Difference between revisions of "Specially processed maps"

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{{DISPLAYTITLE:Additional maps}}
 
==Overview==
 
==Overview==
  
<span style="color:Red">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).</span>
+
This section describes products that require special processing. Only one such product is available at this time; this section will be expanded with time as more products are added.
 
+
  
 
== Lensing map ==
 
== Lensing map ==
 
 
=== Description ===
 
=== Description ===
  
The fiducial Planck lensing potential map is made from a minimum variance combination of the 143 and 217 GHz 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.  
+
Here we present the minimum-variance (MV) lens reconstruction which forms the basis for the main results of {{PlanckPapers|planck2013-p12}}. This map is produced using a combination of the 143 and 217 GHz Planck maps on approximately 70% of the sky, and is the same map on which the Planck lensing likelihood is based.
  
 
We distribute:
 
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 $R_L^{\phi\phi}$.  
+
; 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 <math>\hat{\phi}</math> with the lensing response function <math>R_L^{\phi\phi}</math>. This map has been band-limited between multipoles <math>10 \le L \le 2048</math>.
; MASK : This is a NSIDE 2048 HEALPix map, containing the analysis mask used in the lens reconstruction.
+
; MASK : This is a NSIDE = 2048 HEALPix map, containing the analysis mask used in the lens reconstruction. ''Note'': the lensing map PHIBAR may take small but non-zero values inside the masked regions because it has been bandlimited.
; RLPP : This column contains the response function $R_L^{\phi\phi}$.
+
; RLPP : This column contains the response function <math>R_L^{\phi\phi}</math>.
; 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.
+
; NLPP : This column contains a sky-averaged estimate of the noise power spectrum of PHIBAR, <math>N_L^{\phi\phi}</math>. The noise is highly coloured. There is a dependence of the noise power spectrum on the local noise level of the map, discussed in Appendix A of {{PlanckPapers|planck2013-p12}}. Note that the noise power spectrum estimate here is not sufficiently accurate for a power spectrum analysis.
 +
 
 +
Also, the table below gives the lensing curl-mode power spectrum data used to produce Figure A2 of {{PlanckPapers|planck2013-p12}}:
 +
 
 +
{| border="1" cellpadding="3" cellspacing="0" align="center" style="text-align:center"
 +
|+ ''''MV' curl reconstruction bandpowers from Fig A2 of {{PlanckPapers|planck2013-p12}} '''
 +
|-  bgcolor="ffdead" 
 +
! <math>L</math><sub>min</sub> ||  <math>L</math><sub>max</sub> ||  <math>{\hat{C}_L}^{\psi\psi} (L(L+1))^2/(2\pi)</math> || <math> std({\hat{C}_L}^{\psi\psi})  (L(L+1))^2 /(2\pi)</math>
 +
|-
 +
|    2 ||    7 || -13.6379  || 15.3409
 +
|-
 +
|    8 ||  20 ||  6.0184  ||  4.8881
 +
|-
 +
|    21 ||  39 ||  -1.0675  ||  3.0940
 +
|-
 +
|    40 ||  65 ||  0.6135  ||  1.8474
 +
|-
 +
|    66 ||  100 ||  1.5030  ||  1.2696
 +
|-
 +
|  101 ||  144 ||  1.3760  ||  0.9950
 +
|-
 +
|  145 ||  198 ||  -1.2289  ||  0.8286
 +
|-
 +
|  199 ||  263 ||  1.1910  ||  0.7001
 +
|-
 +
|  264 ||  338 ||  -0.6567  ||  0.6197
 +
|-
 +
|  339 ||  425 ||  -0.8201  ||  0.5235
 +
|-
 +
|  426 ||  525 ||  -0.7581  ||  0.4850
 +
|-
 +
|  526 ||  637 ||  -0.3201  ||  0.5134
 +
|-
 +
|  638 ||  762 ||  -0.1589  ||  0.4073
 +
|-
 +
|  763 ||  901 ||  -0.6451  ||  0.4044
 +
|-
 +
|  902 || 1054 ||  0.4910  ||  0.3718
 +
|-
 +
|  1055 || 1221 ||  -0.2186  ||  0.3702
 +
|-
 +
|  1222 || 1404 ||  -0.3295  ||  0.4146
 +
|-
 +
|  1405 || 1602 ||  -0.3647  ||  0.4703
 +
|-
 +
|  1603 || 1816 ||  -0.1060  ||  0.5904
 +
|-
 +
|  1817 || 2020 ||  -0.7887  ||  0.8507
 +
|}
  
