Print Email Facebook Twitter Pointing Calibration of GroundBIRD Telescope Using Moon Observation Data Title Pointing Calibration of GroundBIRD Telescope Using Moon Observation Data Author Sueno, Y. (Graduate School of Science) Baselmans, J.J.A. (TU Delft Tera-Hertz Sensing; SRON Netherlands Institute for Space Research) Coppens, A. (SRON Netherlands Institute for Space Research) Génova-Santos, R. T. (Instituto de Astrofísica de Canarias; Universidad de la Laguna) Hattori, M. (Tohoku University) Karatsu, K. (SRON Netherlands Institute for Space Research) Lee, K. (Korea University; Student TU Delft) Suzuki, J. (Graduate School of Science) Thoen, David (SRON Netherlands Institute for Space Research) Date 2024 Abstract Understanding telescope pointing (i.e. line of sight) is important for observing the cosmic microwave background (CMB) and astronomical objects. The Moon is a candidate astronomical source for pointing calibration. Although the visible size of the Moon (30`) is larger than that of the planets, we can frequently observe the Moon once a month with a high signal-to-noise ratio. We developed a method for performing pointing calibration using observational data from the Moon. We considered the tilts of the telescope axes as well as the encoder and collimation offsets for pointing calibration. In addition, we evaluated the effects of the nonuniformity of the brightness temperature of the Moon, which is a dominant systematic error. As a result, we successfully achieved a pointing accuracy of 3.3`. This is one order of magnitude smaller than an angular resolution of 36`. This level of accuracy competes with past achievements in other ground-based CMB experiments using observational data from the planets. To reference this document use: http://resolver.tudelft.nl/uuid:6ef66de3-b3b1-4f9f-bed0-14301f753645 DOI https://doi.org/10.1093/ptep/ptae011 Source Progress of Theoretical and Experimental Physics, 2024 (2) Part of collection Institutional Repository Document type journal article Rights © 2024 Y. Sueno, J.J.A. Baselmans, A. Coppens, R. T. Génova-Santos, M. Hattori, K. Karatsu, K. Lee, J. Suzuki, David Thoen, More Authors Files PDF ptae011.pdf 3.2 MB Close viewer /islandora/object/uuid:6ef66de3-b3b1-4f9f-bed0-14301f753645/datastream/OBJ/view