, Miika Pursiainen, Jesper Sollerman, Maximilian Stritzinger, Mark Sullivan, David Young
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The faint radio source population at 15.7 GHz – IV. The dominance of core emission in faint radio galaxies

Monthly Notices of the Royal Astronomical Society Oxford University Press 493:2 (2020) 2841-2853

Authors:

Imogen Whittam, DA Green, Matthew Jarvis, JM Riley

Abstract:

We present 15-GHz Karl G. Jansky Very Large Array observations of a complete sample of radio galaxies selected at 15.7 GHz from the Tenth Cambridge (10C) survey. 67 out of the 95 sources (71 per cent) are unresolved in the new observations and lower frequency radio observations, placing an upper limit on their angular size of ∼2 arcsec. Thus, compact radio galaxies, or radio galaxies with very faint jets, are the dominant population in the 10C survey. This provides support for the suggestion in our previous work that low-luminosity (⁠L<1025W~Hz−1⁠) radio galaxies are core dominated, although higher resolution observations are required to confirm this directly. The 10C sample of compact, high-frequency selected radio galaxies is a mixture of high-excitation and low-excitation radio galaxies and displays a range of radio spectral shapes, demonstrating that they are a mixed population of objects.
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