Skip to content
DraconiticResearch
Search Sources API
203,234 studies31 sourcesUpdated 51 min ago
PreprintCC BY 4.0arXiv

Map-based asymmetric beam treatment: application of real-space beam patterns in CMB data analysis

  • Artem Basyrov
Open at sourcePDFDOICite

Abstract

Real telescope beams are asymmetric, breaking the simple Bℓ factorisation in harmonic space and coupling modes across ℓ and m. We develop a map-domain treatment in which beam convolution is a local, scan-dependent operation applied directly to the time-ordered data (TOD), accommodating the full beam shape and giving a direct handle on intensity-to-polarisation (I → P) leakage. A noiseless validation against spherical-harmonic convolution reproduces the input temperature and B-mode power spectra up to ℓ ≃ 1000, well beyond the range of primordial B-mode science. We outline how the operation maps onto a sparse linear BeamOperator for modular map-making.

Related

  1. Beam-driven Evaporation in 2.5D Flare Simulations with an Asymmetric Magnetic Field Configuration
    M. Dubart, M. Druett, W. Ruan +1
    The Astrophysical JournalPeer-reviewedCC BY 4.0Full textSolar & stellar physicsCrossref
  2. Exact map-space beam convolution via spin-mapmaking
    Camille Demay, Magdy Morshed, Martina Gerbino +1
    arXivPreprintarXiv licenceFull textCosmologyGeneral physicsarXivHAL
  3. RAMSES-MCR: A consistent multi-group treatment of cosmic rays physics in momentum-space with the RAMSES code
    Nimatou-Seydi Diallo, Yohan Dubois, Alexandre Marcowith +2
    HALPreprintCC BY 4.0Full textCosmologyGeneral earth scienceHAL
  4. Analysis of wave processes using beam-driven Langmuir/Z-mode waveforms generated in particle-in-cell simulations
    F J Polanco-Rodríguez, C. Krafft, P. Savoini
    Astronomy & Astrophysics - A&APeer-reviewedCC BY 4.0Full text1 citedSolar & stellar physicsHAL
  5. Asymmetric Reheating of a Dark Sector
    Catarina Cosme, João G. Rosa, Inês Sequeira
    arXivPreprintarXiv licenceFull textCosmologyHigh-energy & particle physicsarXiv

Cite

BibTeXRIS
BibTeX
@misc{basyrov2026mapbased,
  title = {{Map-based asymmetric beam treatment: application of real-space beam patterns in CMB data analysis}},
  author = {Artem Basyrov},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.03840},
  eprint = {2610.03840},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.03840},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Map-based asymmetric beam treatment: application of real-space beam patterns in CMB data analysis
AU  - Artem Basyrov
PY  - 2026
DA  - 2026/10/02
PB  - arXiv
DO  - 10.48550/arxiv.2610.03840
UR  - https://arxiv.org/abs/2610.03840
AB  - Real telescope beams are asymmetric, breaking the simple B_ℓ factorisation in harmonic space and coupling modes across ℓ and m. We develop a map-domain treatment in which beam convolution is a local, scan-dependent operation applied directly to the time-ordered data (TOD), accommodating the full beam shape and giving a direct handle on intensity-to-polarisation (I → P) leakage. A noiseless validation against spherical-harmonic convolution reproduces the input temperature and B-mode power spectra up to ℓ ≃ 1000, well beyond the range of primordial B-mode science. We outline how the operation maps onto a sparse linear BeamOperator for modular map-making.
ER  -