Graph Neural Networks for Photon Searches with the Underground Muon Detector of the Pierre Auger Observatory
Ultra-high-energy photons have long been sought as tracers of the most energetic processes in the Universe. Several sources can contribute to a diffuse photon flux, including interactions of cosmic rays with Galactic matter and radiation fields, as well as more exotic scenarios such as the decay of super-heavy dark matter. Regardless of their origin, the expected flux is extremely low, making direct detection impractical and thereby requiring indirect detection by extensive ground-based detector arrays. In this contribution, we present a novel method for photon–hadron discrimination in the energy range of $50$ to $300\,\text{PeV}$ based on deep learning algorithms. Our approach relies on information from both the Surface Detector (SD) and the Underground Muon Detector (UMD) of the Pierre Auger Observatory. The SD consists of an array of water-Cherenkov detectors. It is used to measure the electromagnetic and muonic components of extensive air showers at ground level. Meanwhile, the UMD is composed of buried scintillator modules. It is sensitive to air-shower muons with energies above ${\sim}1\,\text{GeV}$, enhancing the identification of muon-poor air showers as initiated by photon primaries. Our method represents air-shower events as graphs, and consequently, the network architecture is composed of graph attention layers. We assess the performance of the method on a data subset and discuss the implications of unblinding the full current dataset, as well as the prospects of the increasing data volume expected in the coming years, particularly in terms of sensitivity to various diffuse fluxes from theoretical predictions.
Authors
- Belén Andrada
- Pedro J. Costa (ORCID: https://orcid.org/0000-0002-7476-7875)
- Zbigniew Szadkowski (ORCID: https://orcid.org/0000-0002-2690-9912)
- Bruno L. Lago (ORCID: https://orcid.org/0000-0001-9672-0499)
- Marvin Gottowik (ORCID: https://orcid.org/0000-0001-7436-389X)
- Carla Taricco (ORCID: https://orcid.org/0000-0002-0129-5539)
- Giovanni Consolati (ORCID: https://orcid.org/0000-0003-3614-245X)
- S. Petrera (ORCID: https://orcid.org/0000-0002-6029-1255)
- Varada Varma Kizakke Covilakam (ORCID: https://orcid.org/0000-0001-5278-3172)
- T. Pierog (ORCID: https://orcid.org/0000-0002-7472-8710)
- G. Sigl (ORCID: https://orcid.org/0000-0002-4396-645X)
- Mateo Fernandez
- T. Huege (ORCID: https://orcid.org/0000-0002-2783-4772)
- Marta Bianciotto (ORCID: https://orcid.org/0000-0002-9599-3214)
- Nicolas Leal
- Carmina Pérez Bertolli (ORCID: https://orcid.org/0000-0002-9790-5732)
- Carlo Salvattore Cruz Sanchez (ORCID: https://orcid.org/0009-0002-6173-0974)
- Frank Schröder (ORCID: https://orcid.org/0000-0001-8495-7210)
- A. Bueno (ORCID: https://orcid.org/0000-0002-7439-4247)
- Gustavo Medina‐Tanco (ORCID: https://orcid.org/0000-0002-3202-319X)
- A. C. Fauth (ORCID: https://orcid.org/0000-0001-7239-0288)
- Enrico Arnone (ORCID: https://orcid.org/0000-0001-6740-5051)
- Enrique Varela (ORCID: https://orcid.org/0000-0003-0715-7513)
- O. Schölten (ORCID: https://orcid.org/0000-0003-3649-1254)
