Euclid Bypass end-to-end simulations for spectroscopic galaxy clustering performance assessment
Year: 2026
Type: preprint
Abstract: We present a simulation framework for Euclid galaxy clustering measurements that reproduces the essential behaviour of the spectroscopic reduction chain, bypassing the computation required by full pixel-level simulations. The framework comprises two complementary tools, FastSpec, which simulates 1-dimensional slitless spectra with a simplified instrument and noise model, and Pypelid, which computes detection probabilities on input catalogues, accounting for the survey dithering sequence and spatially varying noise. We develop calibrated prescriptions for the survey selection function, redshift errors, and redshift interloper populations. Applied to the Euclid Wide Survey, the baseline selection yields a redshift purity of 74% and a sample completeness of 45%, which improves with the use of Euclid photometric colours. The redshift error distribution is found to have a Gaussian core of width $σ_z = 9.4 \times 10^{-4}$, with no significant trend over $0.9 < z < 1.8$. Emission lines [OIII]5008 and [SIII]9530 misidentified as H$α$ contribute a few to ten per cent depending on redshift, while catastrophic redshift measurement failures dominate at low signal-to-noise ratio. Simulating the Data Release 1 footprint, we find that complex survey selection effects can be corrected with a forward-modelled random catalogue, recovering the monopole and quadrupole of the galaxy 2-point correlation function. The simplified noise model does not include residual contamination from overlapping spectra, or other artefacts seen in early Euclid data; this will be revisited with DR1 data. The framework provides an efficient route for characterising the Euclid spectroscopic selection function at the precision required for galaxy clustering science, and is the basis for systematic error assessments in Euclid galaxy clustering analyses.
Source: arXiv (Cornell University)
Authors: Euclid Collaboration, Granett, B. R., de la Torre, S., Moresco, M., Farina, A., Bethermin, M., Zabelle, B., Bruton, S., Markovic, K., Risso, I., Lee, S., McCarthy, K. S., Ilbert, O., Brun, V. Le, Monaco, P., Nedkova, K. V., Scarlata, C., Guzzo, L., Percival, W. J., Wang, Y., Cañas-Herrera, G., Sirignano, C., Altieri, B., Andreon, S., Auricchio, N., Baccigalupi, C., Baldi, M., Bardelli, S., Battaglia, P., Biviano, A., Bolzonella, M., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Castellano, M., Castignani, G., Cavuoti, S., Chabaud, P. -Y., Cimatti, A., Colodro-Conde, C., Congedo, G., Conversi, L., Copin, Y., Costille, A., Courbin, F., Courtois, H. M., Degaudenzi, H., De Lucia, G., Dole, H., Dubath, F., Dupac, X., Dusini, S., Escoffier, S., Farina, M., Farinelli, R., Faustini, F., Ferriol, S., Finelli, F., Fosalba, P., Fotopoulou, S., Fourmanoit, N., Frailis, M., Franceschi, E., Gabarra, L., Galeotta, S., George, K., Gillis, B., Giocoli, C., Gracia-Carpio, J., Grazian, A., Grupp, F., Haugan, S. V. H., Hemmati, S., Holmes, W., Hormuth, F., Hornstrup, A., Jahnke, K., Jhabvala, M., Joachimi, B., Kermiche, S., Kiessling, A., Kubik, B., Kümmel, M., Kunz, M., Kurki-Suonio, H., Laureijs, R., Brun, A. M. C. