Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438
We describe a data reduction pipeline for very long baseline interferometry astrometric observations of pulsars, implemented using the ParselTongue AIPS interface. The pipeline performs calibration (including ionosphere modeling), phase referencing with proper accounting for the reference source str...
| Main Authors: | , , |
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| Format: | Journal Article |
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The American Astronomical Society
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/34860 |
| _version_ | 1848754338018623488 |
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| author | Deller, A. Tingay, Steven Brisken, W. |
| author_facet | Deller, A. Tingay, Steven Brisken, W. |
| author_sort | Deller, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We describe a data reduction pipeline for very long baseline interferometry astrometric observations of pulsars, implemented using the ParselTongue AIPS interface. The pipeline performs calibration (including ionosphere modeling), phase referencing with proper accounting for the reference source structure, amplitude corrections for pulsar scintillation, and position fitting to yield the position, proper motion, and parallax. The optimal data weighting scheme to minimize the total error budget of a parallax fit, and how this scheme varies with pulsar parameters such as flux density, is also investigated. The robustness of the techniques employed is demonstrated with the presentation of the first results from a two-year astrometry program using the Australian Long Baseline Array. The parallax of PSR J1559-4438 is determined to be p = 0.384 0.081 mas (1s), resulting in a distance estimate of 2600 pc that is consistent with earlier dispersion measure and HI absorption stimates. |
| first_indexed | 2025-11-14T08:38:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-34860 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:38:49Z |
| publishDate | 2009 |
| publisher | The American Astronomical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-348602023-02-22T06:24:24Z Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 Deller, A. Tingay, Steven Brisken, W. interferometric astrometry pulsars general pulsars individual (J1559-4438) techniques We describe a data reduction pipeline for very long baseline interferometry astrometric observations of pulsars, implemented using the ParselTongue AIPS interface. The pipeline performs calibration (including ionosphere modeling), phase referencing with proper accounting for the reference source structure, amplitude corrections for pulsar scintillation, and position fitting to yield the position, proper motion, and parallax. The optimal data weighting scheme to minimize the total error budget of a parallax fit, and how this scheme varies with pulsar parameters such as flux density, is also investigated. The robustness of the techniques employed is demonstrated with the presentation of the first results from a two-year astrometry program using the Australian Long Baseline Array. The parallax of PSR J1559-4438 is determined to be p = 0.384 0.081 mas (1s), resulting in a distance estimate of 2600 pc that is consistent with earlier dispersion measure and HI absorption stimates. 2009 Journal Article http://hdl.handle.net/20.500.11937/34860 10.1088/0004-637X/690/1/198 The American Astronomical Society unknown |
| spellingShingle | interferometric astrometry pulsars general pulsars individual (J1559-4438) techniques Deller, A. Tingay, Steven Brisken, W. Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 |
| title | Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 |
| title_full | Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 |
| title_fullStr | Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 |
| title_full_unstemmed | Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 |
| title_short | Precision Southern Hemisphere Pulsar VLBI Astrometry: Techniques and Results for PSR J1559-4438 |
| title_sort | precision southern hemisphere pulsar vlbi astrometry: techniques and results for psr j1559-4438 |
| topic | interferometric astrometry pulsars general pulsars individual (J1559-4438) techniques |
| url | http://hdl.handle.net/20.500.11937/34860 |