L-BASS: A project to produce an absolutely calibrated 1.4 GHz sky map. II -- Technical Description of the System
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866911025552424960 |
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| author | Zerafa, D. P. Wilkinson, P. N. Radcliffe, C. J. Leahy, J. P. Browne, I. W. A. Black, P. J. |
| author_facet | Zerafa, D. P. Wilkinson, P. N. Radcliffe, C. J. Leahy, J. P. Browne, I. W. A. Black, P. J. |
| contents | L-BASS is an instrument designed to make radiometric temperature measurements of the sky with an absolute accuracy of better than 0.1 K at 1.4 GHz. This will be achieved in two steps: first by measuring the sky temperature relative to that of the North Celestial Pole, using two horn-based antennas, and second with the sky antenna replaced with a calibrated cryogenic load to measure the absolute brightness temperature of the North Celesial Pole. Here we describe the design of the L-BASS two-antenna system and report on laboratory measurements to establish its performance at component and sub-system level. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03900 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | L-BASS: A project to produce an absolutely calibrated 1.4 GHz sky map. II -- Technical Description of the System Zerafa, D. P. Wilkinson, P. N. Radcliffe, C. J. Leahy, J. P. Browne, I. W. A. Black, P. J. Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics L-BASS is an instrument designed to make radiometric temperature measurements of the sky with an absolute accuracy of better than 0.1 K at 1.4 GHz. This will be achieved in two steps: first by measuring the sky temperature relative to that of the North Celestial Pole, using two horn-based antennas, and second with the sky antenna replaced with a calibrated cryogenic load to measure the absolute brightness temperature of the North Celesial Pole. Here we describe the design of the L-BASS two-antenna system and report on laboratory measurements to establish its performance at component and sub-system level. |
| title | L-BASS: A project to produce an absolutely calibrated 1.4 GHz sky map. II -- Technical Description of the System |
| topic | Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2506.03900 |