Euclid Quick Data Release (Q1). From images to multi-wavelength catalogues: The Euclid MERge Processing Function

The Euclid satellite is an ESA mission that was launched in July 2023. Euclid is working in its regular observing mode with the target of observing an area of $14,000 deg ^2$ with two instruments, the Visible Camera (VIS) and the Near IR Spectrometer and Photometer (NISP) down to text IE mag ($10, σ$) in the Euclid Wide Survey. Ground-based imaging data in the ugriz bands complement the Euclid data to enable photo-z determination and VIS PSF modelling for weak lensing analysis. Euclid investigates the distance-redshift relation and the evolution of cosmic structures by measuring the shapes and redshifts of galaxies and clusters of galaxies out to z∼ 2. Generating the multi-wavelength catalogues from Euclid and ground-based data is an essential part of the Euclid data processing system. In the framework of the Euclid Science Ground Segment (SGS), the aim of the MERge Processing Function (MER PF) pipeline is to detect objects in the Euclid imaging data, measure their properties, and merge them into a single multi-wavelength catalogue. The MER PF pipeline performs source detection on both visible (VIS) and near-infrared (NIR) images and offers four different photometric measurements: Kron total flux, aperture photometry on PSF-matched images, template fitting photometry, and S'ersic fitting photometry. Furthermore, the MER PF pipeline measures a set of ancillary quantities, spanning from morphology to quality flags, to better characterise all detected sources. In this paper, we show how the MER PF pipeline is designed, detailing its main steps, and we show that the pipeline products meet the tight requirements that Euclid aims to achieve on photometric accuracy. We also present the other measurements (e.g., morphology) that are included in the OU-MER output catalogues and we list all output products coming out of the MER PF pipeline.

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Publication Details

Journal
Astronomy and Astrophysics
Published
2025-06-06
DOI
https://doi.org/10.1051/0004-6361/202554586
Citations
2
Primary Topic
Astronomy and Astrophysical Research
Type
article
Field-Weighted Citation Impact
2.38
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Euclid Quick Data Release (Q1). From images to multi-wavelength catalogues: The Euclid MERge Processing Function

D Sapone, G. Seidel, J. Brinchmann, F Passalacqua et al.
2 citations
Astronomy and Astrophysics
Astronomy and Astrophysical Research
2.38
article

Euclid Quick Data Release (Q1). From images to multi-wavelength catalogues: The Euclid MERge Processing Function