- Lorenzo Cazon (ORCID: https://orcid.org/0000-0001-6748-8395)
- Pierpaolo Savina (ORCID: https://orcid.org/0000-0001-7670-554X)
- B. R. Dawson (ORCID: https://orcid.org/0000-0002-4271-3055)
- Laura Valore
- A. Haungs (ORCID: https://orcid.org/0000-0002-9638-7574)
- Harm Schoorlemmer (ORCID: https://orcid.org/0000-0002-8999-9249)
- Dalibor Nosek (ORCID: https://orcid.org/0000-0001-6219-200X)
- G. Parente (ORCID: https://orcid.org/0000-0003-2847-0461)
- Paula Gina Isar (ORCID: https://orcid.org/0000-0002-1241-584X)
- Janning Meinert (ORCID: https://orcid.org/0000-0001-7582-3456)
- Emanuele De Vito (ORCID: https://orcid.org/0000-0003-2045-7588)
- M. Roth (ORCID: https://orcid.org/0000-0003-1281-4477)
- Adila Abdul Halim (ORCID: https://orcid.org/0000-0003-1218-1737)
- Gonzalo Rodriguez Fernandez (ORCID: https://orcid.org/0000-0002-4683-230X)
- Jiří Blažek (ORCID: https://orcid.org/0000-0002-5870-8947)
- Therese Paulsen
- Adriel Bartz Mocellin
- Berenika Čermáková
- S. J. de Jong (ORCID: https://orcid.org/0000-0002-3120-3367)
- Jacco Vink (ORCID: https://orcid.org/0000-0002-4708-4219)
- V. Rizi (ORCID: https://orcid.org/0000-0002-5277-6527)
- Alexey Yushkov (ORCID: https://orcid.org/0000-0001-5107-9116)
- K. Daumiller (ORCID: https://orcid.org/0000-0002-0527-4823)
- A. Insolia (ORCID: https://orcid.org/0000-0002-9040-1566)
- Srijan Sehgal
- Lorenzo Caccianiga (ORCID: https://orcid.org/0000-0002-2245-5108)
- Darko Veberič (ORCID: https://orcid.org/0000-0003-2683-1526)
- María Isabel Micheletti (ORCID: https://orcid.org/0000-0002-1063-9938)
- A. Segreto (ORCID: https://orcid.org/0000-0001-7341-6603)
- L. Nellen (ORCID: https://orcid.org/0000-0003-1059-8731)
- Felicia Barbato (ORCID: https://orcid.org/0000-0003-0751-6731)
- Jan Pękala
- Viviana Scherini (ORCID: https://orcid.org/0000-0003-3762-4063)
- Khoa D. Nguyen (ORCID: https://orcid.org/0000-0003-0937-5354)
- Katarína Simkova (ORCID: https://orcid.org/0000-0003-2363-9846)
- R. Caruso (ORCID: https://orcid.org/0000-0003-1622-8731)
- I. Allekotte (ORCID: https://orcid.org/0000-0002-9624-3044)
- F. Sarazin (ORCID: https://orcid.org/0000-0001-5614-1986)
- Luis A. Núñez
- Chaitanya Priyadarshi (ORCID: https://orcid.org/0000-0002-9160-9617)
- M. Cristinziani (ORCID: https://orcid.org/0000-0003-3893-9171)
- E. Zas (ORCID: https://orcid.org/0000-0002-4430-8117)
- Clara Keiko Oliveira Watanabe
- Roberta Colalillo (ORCID: https://orcid.org/0000-0002-4179-9352)
- L. Miramonti (ORCID: https://orcid.org/0000-0002-2808-5363)
- F. Simon (ORCID: https://orcid.org/0000-0002-5978-0289)
- Juan Carlos D’Olivo
- F. Salamida (ORCID: https://orcid.org/0000-0002-9306-8447)
- P. Trávnı́ček (ORCID: https://orcid.org/0000-0002-1655-9584)
- Benjamin Flaggs (ORCID: https://orcid.org/0000-0002-5549-1869)
- Michael Unger
- P. Hamal (ORCID: https://orcid.org/0000-0003-3139-7234)
- A. D. Supanitsky (ORCID: https://orcid.org/0000-0002-6942-6216)
- Maximilian Straub
- R. Mussa (ORCID: https://orcid.org/0000-0002-0294-9071)
- Camilla Petrucci
- Federico Maria Mariani
- Fiona H. Ellwanger
- A. Castellina (ORCID: https://orcid.org/0000-0002-0045-2467)
- J. Vícha (ORCID: https://orcid.org/0000-0002-7945-3605)
- Jaime Álvarez-Muñiz (ORCID: https://orcid.org/0000-0002-2367-0803)
