Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope
Copyright © Astronomical Society of Australia 2017 We present first results from pilot observations using a phased array feed (PAF) mounted on the Parkes 64-m radio telescope. The observations presented here cover a frequency range from 1 150 to 1 480 MHz and are used to show the ability of PAFs to...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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Cambridge University Press
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/58827 |
| _version_ | 1848760351326208000 |
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| author | Reynolds, T. Staveley-Smith, L. Rhee, J. Westmeier, T. Chippendale, A. Deng, X. Ekers, Ronald Kramer, M. |
| author_facet | Reynolds, T. Staveley-Smith, L. Rhee, J. Westmeier, T. Chippendale, A. Deng, X. Ekers, Ronald Kramer, M. |
| author_sort | Reynolds, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Copyright © Astronomical Society of Australia 2017 We present first results from pilot observations using a phased array feed (PAF) mounted on the Parkes 64-m radio telescope. The observations presented here cover a frequency range from 1 150 to 1 480 MHz and are used to show the ability of PAFs to suppress standing wave problems by a factor of ~10, which afflict normal feeds. We also compare our results with previous HIPASS observations and with previous H i images of the Large Magellanic Cloud. Drift scan observations of the GAMA G23 field resulted in direct H i detections at z = 0.0043 and z = 0.0055 of HIPASS galaxies J2242-30 and J2309-30. Our new measurements generally agree with archival data in spectral shape and flux density, with small differences being due to differing beam patterns. We also detect signal in the stacked H i data of 1 094 individually undetected galaxies in the GAMA G23 field in the redshift range 0.05 ? z ? 0.075. Finally, we use the low standing wave ripple and wide bandwidth of the PAF to set a 3s upper limit to any positronium recombination line emission from the Galactic Centre of < 0.09 K, corresponding to a recombination rate of < 3.0 × 10 45 s -1 . |
| first_indexed | 2025-11-14T10:14:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-58827 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:14:24Z |
| publishDate | 2017 |
| publisher | Cambridge University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-588272018-03-29T09:08:25Z Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope Reynolds, T. Staveley-Smith, L. Rhee, J. Westmeier, T. Chippendale, A. Deng, X. Ekers, Ronald Kramer, M. Copyright © Astronomical Society of Australia 2017 We present first results from pilot observations using a phased array feed (PAF) mounted on the Parkes 64-m radio telescope. The observations presented here cover a frequency range from 1 150 to 1 480 MHz and are used to show the ability of PAFs to suppress standing wave problems by a factor of ~10, which afflict normal feeds. We also compare our results with previous HIPASS observations and with previous H i images of the Large Magellanic Cloud. Drift scan observations of the GAMA G23 field resulted in direct H i detections at z = 0.0043 and z = 0.0055 of HIPASS galaxies J2242-30 and J2309-30. Our new measurements generally agree with archival data in spectral shape and flux density, with small differences being due to differing beam patterns. We also detect signal in the stacked H i data of 1 094 individually undetected galaxies in the GAMA G23 field in the redshift range 0.05 ? z ? 0.075. Finally, we use the low standing wave ripple and wide bandwidth of the PAF to set a 3s upper limit to any positronium recombination line emission from the Galactic Centre of < 0.09 K, corresponding to a recombination rate of < 3.0 × 10 45 s -1 . 2017 Journal Article http://hdl.handle.net/20.500.11937/58827 10.1017/pasa.2017.45 Cambridge University Press restricted |
| spellingShingle | Reynolds, T. Staveley-Smith, L. Rhee, J. Westmeier, T. Chippendale, A. Deng, X. Ekers, Ronald Kramer, M. Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope |
| title | Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope |
| title_full | Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope |
| title_fullStr | Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope |
| title_full_unstemmed | Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope |
| title_short | Spectral-Line Observations Using a Phased Array Feed on the Parkes Telescope |
| title_sort | spectral-line observations using a phased array feed on the parkes telescope |
| url | http://hdl.handle.net/20.500.11937/58827 |