Introduction

The 2PCF-GC Processing Function is in charge of measuring the 3D two-point correlation function of Euclid galaxies. All the 2PCF-GC output data products can be obtained from the same input products, and using a similar methodology.

Optionally, the code can receive as input random pair counts from a previous run. The code computes and stores only the pair counts not read in input.

The flowcharts of the 2PCF-GC products are the following:

• Angle-averaged two-point auto-correlation function

• Angle-averaged two-point cross-correlation function

• Post-reconstruction angle-averaged two-point auto-correlation function

• Post-reconstruction angle-averaged two-point cross-correlation function

• 2D Cartesian two-point auto-correlation function and projected two-point auto-correlation function

• 2D Cartesian two-point cross-correlation function and projected two-point cross-correlation function

• Post-reconstruction 2D Cartesian two-point auto-correlation function and post-reconstruction projected two-point auto-correlation function

• Post-reconstruction 2D Cartesian two-point cross-correlation function and post-reconstruction projected two-point cross-correlation function

• 2D polar two-point auto-correlation function and multipoles of the two-point auto-correlation function

• 2D polar two-point cross-correlation function and multipoles of the two-point cross-correlation function

• Post-reconstruction 2D polar two-point auto-correlation function and post-reconstruction multipoles of the two-point auto-correlation function

• Post-reconstruction 2D polar two-point cross-correlation function and post-reconstruction multipoles of the two-point cross-correlation function

Input products

• Input - 2PCF-GC Configuration Set

• Input - GC mock Data Catalog Product

• Input - GC mock RANDOM Catalog Product

Output products

• Output - 1D [Angle-averaged Cross-correlation Product]

• Output - 1D [Post-reconstruction Angle-averaged Cross-correlation Product]

• Output - 1D [Post-reconstruction Angle-averaged Auto-correlation Product]

• Output - 1D [Angle-averaged Auto-correlation Product]

• Output - 2D Cartesian [2D Cartesian and Projected Cross-correlation Product]

• Output - 2D Cartesian [Post-reconstruction 2D Cartesian and Projected Cross-correlation Product]

• Output - 2D Cartesian [Post-reconstruction 2D Cartesian and Projected Auto-correlation Product]

• Output - 2D Cartesian [2D Cartesian and Projected Auto-correlation Product]

• Output - 2D Polar [2D Polar and Multipole Cross-correlation Product]

• Output - 2D Polar [Post-reconstruction 2D Polar and Multipole Cross-correlation Product]

• Output - 2D Polar [Post-reconstruction 2D Polar and Multipole Auto-correlation Product]

• Output - 2D Polar [2D Polar and Multipole Auto-correlation Product]