Observations of the Crab Nebula and Pulsar with the Large-sized Telescope Prototype of the Cherenkov Telescope Array
Journal
Date Issued
2023
Author(s)
Abe, H.
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Abe, K.
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Abe, S.
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Aguasca-Cabot, A.
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Agudo, I.
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Alvarez Crespo, N.
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Aramo, C.
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Arbet-Engels, A.
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Arcaro, C.
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Artero, M.
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Asano, K.
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Aubert, P.
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Baktash, A.
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Bamba, A.
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Baquero Larriva, A.
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Barres de Almeida, U.
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Barrio, J. A.
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Batkovic, I.
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Baxter, J.
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Becerra González, J.
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Bernardini, E.
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Bernardos, M. I.
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Bernete Medrano, J.
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Berti, A.
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Bhattacharjee, P.
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Biederbeck, N.
•
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Bissaldi, E.
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Blanch, O.
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Bordas, P.
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Borghese, A.
•
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Burelli, I.
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Buscemi, M.
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Caroff, S.
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Cassol, F.
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Cauz, D.
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Ceribella, G.
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Chai, Y.
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Cheng, K.
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Chiavassa, A.
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Chikawa, M.
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Chytka, L.
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Cifuentes, A.
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Contreras, J. L.
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Cortina, J.
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Costantini, H.
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D'Amico, G.
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Dalchenko, M.
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De Angelis, A.
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de Bony de Lavergne, M.
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De Lotto, B.
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de Menezes, R.
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Deleglise, G.
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Delgado, C.
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Delgado Mengual, J.
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della Volpe, D.
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Dellaiera, M.
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Depaoli, D.
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Di Piano, A.
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Di Pierro, F.
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Di Tria, R.
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Di Venere, L.
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Díaz, C.
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Dominik, R. M.
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Dominis Prester, D.
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Donini, A.
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Dorner, D.
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Doro, M.
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Elsässer, D.
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Emery, G.
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Escudero, J.
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Fallah Ramazani, V.
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Ferrara, G.
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Ferrarotto, F.
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Fiasson, A.
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Freixas Coromina, L.
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Fröse, S.
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Fukami, S.
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Fukazawa, Y.
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Garcia, E.
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Garcia López, R.
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Gasbarra, C.
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Gasparrini, D.
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Geyer, F.
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Giesbrecht Paiva, J.
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Giglietto, N.
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Giordano, F.
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Gliwny, P.
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Godinovic, N.
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Grau, R.
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Green, D.
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Gunji, S.
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Hackfeld, J.
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Hadasch, D.
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Hahn, A.
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Hashiyama, K.
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Hassan, T.
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Hayashi, K.
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Heckmann, L.
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Heller, M.
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Herrera Llorente, J.
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Hirotani, K.
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Hoffmann, D.
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Horns, D.
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Houles, J.
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Hrabovsky, M.
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Hrupec, D.
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Hui, D.
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Hütten, M.
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Iarlori, M.
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Imazawa, R.
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Inada, T.
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Inome, Y.
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Ioka, K.
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Iori, M.
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Ishio, K.
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Iwamura, Y.
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Jacquemont, M.
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Jimenez Martinez, I.
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Jurysek, J.
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Kagaya, M.
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Karas, V.
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Katagiri, H.
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Kataoka, J.
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Kerszberg, D.
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Kobayashi, Y.
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Kong, A.
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Kubo, H.
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Kushida, J.
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Lainez, M.
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Lamanna, G.
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Le Flour, T.
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Linhoff, M.
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Longo, F.
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López-Coto, R.
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López-Moya, M.
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López-Oramas, A.
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Loporchio, S.
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Lorini, A.
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Luque-Escamilla, P. L.
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Majumdar, P.
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Makariev, M.
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Mandat, D.
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Manganaro, M.
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Manicò, G.
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Mannheim, K.
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Mariotti, M.
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Marquez, P.
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Marsella, G.
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Martí, J.
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Martinez, O.
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Martínez, G.
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Martínez, M.
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Marusevec, P.
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Mas-Aguilar, A.
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Maurin, G.
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Mazin, D.
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Mestre Guillen, E.
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Micanovic, S.
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Miceli, D.
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Miener, T.
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Miranda, J. M.
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Mirzoyan, R.
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Mizuno, T.