- Jose F. Valdés Galicia
- C. Hojvat (ORCID: https://orcid.org/0000-0003-3323-3129)
- Олена Ткаченко (ORCID: https://orcid.org/0000-0002-6382-6390)
- Denise Boncioli (ORCID: https://orcid.org/0000-0003-1186-9353)
- L. Chytka (ORCID: https://orcid.org/0000-0001-5741-259X)
- Martin Vacula (ORCID: https://orcid.org/0000-0003-4844-3962)
- Vladimír Novotný (ORCID: https://orcid.org/0000-0002-4319-4541)
- Miguel A. Martins (ORCID: https://orcid.org/0000-0002-7294-6204)
- F. Guarino (ORCID: https://orcid.org/0000-0003-1427-9885)
- M. Gómez Berisso (ORCID: https://orcid.org/0000-0001-5530-0180)
- M. Erdmann (ORCID: https://orcid.org/0000-0002-1653-1303)
- Jarosław Stasielak (ORCID: https://orcid.org/0000-0002-9284-7000)
- Tobias Schulz (ORCID: https://orcid.org/0000-0003-1307-778X)
- Shima Ujjani Shivashankara
- A. Letessier‐Selvon (ORCID: https://orcid.org/0000-0002-2044-3103)
- C. E. Covault (ORCID: https://orcid.org/0000-0001-5405-5371)
- Alex Tapia (ORCID: https://orcid.org/0000-0003-0585-7161)
- C. Aramo (ORCID: https://orcid.org/0000-0002-8412-3846)
- L. Nožka
- M. Palatka (ORCID: https://orcid.org/0000-0003-2061-6059)
- I. De Mitri (ORCID: https://orcid.org/0000-0002-8665-1730)
- K. S. Caballero‐Mora (ORCID: https://orcid.org/0000-0002-4042-3855)
- Antonio Franco (ORCID: https://orcid.org/0000-0001-7707-4241)
- Roberto Aloisio (ORCID: https://orcid.org/0000-0003-0161-5923)
- Bjarni Pont (ORCID: https://orcid.org/0000-0002-2578-5364)
- Simone Rossoni
- S. Buitink (ORCID: https://orcid.org/0000-0002-6177-497X)
- Juan Ammerman Yebra (ORCID: https://orcid.org/0000-0002-2059-6206)
- Violet M. Harvey (ORCID: https://orcid.org/0000-0002-6764-4789)
- Hermann-Josef Mathes (ORCID: https://orcid.org/0000-0002-0680-040X)
- P. Mantsch (ORCID: https://orcid.org/0000-0002-8382-7745)
- Rukije Uzeiroska
- Lorenzo Perrone (ORCID: https://orcid.org/0000-0002-8380-9643)
- Nicolás Martín González (ORCID: https://orcid.org/0000-0001-6566-2222)
- Nicolas San Martin
- Zuzana Svozilikova (ORCID: https://orcid.org/0000-0001-5210-0781)
- М. Бертаина (ORCID: https://orcid.org/0000-0003-1069-1397)
- M. Pech (ORCID: https://orcid.org/0000-0002-8421-0456)
- Maximilian Stadelmaier (ORCID: https://orcid.org/0000-0002-7943-6012)
- P. Assis (ORCID: https://orcid.org/0000-0001-7765-3606)
- F. Montanet (ORCID: https://orcid.org/0000-0001-9787-596X)
- Mohit Saharan
- T. Hebbeker (ORCID: https://orcid.org/0000-0002-9736-266X)
- M. Mallamaci (ORCID: https://orcid.org/0000-0003-4068-0496)
- Alena Bakalová (ORCID: https://orcid.org/0000-0003-1001-4484)
- Peter L. Biermann (ORCID: https://orcid.org/0000-0003-3948-6143)
- Jan Ebr (ORCID: https://orcid.org/0000-0001-8807-6162)
- Anthony Bwembya (ORCID: https://orcid.org/0000-0002-6995-5978)
- J. A. Chinellato (ORCID: https://orcid.org/0000-0002-1236-0789)
- Jorge Caraça-Valente
- Agustín Cobos Cerutti
- Krzysztof Pytel (ORCID: https://orcid.org/0000-0002-2937-7886)
- R. Conceição (ORCID: https://orcid.org/0000-0003-4945-5340)
- C. Bonifazi (ORCID: https://orcid.org/0000-0002-3087-3609)
- Shefali Negi (ORCID: https://orcid.org/0000-0003-0891-0829)
- Jon Paul Lundquist (ORCID: https://orcid.org/0000-0002-4245-5092)
