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The Planck-LFI budget of systematic effects uncertainties

Learn about the comprehensive budget of systematic effects and uncertainties in the Planck-LFI mission, including their assessment through null tests and simulations. This budget supports the first release of cosmological results.

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The Planck-LFI budget of systematic effects uncertainties

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  1. The Planck-LFI budget of systematic effects uncertainties M. Bersanelli / A. Mennella Università degli Studi di Milano – Dipartimento di Fisica

  2. A constant thought Systematic effects have been central in all LFI activities since its design Hardware designed for systematic effect rejection Constant effort in data analysis to assess quantitatively residual uncertainties of all known effects Detailed budget is available supporting first release of cosmological results

  3. Systematic effects

  4. Systematic effects budgetMap level

  5. Systematic effects budgetPower spectrum

  6. How we assess them Null tests: highlight effects above noise level Simulations: assess effects even below noise level Ideally the two approaches should yield the same answer

  7. Null tests Half ring differences to check for short timescale effects Results consistent with expected noise performace Survey differences to check for large angular scale effects Residual of S1-S2 difference trace sidelobe residuals

  8. 30 GHz 44 GHz 70 GHz

  9. Simulations • Based on flight data and instrument information (models and ground measurements) • Allow assessment at map and power spectrum level • Residual of S1-S2 difference trace sidelobe residuals

  10. Example 1 – thermal effects

  11. Example 2 – …

  12. Example 3 – …

  13. Conclusions

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