Difference between revisions of "Specially processed maps"
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Revision as of 18:39, 26 February 2013
NOTE: Text in red to be removed when filling the contents
Contents
Product description[edit]
A general description of the product, including e.g. figures related to the contents (e.g. maps, tables), and some explanation of its scientific meaning. If there are scientific warnings about the use of the product (User’s caveats), they should also be given here, or at least references to other explanatory documents (papers etc).
Lensing map[edit]
The fiducial Planck lensing potential map is made from a minimum variance combination of the 143 and 217GHz Planck maps on approximately 70% of the sky, using 857GHz as a dust template. This is the same lens reconstruction on which the Planck lensing likelihood is based. It is distributed in FITS format. The headers of this file are copied at the bottom of this page.
We distribute:
- PHIBAR
- A (transfer-function convolved) map of the lensing potential, in NSIDE 2048 HEALPix RING format. It is obtained by convolving the lensing potential estimate \hat{\phi} with the lensing response function $R_L^{\phi\phi}$. The construction of these quantities are described in detail in Sec. 2.1 of $\fixme{P12_Lensing}$. This map has been band-limited between multipoles $10 \le L \le 2048$. The response function $R_L^{\phi\phi}$ here is analogous to the the beam transfer function in a CMB temperature or polarization map. We have chosen to distribute this transfer-function convolved map rather than the normalized lens reconstruction as it is a significantly more localized function of the CMB temperature map from which it is derived. This is discussed further in Appendix A of P12_Lensing.
- MASK
- This is a NSIDE 2048 HEALPix RING format map, containing the analysis mask used in the lens reconstruction.
- RLPP
- This column contains the response function $R_L^{\phi\phi}$.
- NLPP
- This column contains a sky-averaged estimate of the noise power spectrum of PHIBAR. The noise is highly coloured. Note that there is some dependence of the noise power spectrum with the local noise level of the map. Note that the noise power spectrum estimate here is not sufficiently accurate for a power spectrum analysis.
[From Duncan Hanson, Feb.2013]
Production process[edit]
Description of the Pipeline used to generate the product. In particular any limitations and approximations used in the data processing should be listed. Avoiding detailed descriptions of methods and referring to other parts of the ES and/or the relevant Planck papers for the details. References however should be quite detailed (i.e. it is not enough to direct the user to a paper, but the relevant section in the paper should be provided).
Inputs[edit]
A list (and brief description to the extent possible) of the input data used to generate this product (down to file names), as well as any external ancillary data sets which were used.
Related products[edit]
A description of other products that are related and share some commonalities with the product being described here. E.g. if the description is of a generic product (e.g. frequency maps), all the products falling into that type should be listed and referenced.
Format[edit]
A detailed description of the data format of each file, including header keywords for fits files, extension names, column names, formats….
File names[edit]
Extensions[edit]
Keywords[edit]
The file structure is given below
XTENSION= 'BINTABLE' /Written by IDL: Thu Feb 7 11:29:13 2013 BITPIX = 8 / NAXIS = 2 /Binary table NAXIS1 = 251658240 /Number of bytes per row NAXIS2 = 1 /Number of rows PCOUNT = 0 /Random parameter count GCOUNT = 1 /Group count TFIELDS = 2 /Number of columns COMMENT COMMENT *** End of mandatory fields *** COMMENT EXTVER = 1 /Extension version DATE = '2013-02-07' /Creation date COMMENT COMMENT *** Column names *** COMMENT TTYPE1 = 'WFMAP ' / W-F Lensing map TTYPE3 = 'Mask ' / Mask TTYPE2 = 'MASK ' / COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = '50331648E' / TFORM2 = '50331648B' / COMMENT COMMENT *** Column units *** COMMENT TUNIT1 = 'none ' / TUNIT2 = 'none ' / EXTNAME = 'LENS-MAP' / Extension name COORSYS = 'GALACTIC' / Coordinate system ORDERING= 'NESTED ' / Healpix ordering NSIDE = 2048 / Healpix Nside FIRSTPIX= 0 / LASTPIX = 50331647 / FILENAME= 'COM_Lensing_R1.00.fits' / FITS filename CHECKSUM= 'D4iYD4fWD4fWD4fW' / HDU checksum created 2013-02-07T10:29:14 BAD_DATA= -1.63750E+30 / bad pixel value PROCVER = 'DX9 ' / Product version COMMENT COMMENT ------------------------------------------------------------------------ COMMENT Lensing products: COMMENT - wfmap (Wiener-filtered phi): map of the C_L^{\phi\phi} \bar{\phi}_{LM} COMMENT - mask: map of the reconstruction mask COMMENT ------------------------------------------------------------------------ COMMENT HFI-DMC objects: creation date and group/name COMMENT M3 dir: /space/dhanson/share/lensrec_v08_pub/ COMMENT ... dx9nom_143_217_857m_g30_simnfg_simbeam_simlens/wfmap/ COMMENT map: wfmap.fits COMMENT mask: mask.fits.gz COMMENT ------------------------------------------------------------------------ END XTENSION= 'BINTABLE' /Written by IDL: Thu Feb 7 11:29:17 2013 BITPIX = 8 / NAXIS = 2 /Binary table NAXIS1 = 8188 /Number of bytes per row NAXIS2 = 1 /Number of rows PCOUNT = 0 /Random parameter count GCOUNT = 1 /Group count TFIELDS = 1 /Number of columns COMMENT COMMENT *** End of mandatory fields *** COMMENT EXTVER = 1 /Extension version DATE = '2013-02-07' /Creation date COMMENT COMMENT *** Column names *** COMMENT TTYPE1 = 'TLPP ' / Transfer function TUNIT1 = 'NONE ' / COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = '2047E ' / COMMENT COMMENT *** Planck params *** COMMENT EXTNAME = 'TransFun' /Transfer Function L_MIN = 2 /ell min L_MAX = 2048 /ell max FILENAME= 'COM_Lensing_R1.00.fits' / FITS filename CHECKSUM= 'aiAgci7ZaiAfai5Z' / HDU checksum created 2013-02-07T10:29:17 PROCVER = 'DX9 ' / Product version COMMENT COMMENT ------------------------------------------------------------------------ COMMENT Lensing products: COMMENT - TLPP: Transfer function T_l between \phi_{LM} and the map COMMENT ------------------------------------------------------------------------ COMMENT HFI-DMC objects: creation date and group/name COMMENT M3 dir: /space/dhanson/share/lensrec_v08_pub/ COMMENT ... dx9nom_143_217_857m_g30_simnfg_simbeam_simlens/wfmap/ COMMENT tlpp: tlpp.dat COMMENT ------------------------------------------------------------------------ END
Numerical Format[edit]
Flexible Image Transfer Specification
(Hierarchical Equal Area isoLatitude Pixelation of a sphere, <ref name="Template:Gorski2005">HEALPix: A Framework for High-Resolution Discretization and Fast Analysis of Data Distributed on the Sphere, K. M. Górski, E. Hivon, A. J. Banday, B. D. Wandelt, F. K. Hansen, M. Reinecke, M. Bartelmann, ApJ, 622, 759-771, (2005).
Cosmic Microwave background
(Planck) High Frequency Instrument
Data Management Component, the databases used at the HFI and LFI DPCs
