Introduction
============


The LE3 :term:`Processing Function` is responsible for computing high level data products relevant to the Euclid project.

LE3 is organized in 7 work packages (:term:`WP`) covering different scientific areas illustrated in the figure below (with core science :term:`WP` in Euclid in blue):

.. image:: LE3_WorkPackages.png

These work packages are further divided into individual independent :term:`PF`.

The present document describe the data products for core science priority 1/2 :term:`Processing Function`.

For :ref:`WP-WL`:

* :ref:`PF-2PCF-WL`: tomographic :term:`2PCF` [**Priority 1**]
* :ref:`PF-CM-2PCF-WL`: covariance of tomographic :term:`2PCF` [**Priority 1**]
* :ref:`PF-PK-WL`:  tomographic Fourier space second order statistics. [**Priority 1**]
* :ref:`PF-CM-PK-WL`:  covariance of tomographic Fourier space second order statistics. [**Priority 1**]
* :ref:`PF-2D-MASS-WL`:  2D mass maps and SNR maps derived from shear measurements. [**Priority 2**]
* :ref:`PF-3D-WL`:  3D E/B mode power spectrum derived from shear measurements. [**Priority 2**]

For :ref:`WP-GC`:

* :ref:`PF-2PCF-GC`: 3D :term:`2PCF` for galaxy redshift catalogs [**Priority 1**]
* :ref:`PF-CM-2PCF-GC`: covariance of 3D :term:`2PCF` for galaxy redshift catalogs [**Priority 1**]
* :ref:`PF-PK-GC`:  3D power spectrum for galaxy redshift catalogs. [**Priority 1**]
* :ref:`PF-CM-PK-GC`:  covariance of 3D power spectrum for galaxy redshift catalogs. [**Priority 1**]
* :ref:`PF-3PCF-GC`:  3D :term:`3PCF` for galaxy redshift catalogs. [**Priority 2**]
* :ref:`PF-BK-GC`:  bispectrum for galaxy redshift catalogs.  [**Priority 2**]


For :ref:`WP-CL`:

* :ref:`PF-DET-CL`: Galaxy cluster detection [**Priority 2**]
* :ref:`PF-RICH-CL`: Richness of galaxy clusters [**Priority 3**]
* :ref:`PF-PROF-CL`: Radial Profile of galaxy clusters [**Priority 3**]

For :ref:`WP-ID`:

* :ref:`PF-VMPZ-ID`: Photometric redshift selection function [**Priority 1**]
* :ref:`PF-VMSP-ID`: Spectroscopic redshift selection function [**Priority 1**]
* :ref:`PF-SEL-ID`:  Purity and completeness of galaxy samples and the selection of a catalog that maximizes both [**Priority 1**]

For :ref:`WP-ED`:

* :ref:`PF-GALEXT-ED`: Galactic extinction maps and their errors [**Priority 1**]


.. This is the section that should contain the summary flowchart of the :term:`Processing Function`, where the products that will be described should appear quite clearly. In principle, this flow-chart should be no different from the one already present in the RSD and possibly in the Software Design Document, and at least we encourage to have a single flow-chart between the RSD and the :term:`DPDD`. The idea is to guide the reader of the DPDD toward a more detailed understanding of the role of the products in the pipeline.