- Edyvânia Emily Pereira Martins (ORCID: https://orcid.org/0000-0002-1167-8314)
- Fridtjof Feldbusch
- S. Vorobiov (ORCID: https://orcid.org/0000-0001-8679-3424)
- Alexander Novikov (ORCID: https://orcid.org/0000-0002-1086-7252)
- Emanuele Avocone (ORCID: https://orcid.org/0000-0003-3757-2718)
- H.O. Klages (ORCID: https://orcid.org/0000-0002-4306-021X)
- M. Prouza (ORCID: https://orcid.org/0000-0002-3238-9597)
- H. Wilczyński (ORCID: https://orcid.org/0000-0003-2652-9685)
- Antonio Ambrosone (ORCID: https://orcid.org/0000-0002-9942-1029)
- Pranav Sampathkumar
- Patricia María Hansen
- A. Gorgi (ORCID: https://orcid.org/0000-0002-8085-2304)
- F. de Palma (ORCID: https://orcid.org/0000-0001-5898-2834)
- V. de Souza (ORCID: https://orcid.org/0000-0003-0865-233X)
- Esteban Roulet (ORCID: https://orcid.org/0000-0003-1478-9260)
- S. Dasso (ORCID: https://orcid.org/0000-0002-7680-4721)
- Leo Östman
- Fabio Convenga (ORCID: https://orcid.org/0000-0002-2841-1034)
- J. Matthews (ORCID: https://orcid.org/0000-0002-1832-4420)
- Fernando Catalani (ORCID: https://orcid.org/0000-0001-9332-1476)
- Adrian Sedoski (ORCID: https://orcid.org/0000-0002-4253-3361)
- Radomir Šmída (ORCID: https://orcid.org/0000-0003-0122-1123)
- Eva Santos (ORCID: https://orcid.org/0000-0002-0474-8863)
- Joaquín de Jesús (ORCID: https://orcid.org/0000-0002-4741-1769)
- Milton Freitas
- M. Pimenta (ORCID: https://orcid.org/0000-0002-2590-0908)
- Carmelo Evoli (ORCID: https://orcid.org/0000-0002-6023-5253)
- Matías Rolf Hampel (ORCID: https://orcid.org/0000-0001-7622-4826)
- Jose A. Bellido (ORCID: https://orcid.org/0000-0002-0833-9194)
- Kathrin Bismark (ORCID: https://orcid.org/0000-0001-8637-7041)
- Adrián Rovero (ORCID: https://orcid.org/0000-0001-6979-5604)
- D. Góra (ORCID: https://orcid.org/0000-0002-4853-5974)
- J. Řídký (ORCID: https://orcid.org/0000-0001-6697-1393)
- B. Keilhauer (ORCID: https://orcid.org/0000-0003-4494-1155)
- G. Golup (ORCID: https://orcid.org/0000-0001-9471-8811)
- Stef Verpoest (ORCID: https://orcid.org/0000-0002-3031-3206)
- R. W. Clay (ORCID: https://orcid.org/0000-0002-9040-9648)
- Antonino Del Popolo (ORCID: https://orcid.org/0000-0002-9057-0239)
- Katharine Mulrey (ORCID: https://orcid.org/0000-0001-8026-8020)
- Mario Buscemi (ORCID: https://orcid.org/0000-0003-2123-5434)
- Wilson M. Namasaka
- Vincent Pelgrims (ORCID: https://orcid.org/0000-0002-5053-3847)
- Chloé Gaudu (ORCID: https://orcid.org/0000-0002-2803-4873)
- Yago Lema-Capeans
- Carmen Merx
- Mohsen Pourmohammad Shahvar
- Lukas Gülzow (ORCID: https://orcid.org/0009-0001-0620-3525)
- Shayoni Panja
- Simon Strähnz
- Sergio Cabana-Freire
- Alessandro Cermenati
- Nikolas Denner
- Beatriz de Errico (ORCID: https://orcid.org/0009-0002-4212-0708)
- João Vítor Reginatto Akim (ORCID: https://orcid.org/0000-0001-8179-9747)
- Fedor Tairli
- Alex Reuzki
- Tim Fehler
- Eric William Mayotte (ORCID: https://orcid.org/0000-0003-2618-9166)
- J. Chudoba (ORCID: https://orcid.org/0000-0002-6425-2579)
- A. De Roeck (ORCID: https://orcid.org/0000-0002-3234-6634)
- Danelise de Oliveira Franco (ORCID: https://orcid.org/0000-0002-8435-7730)
- Gioacchino Alex Anastasi (ORCID: https://orcid.org/0000-0003-0824-5283)