''[From Duncan Hanson, Feb.2013]''
 
  
 
=== Production process ===
 
=== Production process ===
  
The construction of these quantities are described in detail in Sec. 2.1 of <span style="color:red">P12_Lensing</span>. 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 <span style="color:red">P12_Lensing</span>.  
+
The construction PHIBAR, RLPP and NLPP are described in detail in Sec. 2.1 of {{PlanckPapers|planck2013-p12}}. The response function <math>R_L^{\phi\phi}</math> 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, and therefore more useful for cross-correlation studies.
  
 
===Inputs===
 
===Inputs===
  
This product is built from the 143 and 217 GHz Planck sky maps.
+
This product is built from the 143 and 217 GHz Planck [[Frequency Maps|frequency maps]], with 857GHz projected out as a dust template.
 +
The analysis mask is constructed from a combination of thresholding in the 857GHz map (to remove the regions which are most contaminated by Galactic dust) and the [[CMB_and_astrophysical_component_maps#CO_emission_maps | Type2 CO map]] (to reduce contamination from CO lines at 217GHz). This is joined with a compact object mask synthesized from several Planck source [[Catalogues | catalogues]], including the [[ Catalogues#ERCSC | ERCSC]], [[ Catalogues#SZ | SZ ]] and [[ Catalogues#The Catalogue of Compact Sources | PCCS ]]. The reconstruction was performed using the fiducial beam window functions B(l) from the [[ The RIMO | HFI RIMO ]]. Details of the procedure used to produce a lensing estimate from these inputs are given in {{PlanckPapers|planck2013-p12}}.
  
 
===File names and format===
 
===File names and format===
  
A single file named ''COM_CompMap_Lensing_2048_R1.10.fits'' with two BINTABLE extensions containing the items described above.   
+
A single file named  
 +
*''{{PLASingleFile|fileType=map|name=COM_CompMap_Lensing_2048_R1.10.fits|link=COM_CompMap_Lensing_2048_R1.10.fits}}''  
 +
with two BINTABLE extensions containing the items described below.  
 +
   
 +
For illustration, we show in the figures below the maps of the Wiener-filtered CMB lensing potential in Galactic coordinates using orthographic projection. The reconstruction was bandpass filtered to <math>L \in [10, 2048]</math>. Note that the lensing reconstruction, while highly statistically significant, is still noise dominated for every individual mode, and is at best <math>S/N \simeq 0.7</math> around <math>L = 30</math>.
 +
 
 +
<center>
 +
<gallery perrow=3 widths=260px heights=170px>
 +
File: analysis_lens_pub_map_orth_north_dat_p.png | Galactic north
 +
File: analysis_lens_pub_map_orth_south_dat_p.png | Galactic south
 +
</gallery></center>
 +
 
 +
 
  
 
{| border="1" cellpadding="3" cellspacing="0" align="center" style="text-align:left"
 
{| border="1" cellpadding="3" cellspacing="0" align="center" style="text-align:left"
 +
|+ '''FITS file structure'''
 +
|- bgcolor="ffdead" 
 +
!colspan="4" | 1. EXTNAME = ''LENS-MAP''
 +
|-  bgcolor="ffdead" 
 
! Column Name || Data Type || Units || Description
 
! Column Name || Data Type || Units || Description
 
|-
 
|-
!colspan="4"| 1. EXTNAME = 'LENS-MAP' : Data columns
+
|PHIBAR || Real*4 || none || Map of the lensing potential estimate, convolved with RLPP
|-
+
|PHIBAR || Real*4 || none || Map of the lensing potential
+
 
|-
 
|-
 
|MASK || Int || none || Region over which the lensing potential is reconstructed
 
|MASK || Int || none || Region over which the lensing potential is reconstructed
 +
|- bgcolor="ffdead" 
 +
! Keyword || Data Type || Value || Description
 
|-
 
|-
|PIXTYPE || HEALPIX || colspan="2"|  
+
|PIXTYPE ||  string || HEALPIX || colspan="2"|  
 
|-
 
|-
|COORDSYS || GALACTIC ||colspan="2"| Coordinate system  
+
|COORDSYS || string || GALACTIC || Coordinate system  
 
|-
 
|-
|ORDERING || NESTED ||colspan="2"| Healpix ordering
+
|ORDERING ||  string || NESTED  || Healpix ordering
 
