학술논문
Observations of the Crab Nebula and Pulsar with the Large-sized Telescope Prototype of the Cherenkov Telescope Array
Document Type
article
Author
H. Abe; K. Abe; S. Abe; A. Aguasca-Cabot; I. Agudo; N. Alvarez Crespo; L. A. Antonelli; C. Aramo; A. Arbet-Engels; C. Arcaro; M. Artero; K. Asano; P. Aubert; A. Baktash; A. Bamba; A. Baquero Larriva; L. Baroncelli; U. Barres de Almeida; J. A. Barrio; I. Batkovic; J. Baxter; J. Becerra González; E. Bernardini; M. I. Bernardos; J. Bernete Medrano; A. Berti; P. Bhattacharjee; N. Biederbeck; C. Bigongiari; E. Bissaldi; O. Blanch; G. Bonnoli; P. Bordas; A. Borghese; A. Bulgarelli; I. Burelli; M. Buscemi; M. Cardillo; S. Caroff; A. Carosi; F. Cassol; D. Cauz; G. Ceribella; Y. Chai; K. Cheng; A. Chiavassa; M. Chikawa; L. Chytka; A. Cifuentes; J. L. Contreras; J. Cortina; H. Costantini; G. D’Amico; M. Dalchenko; A. De Angelis; M. de Bony de Lavergne; B. De Lotto; R. de Menezes; G. Deleglise; C. Delgado; J. Delgado Mengual; D. della Volpe; M. Dellaiera; D. Depaoli; A. Di Piano; F. Di Pierro; R. Di Tria; L. Di Venere; C. Díaz; R. M. Dominik; D. Dominis Prester; A. Donini; D. Dorner; M. Doro; D. Elsässer; G. Emery; J. Escudero; V. Fallah Ramazani; G. Ferrara; F. Ferrarotto; A. Fiasson; L. Freixas Coromina; S. Fröse; S. Fukami; Y. Fukazawa; E. Garcia; R. Garcia López; C. Gasbarra; D. Gasparrini; F. Geyer; J. Giesbrecht Paiva; N. Giglietto; F. Giordano; E. Giro; P. Gliwny; N. Godinovic; R. Grau; D. Green; J. Green; S. Gunji; J. Hackfeld; D. Hadasch; A. Hahn; K. Hashiyama; T. Hassan; K. Hayashi; L. Heckmann; M. Heller; J. Herrera Llorente; K. Hirotani; D. Hoffmann; D. Horns; J. Houles; M. Hrabovsky; D. Hrupec; D. Hui; M. Hütten; M. Iarlori; R. Imazawa; T. Inada; Y. Inome; K. Ioka; M. Iori; K. Ishio; Y. Iwamura; M. Jacquemont; I. Jimenez Martinez; J. Jurysek; M. Kagaya; V. Karas; H. Katagiri; J. Kataoka; D. Kerszberg; Y. Kobayashi; A. Kong; H. Kubo; J. Kushida; M. Lainez; G. Lamanna; A. Lamastra; T. Le Flour; M. Linhoff; F. Longo; R. López-Coto; M. López-Moya; A. López-Oramas; S. Loporchio; A. Lorini; P. L. Luque-Escamilla; P. Majumdar; M. Makariev; D. Mandat; M. Manganaro; G. Manicò; K. Mannheim; M. Mariotti; P. Marquez; G. Marsella; J. Martí; O. Martinez; G. Martínez; M. Martínez; P. Marusevec; A. Mas-Aguilar; G. Maurin; D. Mazin; E. Mestre Guillen; S. Micanovic; D. Miceli; T. Miener; J. M. Miranda; R. Mirzoyan; T. Mizuno; M. Molero Gonzalez; E. Molina; T. Montaruli; I. Monteiro; A. Moralejo; D. Morcuende; A. Morselli; K. Mrakovcic; K. Murase; A. Nagai; S. Nagataki; T. Nakamori; L. Nickel; M. Nievas; K. Nishijima; K. Noda; D. Nosek; S. Nozaki; M. Ohishi; Y. Ohtani; T. Oka; N. Okazaki; A. Okumura; R. Orito; J. Otero-Santos; M. Palatiello; D. Paneque; F. R. Pantaleo; R. Paoletti; J. M. Paredes; M. Pech; M. Pecimotika; M. Peresano; A. Pérez; E. Pietropaolo; G. Pirola; C. Plard; F. Podobnik; V. Poireau; M. Polo; E. Pons; E. Prandini; J. Prast; G. Principe; C. Priyadarshi; M. Prouza; R. Rando; W. Rhode; M. Ribó; V. Rizi; G. Rodriguez Fernandez; J. E. Ruiz; T. Saito; S. Sakurai; D. A. Sanchez; T. Šarić; Y. Sato; F. G. Saturni; B. Schleicher; F. Schmuckermaier; J. L. Schubert; F. Schussler; T. Schweizer; M. Seglar Arroyo; R. Silvia; J. Sitarek; V. Sliusar; A. Spolon; J. Strišković; M. Strzys; Y. Suda; Y. Sunada; H. Tajima; H. Takahashi; M. Takahashi; J. Takata; R. Takeishi; P. H. T. Tam; S. J. Tanaka; D. Tateishi; L. A. Tejedor; P. Temnikov; Y. Terada; K. Terauchi; T. Terzic; M. Teshima; M. Tluczykont; F. Tokanai; D. F. Torres; P. Travnicek; S. Truzzi; A. Tutone; G. Uhlrich; M. Vacula; P. Vallania; J. van Scherpenberg; M. Vázquez Acosta; V. Verguilov; I. Viale; A. Vigliano; C. F. Vigorito; V. Vitale; G. Voutsinas; I. Vovk; T. Vuillaume; R. Walter; M. Will; T. Yamamoto; R. Yamazaki; T. Yoshida; T. Yoshikoshi; N. Zywucka; K. Bernlöhr; O. Gueta; K. Kosack; G. Maier; J. Watson
Source
The Astrophysical Journal, Vol 956, Iss 2, p 80 (2023)
Subject
Language
English
ISSN
1538-4357
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.