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Magliocchetti, M., Mainetti, G., Mansutti, O., Marggraf, O., Martinelli, M., Martinet, N., Marulli, F., Massey, R. J., Mauri, N., Medinaceli, E., Meneghetti, M., Merlin, E., Meylan, G., Mora, A., Moretti, C., Moscardini, L., Nakajima, R., Neissner, C., Niemi, S. -M., Nightingale, J. W., Padilla, C., Paltani, S., Pasian, F., Peacock, J. A., Pettorino, V., Pezzotta, A., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Renzi, A., Rhodes, J., Riccio, G., Rizzo, F., Romelli, E., Roncarelli, M., Rusholme, B., Saglia, R., Sakr, Z., Sánchez, A. G., Sapone, D., Sartoris, B., Schneider, P., Schrabback, T., Scodeggio, M., Secroun, A., Sihvola, E., Sirri, G., Stanco, L., Starck, J. -L., Surace, C., Tallada-Crespí, P., Tavagnacco, D., Taylor, A. N., Tereno, I., Tessore, N., Toft, S., Toledo-Moreo, R., Torradeflot, F., Tutusaus, I., Valiviita, J., Vassallo, T., Veropalumbo, A., Vibert, D., Weller, J., Zacchei, A., Zamorani, G., Zerbi, F. M., Zinchenko, I. A., Zucca, E., Ballardini, M., Bergamini, P., Boucaud, A., Bozzo, E., Burigana, C., Cabanac, R., Calabrese, M., Cappi, A., Caro, F., Castro, T., Daste, G., Vigo, J. A. Escartin, García-Bellido, J., Gasparetto, T., Gautard, V., Macias-Perez, J., Maoli, R., Metcalf, R. B., Nucita, A. A., Pöntinen, M., Sarpa, E., Scottez, V., Sereno, M., Tenti, M., Tucci, M., Viel, M., Wiesmann, M., Barroso, J. A. Acevedo, Akrami, Y., Andika, I. T., Anselmi, S., Archidiacono, M., Aricò, G., Atrio-Barandela, F., Avila, S., Baes, M., Bazzanini, L., Bel, J., Bertacca, D., Beutler, F., Blanchard, A., Blot, L., Bonici, M., Brown, M. L., Calabro, A., Quevedo, B. Camacho, Carrilho, P., Carvalho, C. S., Cogato, F., Collett, T. E., Conseil, S., Contarini, S., Cooray, A. R., Corcho-Caballero, P., Csizi, B., Cucciati, O., Davini, S., de Boer, T., De Paolis, F., Desprez, G., Díaz-Sánchez, A., Di Domizio, S., Diego, J. M., Duret, V., Elkhashab, M. Y., Enia, A., Fang, Y., Finoguenov, A., Franco, A., Fu, Y., Ganga, K., Gaztanaga, E., Ghaffari, Z., Giacomini, F., Gianotti, F., Gozaliasl, G., Gruppuso, A., Guidi, M., Gutierrez, C. M., Hall, A., Hernández-Monteagudo, C., Hildebrandt, H., Hjorth, J., Jauzac, M., Joudaki, S., Kajava, J. J. E., Kang, Y., Kansal, V., Karagiannis, D., Kim, J., Kirkpatrick, C. C., Kovács, A., Kovačič, I., Koyama, K., Kruk, S., Lam, M. C., Leclercq, F., Legrand, L., Lembo, M., Leroy, G., Lesci, G. F., Lesgourgues, J., Linke, L., Liu, S. J., Maggio, G., Mannucci, F., Marleau, F. R., Martins, C. J. A. P., Migliaccio, M., Miluzio, M., Morgante, G., Nadathur, S., Naidoo, K., Natoli, P., Navarro-Alsina, A., Nesseris, S., Nicastro, L., Oppizzi, F., Pace, F., Palazzi, E., Paoletti, D., Parimbelli, G., Passalacqua, F., Paterson, K., Patrizii, L., Pattison, C., Pisani, A., Potter, D., Pratt, G. W., Quai, S., Radovich, M., Roster, W., Sacquegna, S., Sahlén, M., Sanders, D. B., Schneider, A., Sciotti, D., Sellentin, E., Serjeant, S., Smith, L. C., Szapudi, I., Talia, M., Tanidis, K., Tao, C., Tarsitano, F., Testera, G., Teyssier, R., Tosi, S., Troja, A., Uhlemann, C., Venhola, A., Vergani, D., Vinciguerra, S., von Wietersheim-Kramsta, M., Wang, L., Wright, A. H., Yeung, H. W., Scott, D.
