Introduction

The MER Processing Function realizes the merging of all the level 2 information and provides source catalogs containing photometric and morphological object information relevant to the Euclid project.

Inputs to the MER Pipeline are image lists (calibrated frames and stacks) and associated products (PSFs, zero points) provided by the VIS, NIR and EXT Stage-2 Processing Functions. Some of these inputs are optional, since the MER pipeline is flexible enough to work even in those cases when some of the NIR calibrated frames or the EXT stacks are not available.

There are several types of MER products. Products that are inputs to the MER science, analysis and validation pipelines:

• Configuration Set Product

• DQC Static Flag Limits Product

• Tile Product

• Tile List Product

• True Universe Star Catalog Product

• True Universe Galaxy Catalog Product

• Validation Requirements Product

• Machine Learning Model Product

Products that are outputs of the MER science, analysis and validation pipelines:

• Background-subtracted Mosaic Product

• Detection Mosaic Product

• Segmentation Map Product

• Final Catalog Product

• Cross-Matched Catalog Product

• Analysis Result Product

• Validation Result Product

Intermediate products that used inside the MER pipelines but are not ingested in the Euclid Archive System:

• Mosaic Product

• Object Catalog Product

• Morphology Catalog Product

• Single Band Catalog Product

• PSF Stamp Collection Product

• PSF Transformation Kernel Product