Planck 2015 results. VIII. High Frequency Instrument data processing: Calibration and maps
Abstract
This paper describes the processing applied to the cleaned, time-ordered information obtained from the Planck High Frequency Instrument (HFI) with the aim of producing photometrically calibrated maps in temperature and (for the first time) in polarization. The data from the entire 2.5-year HFI mission include almost five full-sky surveys. HFI observes the sky over a broad range of frequencies, from 100 to 857 GHz. To obtain the best accuracy on the calibration over such a large range, two different photometric calibration schemes have been used. The 545 and 857 GHz data are calibrated using models of planetary atmospheric emission. The lower frequencies (from 100 to 353 GHz) are calibrated using the time-variable cosmological microwave background dipole, which we call the orbital dipole. This source of calibration only depends on the satellite velocity with respect to the solar system. Using a CMB temperature of T_(CMB) = 2.7255 ± 0.0006 K, it permits an independent measurement of the amplitude of the CMB solar dipole (3364.3 ± 1.5 μK), which is approximatively 1σ higher than the WMAP measurement with a direction that is consistent between the two experiments. We describe the pipeline used to produce the maps ofintensity and linear polarization from the HFI timelines, and the scheme used to set the zero level of the maps a posteriori. We also summarize the noise characteristics of the HFI maps in the 2015 Planck data release and present some null tests to assess their quality. Finally, we discuss the major systematic effects and in particular the leakage induced by flux mismatch between the detectors that leads to spurious polarization signal.
Additional Information
© 2016 ESO. Received: 5 February 2015; Accepted: 10 September 2015; Published online 20 September 2016. The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MINECO, JA, and RES (Spain); Tekes, AoF, and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); ERC and PRACE (EU). A description of the Planck Collaboration and a list of its members, indicating which technical or scientific activities they have been involved in, can be found at http://www.cosmos.esa.int/web/planck/planck-collaboration
Attached Files
Submitted - 1502.01587.pdf
Published - aa25820-15.pdf
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Additional details
- Eprint ID
- 74520
- DOI
- 10.1051/0004-6361/201525820
- Resolver ID
- CaltechAUTHORS:20170224-082939025
- arXiv
- arXiv:1502.01587
- European Space Agency (ESA)
- Centre National d'Études Spatiales (CNES)
- Centre National de la Recherche Scientifique (CNRS)
- Institut National des Sciences de l'Univers (INSU)
- Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
- Institut National du Patrimoine (INP)
- Agenzia Spaziale Italiana (ASI)
- Consiglio Nazionale delle Ricerche (CNR)
- Istituto Nazionale di Astrofisica (INAF)
- NASA
- Department of Energy (DOE)
- Science and Technology Facilities Council (STFC)
- United Kingdom Space Agency (UKSA)
- Consejo Superior de Investigaciones Científicas (CSIC)
- Ministerio de Economía, Industria y Competitividad (MINECO)
- Junta de Andalucía
- RES (Spain)
- Finnish Funding Agency for Technology and Innovation (Tekes)
- Academy of Finland
- Finnish IT Center for Science (CSC)
- Deutschen Zentrums für Luft- und Raumfahrt (DLR)
- Max-Planck-Gesellschaft
- Canadian Space Agency (CSA)
- DTU Space (Denmark)
- State Secretariat for Education, Research and Innovation (SER)
- Swiss Space Office (SSO)
- Research Council of Norway
- Science Foundation, Ireland
- Fundação para a Ciência e a Tecnologia (FCT)
- Ministério da Ciência, Tecnologia e Ensino Superior (MCTES)
- European Research Council (ERC)
- PRACE (EU)
- Created
-
2017-02-24Created from EPrint's datestamp field
- Updated
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2023-03-15Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC), COSMOS