Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data
Hidetarô Abe, K. Abe, S. Abe, V. A. Acciari, Arnau Aguasca-Cabot, I. Agudo, Nuria Álvarez Crespo, T. Aniello, S. Ansoldi, L. A. Antonelli, C. Aramo, A. Arbet Engels, Cornelia Arcaro, Manuel Artero, K. Asano, P. Aubert, Dominik Baack, Ana Babić, Ali Baktash, Aya Bamba, Andrés Baquero, L. Baroncelli, U. Barres de Almeida, J. A. Barrio, I. Batkovi'c, J. Baxter, Jordi Gonzàlez, W. Bednarek, E. Bernardini, M.I Bernardos, J. Bernete Medrano, A. Berti, J. Besenrieder, Pooja Bhattacharjee, Noah Biederbeck, C. Bigongiari, A. Biland, E. Bissaldi, O. Blanch, G. Bonnoli, P. Bordas, Ž. Bošnjak, A. Bulgarelli, Irene Burelli, L. Burmistrov, Mario Buscemi, G. Busetto, A. Campoy Ordaz, M Cardillo, Sami Caroff, A. Carosi, R. Carosi, Marie-Sophie Carrasco, M. Carretero-Castrillo, F. Cassol, A.J. Castro-Tirado, D. Cauz, Davide Cerasole, G. Ceribella, Yating Chai, Katherine C. Cheng, A. Chiavassa, M. Chikawa, L. Chytka, A. Cifuentes, S. Cikota, E. Colombo, J. L. Contreras, A. Cornelia, J. Cortina, H. Costantini, S. Covino, Giacomo D’Amico, V. D’Elia, P. Da Vela, M. Dalchenko, F. Dazzi, A. De Angelis, Mathieu de Bony de Lavergne, B. De Lotto, Mario de Lucia, Raniere de Menezes, L. del Peral, A. Del Popolo, Guillaume Deleglise, M. Delfino, C. Delgado Mendez, J. Delgado Mengual, D. della Volpe, Michael Dellaiera, Davide Depaoli, A. De Angelis, Ambra Di Piano, F. Di Pierro, Antonio Di Pilato, R. Di Tria, L. Di Venere, Rune Michael Dominik, D. Dominis Prester, Alice Donini
Abstract
Aims. Large-Sized Telescope 1 (LST-1), the prototype for the Large-Sized Telescope at the upcoming Cherenkov Telescope Array Observatory, is concluding its commissioning phase at the Observatorio del Roque de los Muchachos on the island of La Palma. The proximity of LST-1 to the two MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes makes it possible to carry out observations of the same gamma-ray events with both systems. Methods. We describe the joint LST-1+MAGIC analysis pipeline and used simultaneous Crab Nebula observations and Monte Carlo simulations to assess the performance of the three-telescope system. The addition of the LST-1 telescope allows for the recovery of events in which one of the MAGIC images is too dim to survive analysis quality cuts. Results. Thanks to the resulting increase in the collection area and stronger background rejection, we found a significant improvement in sensitivity, allowing for the detection of 30% weaker fluxes in the energy range between 200 GeV and 3 TeV. The spectrum of the Crab Nebula, reconstructed in the energy range between ~60 GeV and ~10 TeV, is in agreement with previous measurements.