Euclid Quick Data Release (Q1). The Strong Lensing Discovery Engine F -- Bright and low-redshift strong lenses
Abstract
We present 72 additional galaxy-galaxy strong lenses that complement the sample discovered in the Euclid Quick Release 1 data (63.1 deg^2) of the Strong Lens Discovery Engine (SLDE) papers A-E. It is shown that previous pre-selection of potential lenses, which excluded objects from the Gaia catalogue, led to missing several bright and low-redshift strong lenses, adding more than 10% new strong lens candidates compared to the previous search. In total, the catalogue includes 38 "grade A" (confident) and 34 "grade B" (probable) candidates. These lenses are identified through a combination of two independent searches for bright nearby objects: one based on machine-learning models followed by expert visual inspection, and the other based solely on expert visual inspection, targeting objects not included in the initial machine-learning selection (a limitation identified only after extensive visual inspection). With these additional strong lens candidates, we augment the expected number of high-confidence candidates in the Euclid Wide Survey from previous forecasts to 120000. Detailed semi-automated lens modelling confirms at least 41 systems out of 72, a fraction consistent with that found in SLDE A (315 out of 488). These include: multiple edge-on disc lenses; sources with arcs near the lens centre; "red sources"; and an edge-on disk galaxy lensing a galaxy merger, producing two sets of lensed features, an Einstein ring and a doubly imaged component. The median redshift of these systems is z ~ 0.3 lower than that of the SLDE A sample.
Cite
@article{arxiv.2603.28580,
title = {Euclid Quick Data Release (Q1). The Strong Lensing Discovery Engine F -- Bright and low-redshift strong lenses},
author = {Euclid Collaboration and L. R. Ecker and M. Fabricius and S. Seitz and R. Saglia and N. E. P. Lines and P. Holloway and T. Li and A. Verma and F. Balzer and Q. Jin and A. Manjón-García and S. H. Vincken and J. Wilde and J. A. Acevedo Barroso and J. W. Nightingale and K. Rojas and S. Schuldt and M. Walmsley and T. E. Collett and G. Despali and A. Sonnenfeld and C. Tortora and R. B. Metcalf and R. Bender and C. Saulder and E. Baeten and C. Cornen and D. Delley and K. Finner and A. Galan and R. Gavazzi and L. C. Johnson and L. Leuzzi and C. Macmillan and P. J. Marshall and M. Millon and A. More and L. A. Moustakas and J. Pearson and J. -N. Pippert and C. Scarlata and D. Sluse and C. Spiniello and T. T. Thai and L. Ulivi and Han. Wang and X. Xu and F. Courbin and M. Meneghetti and N. Aghanim and B. Altieri and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and A. Biviano and E. Branchini and M. Brescia and S. Camera and G. Cañas-Herrera and V. Capobianco and C. Carbone and J. Carretero and S. Casas and M. Castellano and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and A. Costille and H. M. Courtois and M. Cropper and A. Da Silva and H. Degaudenzi and G. De Lucia and C. Dolding and H. Dole and F. Dubath and X. Dupac and S. Dusini and A. Ealet and S. Escoffier and M. Farina and R. Farinelli and F. Faustini and S. Ferriol and F. Finelli and P. Fosalba and S. Fotopoulou and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and K. George and W. Gillard and B. Gillis and C. Giocoli and P. Gómez-Alvarez and J. Gracia-Carpio and A. Grazian and F. Grupp and L. Guzzo and S. V. H. Haugan and H. Hoekstra and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and A. M. C. Le Brun and D. Le Mignant and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and G. Mainetti and D. Maino and E. Maiorano and O. Mansutti and S. Marcin and O. Marggraf and M. Martinelli and N. Martinet and F. Marulli and R. J. Massey and E. Medinaceli and S. Mei and Y. Mellier and E. Merlin and G. Meylan and A. Mora and M. Moresco and L. Moscardini and R. Nakajima and C. Neissner and R. C. Nichol and S. -M. Niemi and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. J. Percival and V. Pettorino and S. Pires and G. Polenta and M. Poncet and L. Pozzetti and F. Raison and A. Renzi and J. Rhodes and G. Riccio and H. -W. Rix and E. Romelli and M. Roncarelli and E. Rossetti and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and P. Schneider and T. Schrabback and A. Secroun and G. Seidel and S. Serrano and P. Simon and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and H. I. Teplitz and I. Tereno and N. Tessore and S. Toft and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and Y. Wang and J. Weller and A. Zacchei and G. Zamorani and F. M. Zerbi and E. Zucca and M. Ballardini and M. Bolzonella and E. Bozzo and C. Burigana and R. Cabanac and A. Cappi and T. Castro and B. Clément and J. A. Escartin Vigo and L. Gabarra and J. García-Bellido and V. Gautard and S. Hemmati and M. Huertas-Company and J. Macias-Perez and R. Maoli and J. Martín-Fleitas and M. Maturi and N. Mauri and P. Monaco and A. Pezzotta and M. Pöntinen and C. Porciani and I. Risso and V. Scottez and M. Sereno and M. Tenti and M. Tucci and M. Viel and M. Wiesmann and Y. Akrami and I. T. Andika and G. Angora and S. Anselmi and M. Archidiacono and F. Atrio-Barandela and L. Bazzanini and P. Bergamini and D. Bertacca and M. Bethermin and F. Beutler and A. Blanchard and L. Blot and M. Bonici and S. Borgani and M. L. Brown and S. Bruton and A. Calabro and B. Camacho Quevedo and F. Caro and C. S. Carvalho and Y. Charles and F. Cogato and S. Conseil and A. R. Cooray and O. Cucciati and S. Davini and F. De Paolis and G. Desprez and A. Díaz-Sánchez and S. Di Domizio and J. M. Diego and P. -A. Duc and V. Duret and M. Y. Elkhashab and A. Enia and Y. Fang and A. Finoguenov and A. Fontana and A. Franco and K. Ganga and T. Gasparetto and E. Gaztanaga and F. Giacomini and F. Gianotti and G. Gozaliasl and A. Gruppuso and M. Guidi and C. M. Gutierrez and A. Hall and H. Hildebrandt and J. Hjorth and L. K. Hunt and J. J. E. Kajava and Y. Kang and V. Kansal and D. Karagiannis and K. Kiiveri and J. Kim and C. C. Kirkpatrick and S. Kruk and M. Lattanzi and L. Legrand and F. Lepori and G. Leroy and G. F. Lesci and J. Lesgourgues and T. I. Liaudat and A. Loureiro and M. Magliocchetti and F. Mannucci and C. J. A. P. Martins and L. Maurin and M. Miluzio and C. Moretti and G. Morgante and K. Naidoo and P. Natoli and A. Navarro-Alsina and S. Nesseris and D. Paoletti and F. Passalacqua and K. Paterson and L. Patrizii and A. Pisani and D. Potter and G. W. Pratt and S. Quai and M. Radovich and G. Rodighiero and W. Roster and S. Sacquegna and M. Sahlén and D. B. Sanders and E. Sarpa and A. Schneider and D. Sciotti and E. Sellentin and L. C. Smith and J. G. Sorce and K. Tanidis and C. Tao and F. Tarsitano and G. Testera and R. Teyssier and S. Tosi and A. Troja and A. Venhola and D. Vergani and G. Vernardos and G. Verza and P. Vielzeuf and S. Vinciguerra and N. A. Walton and A. H. Wright},
journal= {arXiv preprint arXiv:2603.28580},
year = {2026}
}