Constraints on the VHE counterpart of two binary black hole mergers observed by the MAGIC and CTAO LST-1 telescopes

Bibliographic Details
Title: Constraints on the VHE counterpart of two binary black hole mergers observed by the MAGIC and CTAO LST-1 telescopes
Authors: Abe, K., Abe, S., Abhir, J., Abhishek, A., Acciari, V. A., Acero, F., Aguasca-Cabot, A., Agudo, I., Albanese, I., Ambrosino, D., Ambrosino, F., Aniello, T., Ansoldi, S., Antonelli, L. A., Aramo, C., Arauner, C., Arbet-Engels, A., Arcaro, C., Arnesen, T. T. H., Aubert, P., Babić, A., Bakshi, C., Baktash, A., Balbo, M., Bamba, A., Baquero-Larriva, A., Barres-de-Almeida, U., Barrio, J. A., Barrios-Jiménez, L., Batkovic, I., Baxter, J., Becerra-González, J., Bednarek, W., Bernardini, E., Bernete, J., Berti, A., Besenrieder, J., Bigongiari, C., Biland, A., Bissaldi, E., Blanch, O., Bošnjak, Ž., Bonnoli, G., Bordas, P., Breton-Zaourat, L., Briscioli, A., Bronzini, E., Brunelli, G., Buces, J., Bulgarelli, A., Burelli, I., Burmistrov, L., Campa, C., Campoy-Ordaz, A., Cardillo, M., Caroff, S., Carosi, A., Carosi, R., Carraro, R., Carretero-Castrillo, M., Cassol, F., Castro-Tirado, A. J., Cerasole, D., Ceribella, G., Cerviño-Cortínez, A., Chai, Y., Chiavassa, A., Chilingarian, A., Chon, G., Chytka, L., Cicciari, G. M., Santos, A. Cifuentes, Contreras, J. L., Cortina, J., Costantini, H., Covino, S., Croisonnier, M., D'Amico, G., Da-Vela, P., Dalchenko, M., Dazzi, F., De-Angelis, A., de-Bony-de-Lavergne, M., De-Lotto, B., de-Menezes, R., De-Palma, G., de-Souza, V., Del-Burgo, R., Del-Peral, L., Delfino, M., Mendez, C. Delgado, Delgado-Mengual, J., della-Volpe, D., Di-Bella, L., Di-Domenico, C., Di-Piano, A., Di-Pierro, F., Di-Tria, R., Di-Venere, L., Díaz, C., Dinesh, A., Espineira, E. Do Souto, Dominis-Prester, D., Donini, A., Dorner, D., Doro, M., Eisenberger, L., Elsässer, D., Emery, G., Escudero, J., Farina, L., Feligioni, L., Ferrarotto, F., Fiasson, A., Foffano, L., Font, L., Frías-García-Lago, F., Fukazawa, Y., Gallozzi, S., Garcia-Garcia, J., López, R. J. García, Garcia-Soto, S., Gasparrini, D., Gasparyan, S., Gaug, M., Paiva, J. G. Giesbrecht, Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Gradetzke, T., Grau, R., Green, J., Grolleron, G., Gunji, S., Günther, P., Hadasch, D., Hahn, A., Hashizume, M., -Hassan, T., Hayashi, K., Heckmann, L., Heller, M., Herrera-Llorente, J., Hiroshima, N., Hoffmann, D., Horns, D., Houles, J., Hrupec, D., Inada, T., Inoue, S., Ioka, K., Iori, M., Israyelyan, D., Iuliano, A., Jahanvi, J., Jiménez-Martínez, I., Jiménez-Quiles, J., Jorge-Rodrigo, I., Jurysek, J., Kagaya, M., Kankkunen, S., Karas, V., Katagiri, H., Kayanoki, T., Kerszberg, D., Khachatryan, M., Kluge, G. W., Kobayashi, Y., Kohri, K., Konrad, J., Kornecki, P., Kouch, P. M., Kubo, H., Kushida, J., Lacave, B., Láinez, M., Lamastra, A., Lemoigne, L., Lindfors, E., Linhoff, M., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Lorini, A., Lozano-Bahilo, J., Lucarelli, F., Luciani, H., Lulić, L., Luque-Escamilla, P. L., Majumdar, P., Makariev, M., Mallamaci, M., Mandat, D., Maneva, G., Manganaro, M., Mangano, S., Maniadakis, D. K., Manicò, G., Mannheim, K., Marini, F., Mariotti, M., Marsella, G., Martí, J., Martin, D., Martínez, G., Martínez, M., Martinez, O., Maru\v{s, P., evec, Massa, M., Mazin, D., Menchiari, S., Méndez-Gallego, J., Menon, S., Mestre-Guillen, E., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., Mizuno, M., Molero-Gonzalez, M., Molina, E., Mondal, H. A., Montaruli, T., Moralejo, A., Morales-Sanchez-De-Lozada, S., Morita, K., -Morselli, A., Moya, V., Mrakovčić, K., Müller, A. L., Muraishi, H., Nagata, T., Nagataki, S., Nakamori, T., Nanci, C., Negro, A., Neronov, A., Neustroev, V., Nieto-Castaño, D., Nievas-Rosillo, M., Nigro, C., Nikolić, L., Nilsson, K., Noda, K., Novotny, V., Nozaki, S., Ohishi, M., Okumura, A., Orito, R., Orsini, L., Otero-Santos, J., Ottanelli, P., Paiano, S., Palatiello, M., Panebianco, G., Paneque, D., Paoletti, R., Paredes, J. M., Pech, M., Pecimotika, M., Peresano, M., Perrotta, F., Persic, M., Pfeifle, F., Pietropaolo, E., Pihet, M., Pirola, G., Plard, C., Podobnik, F., Polo, M., Pozo-Gonzaléz, C., Moroni, P. G. Prada, Prandini, E., Rainò, S., Rando, R., Rhode, W., Ribó, M., Rico, J., Rizi, V., Rodriguez-Fernandez, G., Roy, A., Ruiz-Velasco, E., Sahakyan, N., Saito, T., Sakurai, S., Sanchez, D. A., Sano, H., Santos-Moura, E., Šarić, T., Sato, Y., Saturni, F. G., Savchenko, V., Schiavone, F., Schmitz, K., Schussler, F., Schweizer, T., Seglar-Arroyo, M., Sharma, U., Siegert, T., Silvestri, G., Simongini, A., Sitarek, J., Sliusar, V., Sobczynska, D., Sofia, I., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Sunny, A., Tajima, H., Takahashi, M., Takeishi, R., Tanaka, S. J., Barberà, J. Tartera, Tavernier, T., Temnikov, P., Terada, Y., Terauchi, K., Terzic, T., Teshima, M., Tluczykont, M., Tomura, T., Torres, D. F., Tramonti, F., Travnicek, P., Tripodo, G., Tutone, A., Ubach, S., Vacula, M., Vázquez-Acosta, M., Ventura, S., Verna, G., Viale, I., Viana, A., Vigliano, A., Vigorito, C. F., Visentin, E., Vitale, V., Vorbrugg, M., Voutsinas, G., Vovk, I., Vuillaume, T., Walter, R., Walther, C., Wan, L., Witczak, P., Wersig, F., Yamamoto, T., Yamazaki, R., Yao, Y., Yeung, P. K. H., Yoshida, T., Yoshikoshi, T., Zhang, W.
Source: Publications of the Astronomical Society of the Pacific, Volume 138, Number 8, August 2026
Publication Year: 2026
Subject Terms: High Energy Astrophysical Phenomena
Description: We present very-high-energy gamma-ray observations of two binary black hole merger candidates, GW240615_113620 and GW241125_010116, performed with the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes and the first Large-Sized Telescope of the Cherenkov Telescope Array Observatory's (CTAO LST-1). GW240615_113620 was the best localized event of the fourth observing run of the LIGO-Virgo-KAGRA gravitational waves interferometers. GW241125_010116 was temporally and spatially coincident with a sub-threshold short-duration burst detected with the Swift-Burst Alert Telescope (BAT), the Swift-X-Ray Telescope (XRT) and the Einstein Probe Follow-up X-ray Telescope (FXT). We observed the two events in stereoscopic mode, taking advantage of the improved sensitivity of joint MAGIC+LST-1 observations. No detection was achieved in the GeV-TeV gamma-ray band for any of the two sources. The unfavourable observing conditions of both events posed a challenge for a standard analysis and therefore a non standard analysis was necessary for both objects. Owing to the small localization area and the association with a GRB-like burst respectively, these events represented an unprecedented opportunity to study in details the electromagnetic emission from binary black holes merger events and, in particular, we discussed two theoretical models that predict a detectable gamma-ray emission and the possible future applications.
Published version. Corresponding authors: Andrea Simongini, Juan Jiménez Quiles, Mario Pecimotika, Monica Seglar-Arroyo
Document Type: Working Paper
DOI: 10.48550/arXiv.2607.19972
Access URL: https://arxiv.org/abs/2607.19972
Accession Number: edsarx.2607.19972
Database: arXiv
Description
DOI:10.48550/arXiv.2607.19972