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    Aglietta, M.; Almeida Cheminant, K.; Alvarez-Muñiz, J.; Ammerman Yebra, J.; Arteaga Velázquez, J. C.; Avocone, E.; Bertaina, M. E.; Bhatta, G.; Bismark, K.; Bister, T.; Bleve, C.; Bonifazi, C.; Borodai, N.; Buchholz, P.; Buscemi, M.; Caccianiga, L.; Caracas, I.; Caruso, R.; Castellina, A.; Catalani, F.; Cazon, L.; Condorelli, A.; Conte, M.; Contreras, F.; de Jong, S. J.; de Oliveira Franco, D.; Del Popolo, A.; Deligny, O.; Farrar, G.; Fuster, A.; Galea, C.; Galelli, C.; Gemmeke, H.; Gobbi, F.; Gómez Vitale, P. F.; González, N.; Goos, I.; Gorgi, A.; Gottowik, M.; Hahn, S.; Hampel, M. R.; Hebbeker, T.; Heck, D.; Hojvat, C.; Hrabovský, M.; Huege, T.; Isar, P. G.; Janecek, P.; Kizakke Covilakam, V. V.; Kleinfeller, J.; López, R.; Majercakova, M.; Mandat, D.; Manshanden, J.; Mariş, I. C.; Martinelli, S.; Mathes, H. J.; Mazur, P. O.; Meinert, J.; Micheletti, M. I.; Nasr-Esfahani, A.; Nicora, G.; Nožka, L.; Nucita, A.; Palatka, M.; Parra, A.; Pech, M.; Pereira, L. A. S.; Pereira Martins, E. E.; Pierog, T.; Prouza, M.; Puyleart, A.; Rautenberg, J.; Ravignani, D.; Reininghaus, M.; Roth, M.; Roulet, E.; Salamida, F.; Schlüter, F.; Schmidt, D.; Schovánek, P.; Scornavacche, M.; Sehgal, S.; Smau, R.; Squartini, R.; Stadelmaier, M.; Stasielak, J.; Streich, A.; Suomijärvi, T.; Tapia, A.; Taricco, C.; Timmermans, C.; Travaini, A.; Vaclavek, L.; Vásquez-Ramírez, A.; Veberič, D.; Ventura, C.; Vorobiov, S.; Wiencke, L.; Yushkov, A.

    The Astrophysical journal, 07/2023, Letnik: 952, Številka: 1
    Journal Article

    Abstract A search for time-directional coincidences of ultra-high-energy (UHE) photons above 10 EeV with gravitational wave (GW) events from the LIGO/Virgo runs O1 to O3 is conducted with the Pierre Auger Observatory. Due to the distinctive properties of photon interactions and to the background expected from hadronic showers, a subset of the most interesting GW events is selected based on their localization quality and distance. Time periods of 1000 s around and 1 day after the GW events are analyzed. No coincidences are observed. Upper limits on the UHE photon fluence from a GW event are derived that are typically at ∼7 MeV cm −2 (time period 1000 s) and ∼35 MeV cm −2 (time period 1 day). Due to the proximity of the binary neutron star merger GW170817, the energy of the source transferred into UHE photons above 40 EeV is constrained to be less than 20% of its total GW energy. These are the first limits on UHE photons from GW sources.