D Sapone, G. Seidel, J. Brinchmann, F Passalacqua, Will J. Percival, M. Ballardini, E. A. Magnier, R. P. Saglia, S Sacquegna, A Balestra, S Matthew, A. Pisani, F. Gianotti, D. Le Mignant, M. Brescia, E. Gaztanaga, R. Laureijs, S Toft, I. Hook, M. Kunz, G de Lucia, R Nakajima, B. Joachimi, A. Boucaud, C. Baccigalupi, J. Carretero, S Bardelli, J. Steinwagner, D. B. Sanders, F. Marulli, H Hildebrandt, M. Sereno, A. Navarro-Alsina, G Zamorani, M. Martinelli, H. Israel, Francesca Lepori, L Patrizii, E Rossetti, S Gwyn, K George, K Kiiveri, A. Franco, J. F. Macías–Pérez, Paola Dimauro, F. Courbin, Y. Copin, Alex D. Hall, Michael D. Brown, F Caro, Elena Sellentin, A. Díaz‐Sánchez, G. Gozaliasl, S Nadathur, S. Maurogordato, S. Mei, A. N. Belikov, G. Desprez, F Faustini, Francisco Javier Castander, Daniele Bertacca, M. Radovich, Alberto Basset, A. Amara, G Castignani, C.J.A.P. Martins, V. Capobianco, Laura Leuzzi, L. Moscardini, J Hjorth, G. Polenta, L. Gabarra, M Miluzio, B Altieri, J Le Graet, A. Kiessling, S. V. H. Haugan, K Ganga, T. Vassallo, A Enia, A Troja, M.D Lepinzan, Antoine Blanchard, S. Dusini, M Castellano, R. Toledo-Moreo, B. Camacho Quevedo, S Bruton, M. Moresco, B. R. Granett, Y Fang, M. Kilbinger, M. Schultheis, M. Meneghetti, H. J. McCracken, G. Testera, J.W Nightingale, M. Poncet, G. Congedo, A. Cappi, T.I Liaudat, F Finelli, Simon Conseil, N Tessore, B Gillis, C. Mancini, E. Romelli, A. M. Di Giorgio, S Quai, Christopher J. Conselice, Henk Hoekstra, J. Weller, P. Reimberg, A. Biviano, H. Degaudenzi, O. Mansutti, I.A Zinchenko, D Tavagnacco, Matteo Viel, Julien Lesgourgues, I Risso, V. Allevato, C Sirignano, W. Gillard, E. Zucca, S. Escoffier, C. Padilla Aranda, K. Pedersen, L Blot, E. Maiorano, A. Tsyganov, Maria Lembo, John R. Weaver, D. Vergani, C. Porciani, W. Gillard, M Sahlén, M. Roncarelli, F. Dubath, F. De Paolis, A. Finoguenov, S Casas, Jenny G. Sorce, R. B. Metcalf, A. Hornstrup, E. Medinaceli, Sergey Kruk, M. Pöntinen, S. Di Domizio, Maximilian Fabricius, R. B. Metcalf, F. M. Zerbi, D Scott, M. Béthermin, É. Soubrié, K. Jahnkę, A. M. N. Ferguson, A. Secroun, F. Hormuth, M. Farina, R. Laureijs, F. Mannucci, M. Magliocchetti, M Jhabvala, F. Pasian, A. Venhola, C.A.J Duncan, V. Kansal, S Anselmi, S Borgani, S. Ligori, F. Grupp, F. Giacomini, S. Galeotta, S Paltani, F. Raison, E. Franceschi, P. Tallada-Crespí, W G Hartley, E. A. Valentijn, A. Fontana, J.A Schewtschenko, Marco Baldi, P.‐A. Duc, J Martín-Fleitas, T Castro, E. Merlin, P. Monaco, M. Scodeggio, N. Martinet, Q. Le Boulc'h, Pardis Simon, N. A. Walton, G Rodighiero, C. Giocoli, S. Marcin, J. Gracia-Carpio, I.T Andika, Savvas Nesseris, Mike Walmsley, R Teyssier, S. Camera, Z. Sakr, K Tanidis, L. Legrand, C. Neissner, M Schirmer, E. Bozzo, LAURENCE C. SMITH, V. Pettorino, G.F Lesci, Asantha Cooray, K. C. Chambers, D. Bonino, M. Archidiacono, R. Gavazzi, V. Lindholm, Jason Rhodes, Antonella Tramacere, L. Conversi, E. Sefusatti, R Farinelli, P.-F Rocci, A Grazian, M. Cropper, E. Keihänen, E Branchini, B. Sartoris, G. Meylan, P Vielzeuf, P. C. Schneider, Krishna Naidoo, A da Silva, N. Auricchio, M. Frailis, V Scottez, A. Spurio Mancini, Ranga‐Ram Chary, R Massey, G Sirri, C. Carbone, S. Serrano, K. Paterson, S. Kermiche, H.I Teplitz, Arthur Loureiro, Valerio Roscani, P. Bergamini, E Sarpa, J. M. Diego, R da Silva, Claudia Scarlata, R. J. Bouwens, P. B. Lilje, M Melchior, A Veropalumbo, C.S. Carvalho, A Pezzotta, C. Burigana, O Marggraf, G. Mainetti, A.M.C Le Brun, D. Potter, M. Douspis, S Cavuoti, L. Pozzetti, A. Cimatti, Y. Akrami, F. Atrio‐Barandela, Claudio Moretti, H. M. Courtois, R. C. Nichol, F. Cogato, D Sciotti, P Casenove, Yun Wang, L. Stančo, L. Maurin, G. Riccio, C. M. Gutiérrez, D Karagiannis, Y. W. Kang, S Alvi, M. D. Seiffert, V Le Brun, I. Tutusaus, M Bolzonella, S. Pires, G Maggio, N Mauri, M. Tenti, J García-Bellido, I. Tereno, A. Schneider, L. A. Popa, P Battaglia, A Calabro, G Morgante, O Cucciati, H. Kurki‐Suonio, S. Davini, M. Wiesmann, P. Liebing, H. Dole, F Torradeflot, C. Hernández-Monteagudo, J.A. Escartin Vigo, B. Kubik, R Cabanac, D. Di Ferdinando, I. Lloro, S. Andreon, W. Holmes, J. G. Cuby, Y. Ascasíbar, J Valiviita, X. Dupac, M Tucci, S. Fotopoulou, N. Fourmanoit, A. N. Taylor, G Verza, L Valenziano, K Kuijken, N. Aghanim, C Valieri, S.-M. Niemi, A. Mora, A.G. S'anchez, S. Tosi, Y. Mellier, M Guidi, S. Ferriol, G. Ca nas-Herrera, S. de la Torre, H. Böhringer, M. Kümmel, A. Renzi
article en
2 citations

