Study of redshifted H I from the epoch of reionization with drift scan
The detection of the Epoch of Reionization (EoR) in the redshifted 21-cm line is a challenging task. Here we formulate the detection of the EoR signal using the drift scan strategy. This method potentially has better instrumental stability as compared to the case where a single patch of sky is track...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Institute of Physics Publishing
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/9281 |
| _version_ | 1848745903835316224 |
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| author | Paul, S. Sethi, S. Subrahmanyan, R. Udaya Shankar, N. Dwarakanath, K. Deshpande, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Corey, B. Emrich, David Gaensler, B. Goeke, R. Greenhill, L. Hazelton, B. Hewitt, J. Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, Stephen Prabu, T. Rogers, A. Roshi, A. Srivani, K. Tingay, Steven Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. |
| author_facet | Paul, S. Sethi, S. Subrahmanyan, R. Udaya Shankar, N. Dwarakanath, K. Deshpande, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Corey, B. Emrich, David Gaensler, B. Goeke, R. Greenhill, L. Hazelton, B. Hewitt, J. Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, Stephen Prabu, T. Rogers, A. Roshi, A. Srivani, K. Tingay, Steven Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. |
| author_sort | Paul, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The detection of the Epoch of Reionization (EoR) in the redshifted 21-cm line is a challenging task. Here we formulate the detection of the EoR signal using the drift scan strategy. This method potentially has better instrumental stability as compared to the case where a single patch of sky is tracked. We demonstrate that the correlation time between measured visibilities could extend up to 1-2 hr for an interferometer array such as the Murchison Widefield Array (MWA), which has a wide primary beam. We estimate the EoR power based on cross-correlation of visibilities across time and show that the drift scan strategy is capable of the detection of the EoR signal with comparable/better signal-to-noise as compared to the tracking case. We also estimate the visibility correlation for a set of bright point sources and argue that the statistical inhomogeneity of bright point sources might allow their separation from the EoR signal. |
| first_indexed | 2025-11-14T06:24:45Z |
| format | Journal Article |
| id | curtin-20.500.11937-9281 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:24:45Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-92812019-02-19T05:35:29Z Study of redshifted H I from the epoch of reionization with drift scan Paul, S. Sethi, S. Subrahmanyan, R. Udaya Shankar, N. Dwarakanath, K. Deshpande, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Corey, B. Emrich, David Gaensler, B. Goeke, R. Greenhill, L. Hazelton, B. Hewitt, J. Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, Stephen Prabu, T. Rogers, A. Roshi, A. Srivani, K. Tingay, Steven Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. The detection of the Epoch of Reionization (EoR) in the redshifted 21-cm line is a challenging task. Here we formulate the detection of the EoR signal using the drift scan strategy. This method potentially has better instrumental stability as compared to the case where a single patch of sky is tracked. We demonstrate that the correlation time between measured visibilities could extend up to 1-2 hr for an interferometer array such as the Murchison Widefield Array (MWA), which has a wide primary beam. We estimate the EoR power based on cross-correlation of visibilities across time and show that the drift scan strategy is capable of the detection of the EoR signal with comparable/better signal-to-noise as compared to the tracking case. We also estimate the visibility correlation for a set of bright point sources and argue that the statistical inhomogeneity of bright point sources might allow their separation from the EoR signal. 2014 Journal Article http://hdl.handle.net/20.500.11937/9281 10.1088/0004-637X/793/1/28 Institute of Physics Publishing fulltext |
| spellingShingle | Paul, S. Sethi, S. Subrahmanyan, R. Udaya Shankar, N. Dwarakanath, K. Deshpande, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Corey, B. Emrich, David Gaensler, B. Goeke, R. Greenhill, L. Hazelton, B. Hewitt, J. Johnston-Hollitt, M. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, Stephen Prabu, T. Rogers, A. Roshi, A. Srivani, K. Tingay, Steven Wayth, Randall Webster, R. Whitney, A. Williams, Andrew Williams, C. Study of redshifted H I from the epoch of reionization with drift scan |
| title | Study of redshifted H I from the epoch of reionization with drift scan |
| title_full | Study of redshifted H I from the epoch of reionization with drift scan |
| title_fullStr | Study of redshifted H I from the epoch of reionization with drift scan |
| title_full_unstemmed | Study of redshifted H I from the epoch of reionization with drift scan |
| title_short | Study of redshifted H I from the epoch of reionization with drift scan |
| title_sort | study of redshifted h i from the epoch of reionization with drift scan |
| url | http://hdl.handle.net/20.500.11937/9281 |