Linear map-making with LuSEE-Night

LuSEE-Night is a pathfinder radio telescope on the lunar far side employing four 3-m monopole antennas arranged as two horizontal cross pseudo-dipoles on a rotational stage and sensitive to the radio sky in the 1-50 MHz frequency band. LuSEE-Night measures the corresponding 16 correlation products as a function of frequency. While each antenna combination measures radiation coming from a large area of the sky, their aggregate information as a function of phase in the lunar cycle and rotational stage position can be deconvolved into a low-resolution map of the sky. We study this deconvolution using linear map-making based on the Wiener filter algorithm. We illustrate how systematic effects can be effectively marginalised over as contributions to the noise covariance and demonstrate this technique on beam knowledge uncertainty and gain fluctuations. With reasonable assumptions about instrument performance, we show that LuSEE-Night should be able to map the sub-50 MHz sky at a ~5-degree resolution.

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Publication Details

Journal
ArXiv.org
Published
2025-08-22
Primary Topic
Geographic Information Systems Studies
Type
article
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article

Linear map-making with LuSEE-Night

Christian H. Bye, H. Camacho, Joshua J. Hibbard, Anže Slosar et al.
ArXiv.org
Geographic Information Systems Studies
article

Linear map-making with LuSEE-Night

Christian H. Bye, H. Camacho, Joshua J. Hibbard, Anže Slosar, H. K. Vedantham, M. Klein‐Wolt, Jack Burns, M. Maksimović, M. Pulupa, Joel Krajewski, Aritoki Suzuki, B. R. Saliwanchik, M. Piat, David Rapetti, Dudley Barker, D. Sundkvist, Zack Li, Stuart D. Bale, K. M. Rotermund, K. Goetz, Rugved Pund, Corentin Louis, Johnny Dorigo Jones, Ryan McLean, L. V. E. Koopmans, Raúl A. Monsalve, Paul O’Connor, Philippe Zarka, Sven Herrmann, Oliver Jeong, Aaron Parsons, Adam Fahs, Fatima Yousuf, Graham Speedie, Nikolai Stefanov
article en

Abstract

LuSEE-Night is a pathfinder radio telescope on the lunar far side employing four 3-m monopole antennas arranged as two horizontal cross pseudo-dipoles on a rotational stage and sensitive to the radio sky in the 1-50 MHz frequency band. LuSEE-Night measures the corresponding 16 correlation products as a function of frequency. While each antenna combination measures radiation coming from a large area of the sky, their aggregate information as a function of phase in the lunar cycle and rotational stage position can be deconvolved into a low-resolution map of the sky. We study this deconvolution using linear map-making based on the Wiener filter algorithm. We illustrate how systematic effects can be effectively marginalised over as contributions to the noise covariance and demonstrate this technique on beam knowledge uncertainty and gain fluctuations. With reasonable assumptions about instrument performance, we show that LuSEE-Night should be able to map the sub-50 MHz sky at a ~5-degree resolution.

ArXiv.org
Université Paris Cité (FR), Laboratoire AstroParticule et Cosmologie (FR), Laboratoire d’études spatiales et d’instrumentation en astrophysique (FR), LIRA - Laboratoire d'instrumentation et de recherche en astrophysique (FR)
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Geographic Information Systems Studies
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