Zobrazeno 1 - 10
of 23
pro vyhledávání: '"R. C. Joseph"'
Autor:
Eric Howard, Keitaro Takahashi, M. Wilensky, Bryna J. Hazelton, Christene Lynch, R. C. Joseph, B. Pindor, S. Yoshiura, M. Rahimi, J. L. B. Line, Matthew Kolopanis, Bradley Greig, B. McKinley, Daniel C. Jacobs, Steven Tingay, Jonathan C. Pober, Judd D. Bowman, Zheng Zhang, Randall B. Wayth, A. Chokshi, Christopher H. Jordan, R. Byrne, Rachel L. Webster, Nichole Barry, Adam P. Beardsley, J. S. B. Wyithe, Keisuke Hasegawa, Daniel A. Mitchell, Cathryn M. Trott, Miguel F. Morales, Qian Zheng, Steven G. Murray
Observations in the lowest MWA band between $75-100$ MHz have the potential to constrain the distribution of neutral hydrogen in the intergalactic medium at redshift $\sim 13-17$. Using 15 hours of MWA data, we analyse systematics in this band such a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b146f6d1f8fd0d56e1015af66a6a8ef
Autor:
Daniel C. Jacobs, Nichole Barry, Judd D. Bowman, Cathryn M. Trott, M. Wilensky, Miguel F. Morales, Bartosz Pindor, Eric Howard, Q. Zheng, Adam P. Beardsley, Rachel L. Webster, Randall B. Wayth, J. L. B. Line, Bradley Greig, Daniel A. Mitchell, Jonathan C. Pober, Benjamin McKinley, Bryna J. Hazelton, R. Byrne, J. S. B. Wyithe, Christopher H. Jordan, Kenji Hasegawa, Matthew Kolopanis, Steven Tingay, Masoud Rahimi, Shintaro Yoshiura, Keitaro Takahashi, Christene Lynch, R. C. Joseph, S. Murray, A. Chokshi
Current attempts to measure the 21cm Power Spectrum of neutral hydrogen during the Epoch of Reionization are limited by systematics which produce measured upper limits above both the thermal noise and the expected cosmological signal. These systemati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4cb0060fad74d560ba43a8c39339dd4
Science with the Murchison Widefield Array: Phase I results and Phase II opportunities – Corrigendum
Autor:
B. W. Meyers, M. D. Filipovic, Tessa Vernstrom, S. Yoshiura, Ray P. Norris, Bryan Gaensler, D. Kenney, R. B. Wayth, Paul Hancock, David Emrich, W. W. Tian, M. Walker, L. Horsley, C. J. Lonsdale, C. J. Riseley, G. Gürkan, Steven Tingay, D. A. Leahy, Melanie Johnston-Hollitt, Christene Lynch, R. C. Joseph, Patrick I. McCauley, Judd D. Bowman, Iver H. Cairns, Marcin Sokolowski, Chenoa D. Tremblay, John Morgan, Divya Oberoi, Jonathan C. Pober, S. W. Duchesne, A. P. Beardsley, O. I. Wong, Nick Seymour, Keitaro Takahashi, James Miller-Jones, Brian Crosse, S. Kitaeff, Ivan S. Bojičić, K. Steele, S. J. McSweeney, T. M. O. Franzen, G. E. Anderson, Daniel Jacobs, Jai Verdhan Chauhan, Andrew R. Williams, D. Pallot, George Heald, Mengyao Xue, Cathryn M. Trott, Miguel F. Morales, S. D. Croft, H. Su, C. W. James, Joseph R. Callingham, Natasha Hurley-Walker, W. Li, Chen Wu, David L. Kaplan, N. D. R. Bhat
Publikováno v:
Publications of the Astronomical Society of Australia. 37
Autor:
Nichole Barry, Adam Lanman, Wenyang Li, Q. Zheng, M. Wilensky, Randall B. Wayth, Kenji Hasegawa, Daniel A. Mitchell, Christopher H. Jordan, Rachel L. Webster, Jonathan C. Pober, R. Byrne, Cathryn M. Trott, Steven Tingay, Miguel F. Morales, M. Rahimi, Bryna J. Hazelton, J. L. B. Line, Daniel C. Jacobs, Zheng Zhang, A. Chokshi, Steven G. Murray, Keitaro Takahashi, Shintaro Yoshiura, Christene Lynch, R. C. Joseph, B. Pindor, Benjamin McKinley, Adam P. Beardsley
Publikováno v:
Publications of the Astronomical Society of Australia. 37
Precise instrumental calibration is of crucial importance to 21-cm cosmology experiments. The Murchison Widefield Array's (MWA) Phase II compact configuration offers us opportunities for both redundant calibration and sky-based calibration algorithms
Detecting a signal from the Epoch of Reionisation (EoR) requires an exquisite understanding of galactic and extra-galactic foregrounds, low frequency radio instruments, instrumental calibration, and data analysis pipelines. In this work we build upon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d48add883f85b3d56e2bf3a1aa7ea4ef
http://arxiv.org/abs/1911.13088
http://arxiv.org/abs/1911.13088
Autor:
R. C. Joseph
Publikováno v:
Proceedings of the International Astronomical Union. 12:118-121
