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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.16967 |
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| _version_ | 1866911334266830848 |
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| author | Jeong, Oliver Delabrouille, Jacques Piat, Michel |
| author_facet | Jeong, Oliver Delabrouille, Jacques Piat, Michel |
| contents | Next-generation centimeter to sub-millimeter telescopes require exquisite control over instrumental far-sidelobe response to accurately measure faint signals like the Cosmic Microwave Background B modes. Because existing electromagnetic modeling methods are computationally expensive, we developed a novel, diffraction-based beam modeling method for rapid and low-cost calculations. We applied this methodology to model the BICEP3 far-sidelobes and found good qualitative agreement with in situ beam measurements. Using this validated simulated beam, we calculated the sidelobe temperature pickup for a specific observation scenario: scanning near the slopes of Cerro Toco in the Atacama Desert. This rapid, predictive framework is most valuable as a tool for optimizing instrument baffling and identifying efficient scan strategies during the conceptual design phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_16967 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fast far-sidelobe modeling for centimeter to sub-millimeter astrophysical observations Jeong, Oliver Delabrouille, Jacques Piat, Michel Instrumentation and Methods for Astrophysics Next-generation centimeter to sub-millimeter telescopes require exquisite control over instrumental far-sidelobe response to accurately measure faint signals like the Cosmic Microwave Background B modes. Because existing electromagnetic modeling methods are computationally expensive, we developed a novel, diffraction-based beam modeling method for rapid and low-cost calculations. We applied this methodology to model the BICEP3 far-sidelobes and found good qualitative agreement with in situ beam measurements. Using this validated simulated beam, we calculated the sidelobe temperature pickup for a specific observation scenario: scanning near the slopes of Cerro Toco in the Atacama Desert. This rapid, predictive framework is most valuable as a tool for optimizing instrument baffling and identifying efficient scan strategies during the conceptual design phase. |
| title | Fast far-sidelobe modeling for centimeter to sub-millimeter astrophysical observations |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2511.16967 |