Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Hayley Bignall"'
Autor:
Jamie McCallum, Gabor Orosz, Hayley Bignall, Simon Ellingsen, Stanislav S. Shabala, N. M. M. Said, C. S. Reynolds, Jun Liu
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 508:2881-2896
We have investigated the evolution of the BL Lac object PKS B1144−379 using the University of Tasmania Ceduna 30-m radio telescope at a frequency of 6.7 GHz and very long baseline interferometry (VLBI) data at 8.6 GHz. Variability time-scales assoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c8fd145c19afd21959340809840826d
https://doi.org/10.1093/mnras/stab2724
https://doi.org/10.1093/mnras/stab2724
Autor:
Stanislav S. Shabala, Jamie McCallum, Simon Ellingsen, C. S. Reynolds, Jun Liu, Hayley Bignall, N. M. M. Said
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 506:288-297
The highly variable BL Lac object PKS B1144 − 379 was monitored at 6.7 GHz using the Ceduna Radio Telescope with high cadence from 2003 to 2011. Intraday variations due to interstellar scintillation (ISS) were observed throughout the period. To com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69440646eac90cd76693c479a6eb2da4
https://doi.org/10.1093/mnras/stab1651
https://doi.org/10.1093/mnras/stab1651
Autor:
Jamie McCallum, Hayley Bignall, N. M. M. Said, Stanislav S. Shabala, C. S. Reynolds, Simon Ellingsen
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 498:4615-4634
The University of Tasmania Ceduna radio telescope has been used to investigate rapid variability in the radio flux density of the BL Lac object PKS B1144-379 at 6.7 GHz. High-cadence monitoring of this extreme scintillator was carried out over a peri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f5cf04bea52024817d82a39875a71c2
https://doi.org/10.1093/mnras/staa2642
https://doi.org/10.1093/mnras/staa2642
The Australian Square Kilometre Array Pathfinder: Performance of the Boolardy Engineering Test Array
Autor:
John Reynolds, Hayley Bignall, Anastasios Tzioumis, E. S. Lensson, J. Marvil, John D. Bunton, Emil Lenc, C. Jacka, J. Tuthill, Aaron Chippendale, Ray P. Norris, D. Brodrick, P. Axtens, Keith W. Bannister, M. Shields, S. Mackay, Paolo Serra, S. W. Amy, A. Ng, Matthew Whiting, Ilana Feain, Naomi McClure-Griffiths, T. Bateman, R. G. Gough, E. R. Troup, Wasim Raja, Robert J. Sault, S. Hoyle, Sarah Pearce, Maxim Voronkov, Aidan Hotan, M. Storey, Douglas B. Hayman, David DeBoer, Douglas C.-J. Bock, J. C. Guzman, K. Jeganathan, Daniel A. Mitchell, A. Macleod, A. E. T. Schinckel, James R. Allison, W. Cheng, R. M. Wark, S. Neuhold, R. Bolton, S. Hegarty, B. Turner, Timothy W. Shimwell, C. A. Jackson, Lisa Harvey-Smith, Martin Bell, Stuart G. Hay, Tobias Westmeier, Carol D. Wilson, M. Marquarding, A. Brown, Tim J. Cornwell, B. Humphreys, I. Heywood, M. Leach, Grant Hampson, T. Wilson, N. Gupta, David McConnell, L. Ball, R. Y. Qiao, Philip G. Edwards, Balthasar T. Indermuehle, J. Joseph, Attila Popping, Baerbel Koribalski, S. Jackson, P. Mirtschin
Publikováno v:
Publications of the Astronomical Society of Australia, 33, e042
We describe the performance of the Boolardy Engineering Test Array (BETA), the prototype for the Australian Square Kilometre Array Pathfinder telescope ASKAP. BETA is the first aperture synthesis radio telescope to use phased array feed technology, g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfb0e6c47d0f320290b46ee213d007ea
https://ora.ox.ac.uk/objects/uuid:094734d0-c3fc-4603-a293-00915eae0728
https://ora.ox.ac.uk/objects/uuid:094734d0-c3fc-4603-a293-00915eae0728
Autor:
C. S. Reynolds, Simon Johnston, Jamie Stevens, Matthew Kratzer, Stuart Weston, Keith W. Bannister, Artem V. Tuntsov, Sergei Gulyaev, Tim Natusch, Hayley Bignall, Mark Walker, N. M. M. Said
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 487:4372-4381
PKS B1322-110 is a radio quasar that is located only 8.5' in angular separation from the bright B star Spica. It exhibits intra-day variability in its flux density at GHz frequencies attributed to scintillations from plasma inhomogeneities. We have t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8727054cfccd8b7537a6cfe0596c071b
