Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope
We describe the parameters of a low-frequency all-sky survey of compact radio sources using Interplanetary Scintillation, undertaken with the Murchison Widefield Array. While this survey gives important complementary information to low-resolution survey, providing information on the sub-arsecond str...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Cambridge University Press
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/74250 |
| _version_ | 1848763220560445440 |
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| author | Morgan, John Macquart, Jean-Pierre Chhetri, Rajan Ekers, Ronald Tingay, Steven Sadler, E. |
| author_facet | Morgan, John Macquart, Jean-Pierre Chhetri, Rajan Ekers, Ronald Tingay, Steven Sadler, E. |
| author_sort | Morgan, John |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We describe the parameters of a low-frequency all-sky survey of compact radio sources using Interplanetary Scintillation, undertaken with the Murchison Widefield Array. While this survey gives important complementary information to low-resolution survey, providing information on the sub-arsecond structure of every source, a survey of this kind has not been attempted in the era of low-frequency imaging arrays such as the Murchison Widefield Array and LOw Frequency Array. Here we set out the capabilities of such a survey, describing the limitations imposed by the heliocentric observing geometry and by the instrument itself. We demonstrate the potential for Interplanetary Scintillation measurements at any point on the celestial sphere and we show that at 160 MHz, reasonable results can be obtained within 30° of the ecliptic (2 str: half the sky). We also suggest some observational strategies and describe the first such survey, the Murchison Widefield Array Phase I Interplanetary Scintillation survey. Finally we analyse the potential of the recently upgraded Murchison Widefield Array and discuss the potential of the Square Kilometre Array-low to use Interplanetary Scintillation to probe sub-mJy flux density levels at sub-arcsecond angular resolution. |
| first_indexed | 2025-11-14T11:00:00Z |
| format | Journal Article |
| id | curtin-20.500.11937-74250 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:00:00Z |
| publishDate | 2019 |
| publisher | Cambridge University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-742502019-09-02T08:23:16Z Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope Morgan, John Macquart, Jean-Pierre Chhetri, Rajan Ekers, Ronald Tingay, Steven Sadler, E. We describe the parameters of a low-frequency all-sky survey of compact radio sources using Interplanetary Scintillation, undertaken with the Murchison Widefield Array. While this survey gives important complementary information to low-resolution survey, providing information on the sub-arsecond structure of every source, a survey of this kind has not been attempted in the era of low-frequency imaging arrays such as the Murchison Widefield Array and LOw Frequency Array. Here we set out the capabilities of such a survey, describing the limitations imposed by the heliocentric observing geometry and by the instrument itself. We demonstrate the potential for Interplanetary Scintillation measurements at any point on the celestial sphere and we show that at 160 MHz, reasonable results can be obtained within 30° of the ecliptic (2 str: half the sky). We also suggest some observational strategies and describe the first such survey, the Murchison Widefield Array Phase I Interplanetary Scintillation survey. Finally we analyse the potential of the recently upgraded Murchison Widefield Array and discuss the potential of the Square Kilometre Array-low to use Interplanetary Scintillation to probe sub-mJy flux density levels at sub-arcsecond angular resolution. 2019 Journal Article http://hdl.handle.net/20.500.11937/74250 10.1017/pasa.2018.40 Cambridge University Press restricted |
| spellingShingle | Morgan, John Macquart, Jean-Pierre Chhetri, Rajan Ekers, Ronald Tingay, Steven Sadler, E. Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope |
| title | Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope |
| title_full | Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope |
| title_fullStr | Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope |
| title_full_unstemmed | Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope |
| title_short | Interplanetary Scintillation with the Murchison Widefield Array V: An all-sky survey of compact sources using a modern low-frequency radio telescope |
| title_sort | interplanetary scintillation with the murchison widefield array v: an all-sky survey of compact sources using a modern low-frequency radio telescope |
| url | http://hdl.handle.net/20.500.11937/74250 |