- José Ochoa (ORCID: https://orcid.org/0009-0001-1395-4159)
- Tiina Suomijärvi (ORCID: https://orcid.org/0000-0003-1422-258X)
- Marko Zavrtanik (ORCID: https://orcid.org/0000-0001-5606-6912)
- Alan Watson (ORCID: https://orcid.org/0000-0002-3727-6786)
- K.‐H. Kampert (ORCID: https://orcid.org/0000-0002-2805-0195)
- Jose Sanabria Gomez (ORCID: https://orcid.org/0000-0002-4217-3212)
- B. Garćıa (ORCID: https://orcid.org/0000-0003-0919-2734)
- Marcus Niechciol (ORCID: https://orcid.org/0000-0001-6823-8056)
- Leonel Morejón (ORCID: https://orcid.org/0000-0003-1494-2624)
- Juan Pallotta (ORCID: https://orcid.org/0000-0003-4846-8748)
- Igor Vaiman (ORCID: https://orcid.org/0000-0002-8255-3631)
- Giorgio Matthiae
- Markus Risse
- Alejandro Almela
- Andrej Filipčič
- Humberto Ibarguen Salazar
- Rita Cassia dos Anjos
- Jörg R. Hörandel
- Germano Guedes
- Analisa Mariazzi
- Andreas Weindl
- Juan Manuel Gonzalez (ORCID: https://orcid.org/0009-0006-7524-8635)
- Sergio J Sciutto
- Ezequiel Rodriguez
- Luca Deval
- Peter Mazur
- Stanislav Michal
- Johannes Blümer
- Jelena Köhler
- Danilo Zavrtanik (ORCID: https://orcid.org/0000-0002-4596-1521)
- Manuel Platino
- Fernando Gollan
- Luis Miguel Domingues Mendes
- Edivaldo Moura Santos
- Lukáš Vaclavek
- Isabelle Lhenry-Yvon
- Qader Dorosti (ORCID: https://orcid.org/0000-0001-9711-0609)
- Italo Epicoco
- Alberto Etchegoyen
- Bernardo Tomé
- Sara Martinelli
- Charles Timmermans
- Paul Filip
- Marco Aglietta
- Carlos J. Todero Peixoto (ORCID: https://orcid.org/0000-0003-3669-8212)
- Josina Schulte
- Toshihiro Fujii
- Luan Bonneau Arbeletche (ORCID: https://orcid.org/0000-0002-3087-3609)
- Thomas Fitoussi
- Adriana Vásquez-Ramírez
- Felix Riehn
- Margita Kubátová
- Melanie Weitz (ORCID: https://orcid.org/0009-0001-9010-9610)
- Primo F. Gómez Vitale
- Rogerio M. de Almeida
- Corinne Berat
- Glennys R. Farrar
- Jonathan Biteau
- Martina Boháčová
- Niklas Langner
- R. Sarmento (ORCID: https://orcid.org/0000-0002-5018-5467)
- Pavel Horváth (ORCID: https://orcid.org/0000-0002-6710-5339)
- G. Marsella (ORCID: https://orcid.org/0000-0002-3152-8874)
- Nataliia Borodai (ORCID: https://orcid.org/0000-0003-1864-937X)
- Kévin Almeida Cheminant (ORCID: https://orcid.org/0000-0001-6352-5339)
- Martin Schimassek (ORCID: https://orcid.org/0000-0003-4295-7719)
- H. Schieler (ORCID: https://orcid.org/0000-0002-2637-4778)
- Petr Tobiska (ORCID: https://orcid.org/0000-0003-4017-2475)
- Lawrence Wiencke
- Jorge Rubén Rodriguez Rojo
- Daniele Martello
- Florian Lukas Briechle
- Samo Stanič (ORCID: https://orcid.org/0000-0003-3344-8381)
- Marcelo Augusto Leigui de Oliveira
- Ioana Codrina Maris
- Marcos Cerda
- Valerio Verzi
- Michael Schimp
- Brian Wundheiler
- Ralph Engel
- Piera Luisa Ghia
- P. Gabriel Brichetto Orchera
- Gaetano Salina
- Ruben Squartini
- Gabriela Nicora
- Achille Nucita
- Petr Janecek
- Diego Correia dos Santos
- Dave Nitz
- Brian Fick
- Silvia Mollerach
- Alan Fuster
- Virginia Binet
- Jeffrey Brack
- Olivier Deligny
- Marina Scornavacche
- Alexander Menshikov
- Dusan Mandat
- C. Dobrigkeit
- Armando di Matteo
- P. Abreu
- Indira D. Vergara Quispe
- Ricardo Sato
- Cainã Oliveira
- Max Büsken