|-
 
|-
|NSIDE  ||  2048 ||colspan="2"| Healpix Nside
+
|NSIDE || Int*4 ||  2048 ||colspan="2"| Healpix Nside
 
|-
 
|-
|FIRSTPIX ||                   0 ||colspan="2"|
+
|FIRSTPIX || Int*4  ||         0 ||  
 
|-
 
|-
|LASTPIX ||         50331647 ||colspan="2"|
+
|LASTPIX || Int*4  || 50331647 ||
|-
+
|- bgcolor="ffdead" 
|-
+
!colspan="4"| 2. EXTNAME = ''TransFun''
!colspan="4"| 2. EXTNAME = 'TransFun'
+
|-  bgcolor="ffdead" 
 +
! Column Name || Data Type || Units || Description
 
|-
 
|-
|RLPP || Real*4 || none || Response function (see above)
+
|RLPP || Real*4 || none || Response function
 
|-
 
|-
|NLPP || Real*4 || none || sky-averaged noise spectrum
+
|NLPP || Real*4 || none || Sky-averaged noise power spectrum estimate
 +
|- bgcolor="ffdead" 
 +
! Keyword || Data Type || Value || Description
 
|-
 
|-
|L_MIN ||                   0 ||colspan="2"|
+
|L_MIN || Int*4  ||           0 || First multipole
 
|-
 
|-
|L_MAX ||         2048 ||colspan="2"|
+
|L_MAX || Int*4  || 2048 || Last multipole
 
|}
 
|}
  
The maps in Ext 1 are, as usual, in GALACTIC coordinates, Nside=2048 and in NESTED ordering.  The vectors in Ext 2 run from $l_{min} = 0$ to $l_{max} =2028$.
+
== IRAM Maps of the Crab nebula ==
  
 +
Maps of the Crab nebula at  89.189 GHz (HCO+(1-0) transition) in both temperature and polarization, prodouced from observations performed at the IRAM 30m telescope from January 9th to January 12th 2009, are delivered as a tarball of 416 KB in the file
  
 +
: [[File:Crab_IRAM_2010.zip]]
  
 +
See README in the tarball for full details. These data were used in{{BibCite|aumont2010}}
  
 +
==References==
 +
<References />
 +
  
  
  
  
[[Category:Mission science products|010]]
+
[[Category:Mission products|010]]

Latest revision as of 18:34, 23 July 2014

Overview

This section describes products that require special processing. Only one such product is available at this time; this section will be expanded with time as more products are added.

Lensing map

Description

Here we present the minimum-variance (MV) lens reconstruction which forms the basis for the main results of Planck-2013-XVII[1]. This map is produced using a combination of the 143 and 217 GHz Planck maps on approximately 70% of the sky, and is the same map on which the Planck lensing likelihood is based.

We distribute:

PHIBAR 
A (transfer-function convolved) map of the lensing potential, in NSIDE 2048 HEALPix([http://healpix.sourceforge.net Hierarchical Equal Area isoLatitude Pixelation of a sphere], {{BibCite|gorski2005}}) pixelation used to produce Planck sky maps (and HFI HPR). RING format. It is obtained by convolving the lensing potential estimate [math]\hat{\phi}[/math] with the lensing response function [math]R_L^{\phi\phi}[/math]. This map has been band-limited between multipoles [math]10 \le L \le 2048[/math].
MASK 
This is a NSIDE = 2048 HEALPix([http://healpix.sourceforge.net Hierarchical Equal Area isoLatitude Pixelation of a sphere], {{BibCite|gorski2005}}) pixelation used to produce Planck sky maps (and HFI HPR). map, containing the analysis mask used in the lens reconstruction. Note: the lensing map PHIBAR may take small but non-zero values inside the masked regions because it has been bandlimited.
RLPP 
This column contains the response function [math]R_L^{\phi\phi}[/math].
NLPP 
This column contains a sky-averaged estimate of the noise power spectrum of PHIBAR, [math]N_L^{\phi\phi}[/math]. The noise is highly coloured. There is a dependence of the noise power spectrum on the local noise level of the map, discussed in Appendix A of Planck-2013-XVII[1]. Note that the noise power spectrum estimate here is not sufficiently accurate for a power spectrum analysis.

