The First Very Long Baseline Interferometric Seti Experiment
The first Search for Extra-Terrestrial Intelligence (SETI) conducted with very long baseline interferometry (VLBI) is presented. By consideration of the basic principles of interferometry, we show that VLBI is efficient at discriminating between SETI signals and human generated radio frequency inter...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Institute of Physics Publishing, Inc
2012
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/11955 |
| _version_ | 1848747943404765184 |
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| author | Rampadarath, Hayden Morgan, John Tingay, Steven Trott, Cathryn |
| author_facet | Rampadarath, Hayden Morgan, John Tingay, Steven Trott, Cathryn |
| author_sort | Rampadarath, Hayden |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The first Search for Extra-Terrestrial Intelligence (SETI) conducted with very long baseline interferometry (VLBI) is presented. By consideration of the basic principles of interferometry, we show that VLBI is efficient at discriminating between SETI signals and human generated radio frequency interference (RFI). The target for this study was the star Gliese 581, thought to have two planets within its habitable zone. On 2007 June 19, Gliese 581 was observed for 8 hr at 1230-1544 MHz with the Australian Long Baseline Array. The data set was searched for signals appearing on all interferometer baselines above five times the noise limit. A total of 222 potential SETI signals were detected and by using automated data analysis techniques were ruled out as originating from the Gliese 581 system. From our results we place an upper limit of 7 MW Hz–1 on the power output of any isotropic emitter located in the Gliese 581 system within this frequency range. This study shows that VLBI is ideal for targeted SETI including follow-up observations. The techniques presented are equally applicable to next-generation interferometers, such as the long baselines of the Square Kilometre Array. |
| first_indexed | 2025-11-14T06:57:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-11955 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:57:11Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing, Inc |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-119552017-09-13T15:54:08Z The First Very Long Baseline Interferometric Seti Experiment Rampadarath, Hayden Morgan, John Tingay, Steven Trott, Cathryn interferometric radio continuum stars techniques planetary systems individual (Gliese 581) The first Search for Extra-Terrestrial Intelligence (SETI) conducted with very long baseline interferometry (VLBI) is presented. By consideration of the basic principles of interferometry, we show that VLBI is efficient at discriminating between SETI signals and human generated radio frequency interference (RFI). The target for this study was the star Gliese 581, thought to have two planets within its habitable zone. On 2007 June 19, Gliese 581 was observed for 8 hr at 1230-1544 MHz with the Australian Long Baseline Array. The data set was searched for signals appearing on all interferometer baselines above five times the noise limit. A total of 222 potential SETI signals were detected and by using automated data analysis techniques were ruled out as originating from the Gliese 581 system. From our results we place an upper limit of 7 MW Hz–1 on the power output of any isotropic emitter located in the Gliese 581 system within this frequency range. This study shows that VLBI is ideal for targeted SETI including follow-up observations. The techniques presented are equally applicable to next-generation interferometers, such as the long baselines of the Square Kilometre Array. 2012 Journal Article http://hdl.handle.net/20.500.11937/11955 10.1088/0004-6256/144/2/38 Institute of Physics Publishing, Inc unknown |
| spellingShingle | interferometric radio continuum stars techniques planetary systems individual (Gliese 581) Rampadarath, Hayden Morgan, John Tingay, Steven Trott, Cathryn The First Very Long Baseline Interferometric Seti Experiment |
| title | The First Very Long Baseline Interferometric Seti Experiment |
| title_full | The First Very Long Baseline Interferometric Seti Experiment |
| title_fullStr | The First Very Long Baseline Interferometric Seti Experiment |
| title_full_unstemmed | The First Very Long Baseline Interferometric Seti Experiment |
| title_short | The First Very Long Baseline Interferometric Seti Experiment |
| title_sort | first very long baseline interferometric seti experiment |
| topic | interferometric radio continuum stars techniques planetary systems individual (Gliese 581) |
| url | http://hdl.handle.net/20.500.11937/11955 |