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.

In addtion to the image products, the MER processing Pipeline takes the EXT GaiaCutout catalog product as input. If provided the MER Final Catalog Product includes the Gaia catalog cross-match information and flags for sources close to Gaia sources that are likely false positives detections.

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

• Configuration Set Product

• DQC Static Flag Limits Product

• Tile Product

• True Universe Star Catalog Product

• True Universe Galaxy Catalog Product

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

• Background-Subtracted Mosaic Product

• Detection Mosaic Product

• Segmentation Map Product

• Final Catalog Product

• Analysis Result Product