no code implementations • 11 Dec 2020 • B. Marcote, J. R. Callingham, M. De Becker, P. G. Edwards, Y. Han, R. Schulz, J. Stevens, P. G. Tuthill
Such a powerful wind-collision region is consistent with Apep being a binary composed of two WR stars, so far the first unambiguously confirmed system of its kind.
Solar and Stellar Astrophysics High Energy Astrophysical Phenomena
no code implementations • 3 Dec 2020 • K. Ross, J. R. Callingham, N. Hurley-Walker, N. Seymour, P. Hancock, T. M. O. Franzen, J. Morgan, S. V. White, M. E. Bell, P. Patil
We present methodologies for detecting variability in the spectrum between epochs and for classifying the type of variability: either as a change in spectral shape or as a uniform change in flux density across the bandwidth.
Astrophysics of Galaxies
no code implementations • 7 Oct 2019 • A. P. Beardsley, M. Johnston-Hollitt, C. M. Trott, J. C. Pober, J. Morgan, D. Oberoi, D. L. Kaplan, C. R. Lynch, G. E. Anderson, P. I. McCauley, S. Croft, C. W. James, O. I. Wong, C. D. Tremblay, R. P. Norris, I. H. Cairns, C. J. Lonsdale, P. J. Hancock, B. M. Gaensler, N. D. R. Bhat, W. Li, N. Hurley-Walker, J. R. Callingham, N. Seymour, S. Yoshiura, R. C. Joseph, K. Takahashi, M. Sokolowski, J. C. A. Miller-Jones, J. V. Chauhan, I. Bojičić, M. D. Filipović, D. Leahy, H. Su, W. W. Tian, S. J. McSweeney, B. W. Meyers, S. Kitaeff, T. Vernstrom, G. Gürkan, G. Heald, M. Xue, C. J. Riseley, S. W. Duchesne, J. D. Bowman, D. C. Jacobs, B. Crosse, D. Emrich, T. M. O. Franzen, L. Horsley, D. Kenney, M. F. Morales, D. Pallot, K. Steele, S. J. Tingay, M. Walker, R. B. Wayth, A. Williams, C. Wu
The Murchison Widefield Array (MWA) is an open access telescope dedicated to studying the low frequency (80$-$300 MHz) southern sky.
Instrumentation and Methods for Astrophysics
1 code implementation • 19 Nov 2018 • S. Mooney, J. Quinn, J. R. Callingham, R. Morganti, K. Duncan, L. K. Morabito, P. N. Best, G. Gürkan, M. J. Hardcastle, I. Prandoni, H. J. A. Röttgering, J. Sabater, T. W. Shimwell, A. Shulevski, C. Tasse, W. L. Williams
We used the LOFAR Two-Metre Sky Survey (LoTSS) first data release value-added catalogue (LDR1) to study blazars in the low-frequency regime with unprecedented sensitivity and resolution.
High Energy Astrophysical Phenomena
1 code implementation • 16 Nov 2016 • H. Su, N. Hurley-Walker, C. A. Jackson, N. M. McClure-Griffiths, S. J. Tingay, L. Hindson, P. Hancock, R. B. Wayth, B. M. Gaensler, L. Staveley-Smith, J. Morgan, M. Johnston-Hollitt, E. Lenc, M. E. Bell, J. R. Callingham, K. S. Dwarkanath, B. Q. For, A. D. Kapińska, B. McKinley, A. R. Offringa, P. Procopio, C. Wu, Q. Zheng
Using a low-frequency radio telescope, the Murchison Widefield Array (MWA), we measure the free-free absorption of this Galactic synchrotron emission by intervening HII regions along the line of sight.
Astrophysics of Galaxies