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Molero Gonzalez, M.
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Molina, E.
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Montaruli, T.
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Monteiro, I.
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Moralejo, A.
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Morcuende, D.
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Morselli, A.
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Mrakovcic, K.
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Murase, K.
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Nagai, A.
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Nagataki, S.
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Nakamori, T.
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Nickel, L.
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Nievas, M.
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Nishijima, K.
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Noda, K.
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Nosek, D.
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Nozaki, S.
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Ohishi, M.
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Ohtani, Y.
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Oka, T.
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Okazaki, N.
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Okumura, A.
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Orito, R.
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Otero-Santos, J.
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Palatiello, M.
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Paneque, D.
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Pantaleo, F. R.
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Paoletti, R.
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Paredes, J. M.
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Pech, M.
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Pecimotika, M.
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Peresano, M.
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Pérez, A.
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Pietropaolo, E.
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Pirola, G.
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Plard, C.
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Podobnik, F.
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Poireau, V.
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Polo, M.
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Pons, E.
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Prast, J.
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Priyadarshi, C.
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Prouza, M.
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Rando, R.
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Rhode, W.
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Ribó, M.
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Rizi, V.
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Rodriguez Fernandez, G.
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Ruiz, J. E.
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Saito, T.
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Sakurai, S.
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Sanchez, D. A.
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Šarić, T.
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Sato, Y.
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Schleicher, B.
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Schmuckermaier, F.
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Schubert, J. L.
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Schussler, F.
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Schweizer, T.
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Seglar Arroyo, M.
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Silvia, R.
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Sitarek, J.
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Sliusar, V.
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Spolon, A.
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Strišković, J.
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Strzys, M.
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Suda, Y.
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Sunada, Y.
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Tajima, H.
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Takahashi, H.
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Takahashi, M.
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Takata, J.
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Takeishi, R.
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Tam, P. H. T.
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Tanaka, S. J.
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Tateishi, D.
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Tejedor, L. A.
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Temnikov, P.
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Terada, Y.
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Terauchi, K.
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Terzic, T.
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Teshima, M.
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Tluczykont, M.
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Tokanai, F.
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Torres, D. F.
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Travnicek, P.
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Truzzi, S.
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Uhlrich, G.
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Vacula, M.
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van Scherpenberg, J.
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Vázquez Acosta, M.
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Verguilov, V.
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Viale, I.
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Vigliano, A.
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Vigorito, C. F.
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Vitale, V.
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Voutsinas, G.
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Vovk, I.
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Vuillaume, T.
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Walter, R.
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Will, M.
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Yamamoto, T.
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Yamazaki, R.
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Yoshida, T.
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Yoshikoshi, T.
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Zywucka, N.
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Bernlöhr, K.
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Gueta, O.
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Kosack, K.
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Maier, G.
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Watson, J.
Abstract
The Cherenkov Telescope Array (CTA) is a next-generation ground-based observatory for gamma-ray astronomy at very high energies. The Large-Sized Telescope prototype (LST-1) is located at the CTA-North site, on the Canary Island of La Palma. LSTs are designed to provide optimal performance in the lowest part of the energy range covered by CTA, down to ≃20 GeV. LST-1 started performing astronomical observations in 2019 November, during its commissioning phase, and it has been taking data ever since. We present the first LST-1 observations of the Crab Nebula, the standard candle of very-high-energy gamma-ray astronomy, and use them, together with simulations, to assess the performance of the telescope. LST-1 has reached the expected performance during its commissioning period-only a minor adjustment of the preexisting simulations was needed to match the telescope's behavior. The energy threshold at trigger level is around 20 GeV, rising to ≃30 GeV after data analysis. Performance parameters depend strongly on energy, and on the strength of the gamma-ray selection cuts in the analysis: angular resolution ranges from 0.°12-0.°40, and energy resolution from 15%-50%. Flux sensitivity is around 1.1% of the Crab Nebula flux above 250 GeV for a 50 hr observation (12% for 30 minutes). The spectral energy distribution (in the 0.03-30 TeV range) and the light curve obtained for the Crab Nebula agree with previous measurements, considering statistical and systematic uncertainties. A clear periodic signal is also detected from the pulsar at the center of the Nebula....
Volume
956
Issue
2
Start page
80
Issn Identifier
0004-637X
Rights
open.access
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