Also, the table below gives the lensing curl-mode power spectrum data used to produce Figure A2 of Planck-2013-XVII[1]:

'MV' curl reconstruction bandpowers from Fig A2 of Planck-2013-XVII[1]
[math]L[/math]min [math]L[/math]max [math]{\hat{C}_L}^{\psi\psi} (L(L+1))^2/(2\pi)[/math] [math] std({\hat{C}_L}^{\psi\psi}) (L(L+1))^2 /(2\pi)[/math]
2 7 -13.6379 15.3409
8 20 6.0184 4.8881
21 39 -1.0675 3.0940
40 65 0.6135 1.8474
66 100 1.5030 1.2696
101 144 1.3760 0.9950
145 198 -1.2289 0.8286
199 263 1.1910 0.7001
264 338 -0.6567 0.6197
339 425 -0.8201 0.5235
426 525 -0.7581 0.4850
526 637 -0.3201 0.5134
638 762 -0.1589 0.4073
763 901 -0.6451 0.4044
902 1054 0.4910 0.3718
1055 1221 -0.2186 0.3702
1222 1404 -0.3295 0.4146
1405 1602 -0.3647 0.4703
1603 1816 -0.1060 0.5904
1817 2020 -0.7887 0.8507

Production process

The construction PHIBAR, RLPP and NLPP are described in detail in Sec. 2.1 of Planck-2013-XVII[1]. The response function [math]R_L^{\phi\phi}[/math] here is analogous to the the beam transfer function in a CMBCosmic Microwave background 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 CMBCosmic Microwave background temperature map from which it is derived, and therefore more useful for cross-correlation studies.

Inputs

This product is built from the 143 and 217 GHz Planck frequency maps, with 857GHz projected out as a dust template. The analysis mask is constructed from a combination of thresholding in the 857GHz map (to remove the regions which are most contaminated by Galactic dust) and the Type2 CO map (to reduce contamination from CO lines at 217GHz). This is joined with a compact object mask synthesized from several Planck source catalogues, including the ERCSC, SZ and PCCS . The reconstruction was performed using the fiducial beam window functions B(l) from the HFI RIMO . Details of the procedure used to produce a lensing estimate from these inputs are given in Planck-2013-XVII[1].

File names and format

A single file named

with two BINTABLE extensions containing the items described below.

For illustration, we show in the figures below the maps of the Wiener-filtered CMBCosmic Microwave background lensing potential in Galactic coordinates using orthographic projection. The reconstruction was bandpass filtered to [math]L \in [10, 2048][/math]. Note that the lensing reconstruction, while highly statistically significant, is still noise dominated for every individual mode, and is at best [math]S/N \simeq 0.7[/math] around [math]L = 30[/math].


FITSFlexible Image Transfer Specification file structure
1. EXTNAME = LENS-MAP
Column Name Data Type Units Description
PHIBAR Real*4 none Map of the lensing potential estimate, convolved with RLPP
MASK Int none Region over which the lensing potential is reconstructed
Keyword Data Type Value Description
PIXTYPE string HEALPIX
COORDSYS string GALACTIC Coordinate system
ORDERING string NESTED Healpix ordering
NSIDE Int*4 2048 Healpix Nside
FIRSTPIX Int*4 0
LASTPIX Int*4 50331647
2. EXTNAME = TransFun
Column Name Data Type Units Description
RLPP Real*4 none Response function
NLPP Real*4 none Sky-averaged noise power spectrum estimate
Keyword Data Type Value Description
L_MIN Int*4 0 First multipole
L_MAX Int*4 2048 Last multipole

IRAM Maps of the Crab nebula

Maps of the Crab nebula at 89.189 GHz (HCO+(1-0) transition) in both temperature and polarization, prodouced from observations performed at the IRAM 30m telescope from January 9th to January 12th 2009, are delivered as a tarball of 416 KB in the file

File:Crab IRAM 2010.zip

See README in the tarball for full details. These data were used in[2]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Planck 2013 results: Gravitational lensing by large-scale structure, Planck Collaboration XVII, A&A, in press, (2014).
  2. Measurement of the Crab nebula polarization at 90 GHz as a calibrator for CMB experiments, J. Aumont, L. Conversi, C. Thum, H. Wiesemeyer, E. Falgarone, J. F. Macías-Pérez, F. Piacentini, E. Pointecouteau, N. Ponthieu, J. L. Puget, C. Rosset, J. A. Tauber, M. Tristram, A&A, 514, A70+, (2010).