The latest generation of low frequency radio interferometers, e.g. LOFAR, MWA, PAPER, has been pushing down the detection limits on the hydrogen signal from the Epoch of Reionisation. However, due to the challenges posed by foregrounds and instrument
Autor:
Rachel L. Webster, Keitaro Takahashi, J. L. B. Line, Jonathan C. Pober, R. Byrne, Christene Lynch, R. C. Joseph, Christopher H. Jordan, Steven G. Murray, B. Pindor, M. Wilensky, Bryna J. Hazelton, Nichole Barry, Steven Tingay, B. McKinley, Daniel A. Mitchell, Shintaro Yoshiura, Kenji Kubota, W. Li, M. Walker, J. S. B. Wyithe, Kenji Hasegawa, Shih Ching Fu, Cathryn M. Trott, Miguel F. Morales, Q. Zheng, Randall B. Wayth, T. Kaneuji, M. Rahimi
We explore methods for robust estimation of the 21 cm signal from the Epoch of Reionisation (EoR). A Kernel Density Estimator (KDE) is introduced for measuring the spatial temperature fluctuation power spectrum from the EoR. The KDE estimates the und
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d7a5e9b531f3353a1d94e792e467681
http://arxiv.org/abs/1904.11623
http://arxiv.org/abs/1904.11623
Autor:
Andrew Williams, M. Wilensky, L. Horsley, Christene Lynch, J. S. B. Wyithe, R. C. Joseph, Bryna J. Hazelton, Catherine A. Watkinson, D. L. Kaplan, Steven G. Murray, Suman Majumdar, Bartosz Pindor, Jonathan C. Pober, Kenji Hasegawa, Adam P. Beardsley, T. Booler, Rachel L. Webster, Shintaro Yoshiura, Daniel A. Mitchell, Keitaro Takahashi, Chen Wu, R. Byrne, Nichole Barry, Wenyang Li, Mark Walker, Kenji Kubota, Benjamin McKinley, Cathryn M. Trott, Brian Crosse, Miguel F. Morales, K. Steele, Christopher H. Jordan, D. Pallot, Steven Tingay, G. Sleap, Melanie Johnston-Hollitt, Q. Zheng, Randall B. Wayth, Thomas M. O. Franzen, T. Kaneuji, J. L. B. Line, Masoud Rahimi, David Emrich, J. Riding, D. Kenney
Publikováno v:
Publications of the Astronomical Society of Australia
We apply two methods to estimate the 21~cm bispectrum from data taken within the Epoch of Reionisation (EoR) project of the Murchison Widefield Array (MWA). Using data acquired with the Phase II compact array allows a direct bispectrum estimate to be
Autor:
D. L. Kaplan, Judd D. Bowman, Iver H. Cairns, Daniel C. Jacobs, B. W. Meyers, D. Pallot, Mengyao Xue, Joseph R. Callingham, Natasha Hurley-Walker, W. Li, James Miller-Jones, Shintaro Yoshiura, Keitaro Takahashi, Chen Wu, Adam P. Beardsley, Miroslav Filipovic, Thomas M. O. Franzen, W. W. Tian, Christene Lynch, R. C. Joseph, G. E. Anderson, C. J. Riseley, Steven Tingay, Nick Seymour, S. J. McSweeney, Colin J. Lonsdale, Melanie Johnston-Hollitt, L. Horsley, Chenoa D. Tremblay, Cathryn M. Trott, Bryan Gaensler, O. I. Wong, Patrick I. McCauley, N. D. R. Bhat, Miguel F. Morales, S. Kitaeff, Andrew Williams, Divya Oberoi, S. W. Duchesne, David Emrich, Randall B. Wayth, Steve Croft, Ivan S. Bojičić, Ray P. Norris, George Heald, Mark Walker, Denis Leahy, G. Gürkan, Tessa Vernstrom, Paul Hancock, John Morgan, Jai Verdhan Chauhan, H. Su, Brian Crosse, K. Steele, C. W. James, Jonathan C. Pober, D. Kenney, Marcin Sokolowski
The Murchison Widefield Array (MWA) is an open access telescope dedicated to studying the low frequency (80$-$300 MHz) southern sky. Since beginning operations in mid 2013, the MWA has opened a new observational window in the southern hemisphere enab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0e2cde05439adf2993c1ba5c73a3e1d
https://hdl.handle.net/1887/3201327
https://hdl.handle.net/1887/3201327
Autor:
Adam Lanman, J. L. B. Line, Cathryn M. Trott, Miguel F. Morales, Jonathan C. Pober, Christene Lynch, Bryna J. Hazelton, R. C. Joseph, R. Byrne, Judd D. Bowman, Daniel Jacobs, B. Pindor, Christopher H. Jordan, David L. Kaplan, A. P. Beardsley, D. Kenney, Tom Booler, Kenji Kubota, Melanie Johnston-Hollitt, S. S. Murray, Steven Tingay, T. M. O. Franzen, M. Wilensky, Andrew R. Williams, Chen Wu, Rachel L. Webster, S. Yoshiura, M. Walker, D. Pallot, Daniel A. Mitchell, G. Sleap, Qinghua Zheng, Keitaro Takahashi, David Emrich, L. Horsley, Kenji Hasegawa, Brian Crosse, K. Steele, J. Riding, B. McKinley, Ian Sullivan, Nichole Barry, Wenyang Li, R. B. Wayth, J. S. B. Wyithe, T. Kaneuji, M. Rahimi
Publikováno v:
The Astrophysical Journal. 887:141
The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and redundant interferometric calibration. The highly r