- Steffen Hahn
- A. Săftoiu (ORCID: https://orcid.org/0000-0002-7903-6510)
- L. Lopes (ORCID: https://orcid.org/0000-0001-8571-0033)
- Patrick Stassi (ORCID: https://orcid.org/0000-0001-5584-8410)
- Abha Khakurdikar (ORCID: https://orcid.org/0000-0002-4857-5255)
- Sonja Mayotte (ORCID: https://orcid.org/0000-0001-8957-8033)
- F. Sánchez (ORCID: https://orcid.org/0000-0002-6861-6261)
- Rodrigo Pelayo
- Luis A. Anchordoqui (ORCID: https://orcid.org/0000-0003-1463-7136)
- Fabian Gobbi
- Baobiao Yue
- Paolo Privitera
- Lorenzo Apollonio (ORCID: https://orcid.org/0009-0008-5625-5893)
- Teresa Bister
- Miroslav Hrabovský
- Joao dos Anjos
- David Schmidt
- Diego Melo
- Vlastimil Jílek (ORCID: https://orcid.org/0000-0001-5774-7285)
- Veronika Vašíčková
- Paul Sommers
- Alexandra Fernandes (ORCID: https://orcid.org/0000-0002-9187-4007)
- Ugo GIACCARI
- J. Rautenberg
- Norbert Kunka
- Juan Carlos Arteaga Velázquez
- Luiz Augusto Pereira
- Heino Falcke
- Cristina Galea
- Matteo Conte
- Jaime de Oliveira
- Petr Schovanek
- Jannis Pawlowsky
- Juan Manuel Figueira
- Federico Campuzano
- Frederik Krieger
- Gael Flores Avila (ORCID: https://orcid.org/0000-0001-8375-6492)
- Sven Querchfeld
- Matthias Kleifges
- Sofia Andringa
- Gabriella Cataldi
- Luciana Andrade Dourado
- Tomáš Fodran (ORCID: https://orcid.org/0009-0000-9529-0853)
- Matias Jorge Tueros (ORCID: https://orcid.org/0000-0003-1570-1419)
- D. Ravignani (ORCID: https://orcid.org/0000-0001-7410-8522)
- Megha Mogarkar
- Jhansi Bhavani Vuta
- Eric-Teunis de Boone
- Mohamed Ismaiel
- Karolina Syrokvas
- Matteo Tambone
- Pim van Dillen
Publication Details
- Published
- 2025-09-24
- DOI
- https://doi.org/10.22323/1.501.0825
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- U.S. Department of Energy
- Grainger Foundation
- Strong
- Ministerul Cercetării, Inovării şi Digitalizării
- European Commission
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Grantová Agentura České Republiky
- Bundesministerium für Bildung und Forschung
- Fonds De La Recherche Scientifique - FNRS
- Consejo Nacional de Investigaciones Científicas y Técnicas
- Fonds Wetenschappelijk Onderzoek
- Consejo Nacional de Ciencia y Tecnología
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Javna Agencija za Raziskovalno Dejavnost RS
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Centre National de la Recherche Scientifique
- Financiadora de Estudos e Projetos
- Ministerio de Ciencia e Innovación
- Istituto Nazionale di Astrofisica
- Universidad Nacional Autónoma de México
- Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii
- Xunta de Galicia
- Junta de Andalucía
- Ministério da Ciência, Tecnologia, Inovações e Comunicações
- Vlaamse regering
- Istituto Nazionale di Fisica Nucleare
- Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen
- Helmholtz Alliance for Astroparticle Physics
- Ministero dell'Università e della Ricerca
- Fundação para a Ciência e a Tecnologia
- Agencia Nacional de Promoción Científica y Tecnológica
- Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
- European Regional Development Fund
- Agencia Estatal de Investigación
- Institut National de Physique Nucléaire et de Physique des Particules