https://doi.org/10.1093/mnras/stz1559
https://doi.org/10.1093/mnras/stz1559
Autor:
Mischa Schirmer, Keith W. Bannister, Cormac Reynolds, Simon Johnston, Jamie Stevens, Hayley Bignall, Mark A. Walker, Juan P. Madrid, Artem V. Tuntsov, Carlos J. Donzelli
Observations with the Australia Telescope Compact Array revealed intrahour variations in the radio source PKS B1322-110. As part of an optical follow-up, we obtained Gemini Hα and Hα continuum (HαC) images of the PKS B1322-110 field. A robust 19σ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9da513ed722a0e2fac8cf022e5a8e22
http://arxiv.org/abs/2009.06447
http://arxiv.org/abs/2009.06447
Autor:
Jamie McCallum, A. S. Andrianov, J. R. Rizzo, M. S. Burgin, C. García-Miró, Paweł Wolak, E. V. Kravchenko, Yu. A. Kovalev, M. V. Shatskaya, Tuomas Savolainen, James M. Anderson, Alexander B. Pushkarev, A. V. Kovalenko, G. Giovannini, N. N. Shakhvorostova, Marcello Giroletti, A. M. Kutkin, I. A. Rakhimov, Mikhail M. Lisakov, V. I. Kostenko, Norbert Bartel, Sándor Frey, I. N. Pashchenko, Magdalena Kunert-Bajraszewska, Zhi-Qiang Shen, Tapasi Ghosh, D. G. Nair, P. de Vicente, Ivan Litovchenko, Kirill Sokolovsky, J. A. Zensus, Philip G. Edwards, Antonis Polatidis, Shinji Horiuchi, Anastasios Melis, V. A. Zuga, Frank D. Ghigo, Jun Yi Koay, Tao An, P. A. Voitsik, S. F. Likhachev, J. F. H. Quick, I. A. Girin, Marcin P. Gawronski, David L. Jauncey, M. A. Kharinov, C. S. Reynolds, A. E. Melnikov, N. S. Kardashev, Simon Ellingsen, V. Yu. Avdeev, Hayley Bignall, D. V. Ivanov, R. C. Vermeulen, Leonid I. Gurvits, Chris Phillips, Yuri Y. Kovalev, M. A. Shchurov, Alexey Rudnitskiy, Carlo Migoni
Publikováno v:
Advances in Space Research
The largest Key Science Program of the RadioAstron space VLBI mission is a survey of active galactic nuclei (AGN). The main goal of the survey is to measure and study the brightness of AGN cores in order to better understand the physics of their emis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::772671b24e947bad6776e168efdff4be
https://aaltodoc.aalto.fi/handle/123456789/43103
https://aaltodoc.aalto.fi/handle/123456789/43103
Autor:
Tom Oosterloo, Tasso Tzioumis, Raffaella Morganti, Cormac Reynolds, Clive Tadhunter, J. B. Raymond Oonk, Hayley Bignall
Publikováno v:
Astronomy and astrophysics, 632(December 2019):A66. EDP Sciences
Astronomy and Astrophysics (0004-6361), 632, A66
Astronomy and Astrophysics (0004-6361), 632, A66
We present CO(1-0) and CO(3-2) ALMA observations of the molecular gas in PKS 1549-79, as well as mm and VLBI 2.3-GHz continuum observations of its radio jet. PKS 1549-79 is one of the closest young, radio-loud quasars caught in an on-going merger in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::125eff5c056b7c12e0d61e4d7d391605
http://arxiv.org/abs/1910.07865
http://arxiv.org/abs/1910.07865
Autor:
Talvikki Hovatta, Anthony C. S. Readhead, David L. Jauncey, T. J. Pearson, Harish Vedantham, C. S. Reynolds, Jun Yi Koay, Hayley Bignall, Rodrigo Reeves, Walter Max-Moerbeck, Sebastian Kiehlmann
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 489(4), 5365-5380. Oxford University Press
We have conducted the first systematic search for interday variability in a large sample of extragalactic radio sources at 15 GHz. From the sample of 1158 radio-selected blazars monitored over a $\sim$10 year span by the Owens Valley Radio Observator
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea664194af8365591184992bc097a178
http://arxiv.org/abs/1909.01566
http://arxiv.org/abs/1909.01566
Autor:
Yuri Y. Kovalev, Hayley Bignall, Giuseppe Cimo, Alex Kraus, Anton Zensus, Kirill Sokolovsky, Xiang Liu, Thomas P. Krichbaum, Jun Liu
The RadioAstron space radio telescope provides a unique opportunity to study the extreme brightness temperatures ($\mathrm{T_B }$) in AGNs with unprecedented long baselines of up to 28 Earth diameters. Since interstellar scintillation (ISS) may affec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f78d8e985b61f46a06d0fad1663296a3