Difference between revisions of "NILC PR4 Compton y-map"

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==== Compton y-maps ====
 
==== Compton y-maps ====
  
 +
[[File:NILC-ymap-PR4.png|600px|Figure1]]
  
 
Figure 1. The PR4 NILC Compton y-map visualized in orthographic projection.
 
Figure 1. The PR4 NILC Compton y-map visualized in orthographic projection.
  
−
In addition to the full-mission PR4 y-map (Figure 1), maps produced from the two half-ring data splits (HR1 and HR2 y-maps) are provided for noise characterization. The angular resolution of the y-maps is 10 arcmin.  
+
In addition to the full-mission PR4 y-map (Figure 1), maps produced from the two half-ring data splits (HR1 and HR2 y-maps) are provided for noise characterization. The angular resolution of the y-maps is 10 arcmin.
  
 
==== Masks ====  
 
==== Masks ====  
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{| border="1" cellpadding="3" cellspacing="0" align="center" style="text-align:left" width=800px
 
{| border="1" cellpadding="3" cellspacing="0" align="center" style="text-align:left" width=800px
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|+ '''Full-resolution raw posterior mean CMB map'''
+
|+ '''Maps'''
 
|- bgcolor="ffdead"   
 
|- bgcolor="ffdead"   
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!colspan="4" | Filename = Compton-SZMap-NILC-ymap_2048_PR4.00.fits  
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!colspan="4" | Filename = Compton-SZMap-NILC-ymap_2048_PR4.fits  
 
|- bgcolor="ffdead"  
 
|- bgcolor="ffdead"  
 
|- bgcolor="ffdead"   
 
|- bgcolor="ffdead"   
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! Column Name || Description
 
! Column Name || Description
 
|-
 
|-
−
|FULL || The CMB intensity map
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|FULL || NILC full-mission y-map
 
|-
 
|-
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|HALF-RING 1 || NILC half-ring 1 y-map
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|HALF_RING 1 || NILC half-ring 1 y-map
 
|-
 
|-
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|HALF-RING 2 || NILC half-ring 2 y-map
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|HALF_RING 2 || NILC half-ring 2 y-map
 
|- bgcolor="ffdead"   
 
|- bgcolor="ffdead"   
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! Keyword || Data Type || Value || Description
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! Keyword || Value
 
|-
 
|-
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|COORDSYS ||  string || GALACTIC ||Coordinate system
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|COORDSYS || GALACTIC  
 
|-
 
|-
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|ORDERING || string || RING || Healpix ordering
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|ORDERING || RING  
 
|-
 
|-
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|NSIDE  ||  Int || 2048 || Healpix Nside    
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|NSIDE  ||   2048
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|}
 +
 
 +
{| border="1" cellpadding="3" cellspacing="0" align="center" style="text-align:left" width=800px
 +
|+ '''Masks'''
 +
|- bgcolor="ffdead" 
 +
!colspan="4" | Filename = Compton-SZMap-NILC-ymap_2048_PR4_masks.fits
 +
|- bgcolor="ffdead"
 +
|- bgcolor="ffdead" 
 +
!colspan="4" | EXTNAME = 'MASKS' : Data columns
 +
|- bgcolor="ffdead"    
 +
! Column Name || Description
 +
|-
 +
|NILC_MASK  || NILC processing mask (fsky=0.98)
 +
|-
 +
|GAL_MASK || Galactic mask (fsky =0.60)
 +
|-
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|PS_MASK || Point-source mask (fsky =0.93)
 +
|- bgcolor="ffdead"    
 +
! Keyword || Value
 +
|-
 +
|COORDSYS || GALACTIC
 +
|-
 +
|ORDERING ||  RING
 +
|-
 +
|NSIDE  ||    2048
 
|}
 
|}

Latest revision as of 10:41, 5 December 2023

NILC PR4 Compton y-map[edit]

Overview[edit]

We provide an updated thermal SZ Compton y-parameter map reconstructed using NILC from the Planck data release 4 (PR4). This product improves upon the 2015 Compton y-parameter map. The data products are described in detail in Chandran et al. (2023).

Data Products[edit]

The data products consist of the full-mission PR4 y-map, the half-ring PR4 y-maps, and associated masks. They are available in the Planck Legacy Archive.

Compton y-maps[edit]

Figure1

Figure 1. The PR4 NILC Compton y-map visualized in orthographic projection.

In addition to the full-mission PR4 y-map (Figure 1), maps produced from the two half-ring data splits (HR1 and HR2 y-maps) are provided for noise characterization. The angular resolution of the y-maps is 10 arcmin.

Masks[edit]

A small processing mask (NILC-MASK) of sky fraction (fsky) ~ 0.98 is applied to the Planck frequency maps before component separation to avoid ringing effects. A Galactic mask (GAL-MASK) of fsky ~ 0.6 and a point-source mask (PS-MASK) of fsky ~ 0.93 are used for different analyses. Combined, the analysis mask (GAL-MASK + PS-MASK) has an fsky ~ 0.56. The GAL-MASK and NILC-MASK are the same as those used in Planck 2015 results. XXII. The PS-MASK mask is derived from the point-source masks generated by M. López-Caniego for PR4 as a part of the Sevem pipeline.

Maps
Filename = Compton-SZMap-NILC-ymap_2048_PR4.fits
EXTNAME = 'FREQ-MAP' : Data columns
Column Name Description
FULL NILC full-mission y-map
HALF_RING 1 NILC half-ring 1 y-map
HALF_RING 2 NILC half-ring 2 y-map
Keyword Value
COORDSYS GALACTIC
ORDERING RING
NSIDE 2048
Masks
Filename = Compton-SZMap-NILC-ymap_2048_PR4_masks.fits
EXTNAME = 'MASKS' : Data columns
Column Name Description
NILC_MASK NILC processing mask (fsky=0.98)
GAL_MASK Galactic mask (fsky =0.60)
PS_MASK Point-source mask (fsky =0.93)
Keyword Value
COORDSYS GALACTIC
ORDERING RING
NSIDE 2048

Sunyaev-Zel'dovich

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