Institutions: Brera Astronomical Observatory, Centre National de la Recherche Scientifique, Aix-Marseille Université, Osservatorio di Astrofisica e Scienza dello Spazio, National Institute for Astrophysics, University of Bologna, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Observatoire astronomique de Strasbourg, Université de Strasbourg, University of Minnesota, California Institute of Technology, Jet Propulsion Laboratory, University of Genoa, Ohio University, Kavli Institute for the Physics and Mathematics of the Universe, University of Trieste, Trieste Astronomical Observatory, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Institute for Fundamental Physics of the Universe, Infrared Processing and Analysis Center, University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, University of Waterloo, Perimeter Institute, Leiden University, Leiden Observatory, University of Padua, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, European Space Astronomy Centre, Scuola Internazionale Superiore di Studi Avanzati, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Astronomical Observatory of Capodimonte, University of Naples Federico II, European Southern Observatory, Universidade do Porto, Institute of Astrophysics and Space Sciences, Centro de Astrofísica da Universidade do Porto, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Osservatorio Astrofisico di Torino, University of Turin, Port d'Informació Científica, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Astronomical Observatory of Rome, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Instituto de Astrofísica de Canarias, Royal Observatory, University of Edinburgh, European Space Agency, European Space Research Institute, Lyon 1 Université, Institut National de Physique Nucléaire et de Physique des Particules, Institut de Physique des 2 Infinis de Lyon, Institució Catalana de Recerca i Estudis Avançats, Institute of Space Sciences, Institut de Ciències del Cosmos, University of Geneva, Université Paris-Saclay, Institut d'Astrophysique Spatiale, Centre de physique des particules de Marseille, Institute for Space Astrophysics and Planetology, Institut d'Estudis Espacials de Catalunya, University of Bristol, University of Oxford, Ludwig-Maximilians-Universität München, Max Planck Institute for Extraterrestrial Physics, Osservatorio Astronomico di Padova, University of Oslo, Technical University of Denmark, Max Planck Institute for Astronomy, Goddard Space Flight Center, University College London, University of Helsinki, Helsinki Institute of Physics, University of Groningen, Université Paris Sciences et Lettres, Observatoire de Paris, Sorbonne Université, Laboratoire d'Étude de l'Univers et des Phénomènes Extrêmes, SKA Observatory, Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules, University of Bonn, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Durham University, École Polytechnique Fédérale de Lausanne, Institute for High Energy Physics, European Space Research and Technology Centre, Newcastle University, Agenzia Spaziale Italiana, Centre National d'Études Spatiales, Institute of Space Science - INFLPR Subsidiary, Consejo Superior de Investigaciones Científicas, Saint Joseph University, Instituto de Física Teórica, Institut de Recherche en Astrophysique et Planétologie, University of Chile, Universität Innsbruck, Université Paris Cité, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Astrophysique, Instrumentation et Modélisation, University of Lisbon, University of Copenhagen, European Union, Universidad Politécnica de Cartagena, Heidelberg University, University of Ferrara, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Istituto di Radioastronomia di Bologna, Osservatorio Astronomico della Regione Autonoma Valle d'Aosta, Regione Autonoma Valle d'Aosta, Université Côte d'Azur, Lagrange Laboratory, Observatoire de la Côte d’Azur, Universidade de São Paulo, CEA Paris-Saclay - Etablissement de Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Institut polytechnique de Grenoble, Sapienza University of Rome, University of Salento, Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Université Catholique de Lille, Institut d'Astrophysique de Paris, JUNIA, Fondazione ICSC Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing, Case Western Reserve University, Laboratoire Univers et Théories, Universidad de Salamanca, Ghent University, Université de Toulon, University of Manchester, University of Hertfordshire, University of Portsmouth, University of California, Irvine, University of Hawaiʻi at Mānoa, University of Hawaii System, Instituto de Física de Cantabria, Aalto University, Universidad de La Laguna, Ruhr University Bochum, University of KwaZulu-Natal, University of Turku, ARC Centre of Excellence for Dark Matter Particle Physics, Swinburne University of Technology, University of the Western Cape, Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, Centro Brasileiro de Pesquisas Físicas, Arcetri Astrophysical Observatory, University of Rome Tor Vergata, University of Zurich, Collurania Teramo Observatory, Uppsala University, The Open University, University of Cambridge, University of Nova Gorica, ETH Zurich, Institute for Particle Physics and Astrophysics, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Princeton University, Bielefeld University, University of Oulu, Space Research Organisation Netherlands, University of British Columbia
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Aeronautics and Space Administration, California Institute of Technology, European Space Agency, European Commission, Generalitat de Catalunya, Ministero dell’Istruzione, dell’Università e della Ricerca, Magyar Tudományos Akadémia, Agenzia Spaziale Italiana, National Astronomical Observatory of Japan, Agenția Spațială Română, Norsk Romsenter, Institut de Física d'Altes Energies, Jet Propulsion Laboratory, Fundação para a Ciência e a Tecnologia, Innovate UK, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Agencia Estatal de Investigación
Awards: G1849103467, G2001838499, G2064873908, G2203211782, G2452073530, G2462415295, G2676722403, G3005324705, G308504231, G3398851854, G3546882995, G4203315169, Euclid Legacy Science Advanced analysis tools, G490430286, G5195188938, Euclid Legacy Science Advanced analysis tools, G5385376234, G5922099756, G5969143191, G617794351, G69051668, G830101876, G899293041, G972786147
OpenAlex ID: W7223152566