Abstract

The Euclid satellite is an ESA mission that was launched in July 2023. Euclid is working in its regular observing mode with the target of observing an area of $14,000 deg ^2$ with two instruments, the Visible Camera (VIS) and the Near IR Spectrometer and Photometer (NISP) down to text IE mag ($10, σ$) in the Euclid Wide Survey. Ground-based imaging data in the ugriz bands complement the Euclid data to enable photo-z determination and VIS PSF modelling for weak lensing analysis. Euclid investigates the distance-redshift relation and the evolution of cosmic structures by measuring the shapes and redshifts of galaxies and clusters of galaxies out to z∼ 2. Generating the multi-wavelength catalogues from Euclid and ground-based data is an essential part of the Euclid data processing system. In the framework of the Euclid Science Ground Segment (SGS), the aim of the MERge Processing Function (MER PF) pipeline is to detect objects in the Euclid imaging data, measure their properties, and merge them into a single multi-wavelength catalogue. The MER PF pipeline performs source detection on both visible (VIS) and near-infrared (NIR) images and offers four different photometric measurements: Kron total flux, aperture photometry on PSF-matched images, template fitting photometry, and S'ersic fitting photometry. Furthermore, the MER PF pipeline measures a set of ancillary quantities, spanning from morphology to quality flags, to better characterise all detected sources. In this paper, we show how the MER PF pipeline is designed, detailing its main steps, and we show that the pipeline products meet the tight requirements that Euclid aims to achieve on photometric accuracy. We also present the other measurements (e.g., morphology) that are included in the OU-MER output catalogues and we list all output products coming out of the MER PF pipeline.

Astronomy and Astrophysics
Délégation Paris 7 (FR), Université Paris Cité (FR), Université de Lille (FR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Centre National d'Études Spatiales (FR), Institut d'Astrophysique de Paris (FR), European Space Agency (FR), Laboratoire AstroParticule et Cosmologie (FR), Observatoire astronomique de Strasbourg (FR), Astrophysique, Instrumentation et Modélisation (FR), Janssen (France) (FR), Laboratoire Univers et Théories (FR), Centre de physique des particules de Marseille (FR), Laboratoire d’Astrophysique de Marseille (FR), Institut d'Astrophysique Spatiale (FR), Galaxies, Etoiles, Physique et Instrumentation (FR), Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères (FR), Lagrange Laboratory (FR), Château Gombert (FR), CEA Paris-Saclay (FR), Laboratoire de Physique Subatomique et de Cosmologie (FR), Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (FR), Institute of Nuclear Physics of Lyon (FR), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Institut de Recherche en Astrophysique et Planétologie (FR), Institut de Physique des 2 Infinis de Lyon (FR)
Openalex Percentile: Top 12%
Astronomy and Astrophysical Research
2.38
DOIOpen Access PDFOpenAlex
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