Status and results of the prototype LST of CTA

Mazin, D.; Abe, Hyuga; Aguasca, Arnau; Agudo, I.; Antonelli, L. A.; Aramo, C.; Armstrong, Thomas J.; Artero, Manuel; Asano, Katsuaki; Ashkar, Halim; Aubert, Pierre; Baktash, Ali; Bamba, Aya; Larriva, Andres Baquero; Baroncelli, Leonardo; Almeida, U. Barres de; Barrio, J. A.; Batković, Ivana; González, J. Becerra; Bernardos, Mabel; Berti, Alessio; Biederbeck, Noah; Bigongiari, C.; Blanch, O.; Bonnoli, G.; Bordas, P.; Bose, D.; Bulgarelli, A.; Burelli, Irene; Buscemi, Mario; Cardillo, M.; Caroff, S.; Carosi, A.; Cassol, Franca; Cerruti, M.; Chai, Yating; Cheng, K. S.; Chikawa, M.; Chytka, L.; Contreras, J. L.; Cortina, J.; Costantini, H.; Dalchenko, M.; Angelis, A. De; Lavergne, Mathieu de Bony de; Deleglise, Guillaume; Mendez, C. Delgado; Mengual, Jordi Delgado; Volpe, D. della; Depaoli, Davide; Pierro, F. Di; Venere, L. Di; Dı́az, Carlos; Dominik, Rune Michael; Prester, D. Dominis; Donini, Alice; Dorner, D.; Doro, M.; Elsässer, Dominik; Emery, Gabriel; Escudero, Juan; Fiaßon, A.; Foffano, Luca; Fonseca, M. V.; Coromina, Lluis Freixas; Fukami, Satoshi; Fukazawa, Yasushi; García, Enrique Rivera; López, Ramon Garcia; Giglietto, N.; Giordano, F.; Gliwny, Paweł; Godinović, N.; Green, David; Grespan, Pietro; Gunji, Shuichi; Hackfeld, Jonas; Hadasch, D.; Hahn, Alexander; Hassan, Tarek; Hayashi, Kohei; Heckmann, Lea; Heller, M.; Llorente, Javier Herrera; Hirotani, Kouichi; Hoffmann, D.; Horns, D.; Houles, Julien; Hrabovský, M.; Hrupec, Dario; Hui, David; Hütten, Moritz; Inada, Tomohiro; Inome, Yusuke; Iori, M.; Ishio, Kazuma; Iwamura, Y.; Jacquemont, Mikaël; Martínez, Irene Jiménez; Jouvin, L.; Jurýšek, Jakub; Kagaya, Mika; Karas, Vladimír; Katagiri, H.; Kataoka, J.; Kerszberg, Daniel; Kobayashi, Yukiho; Kong, Albert; Kubo, H.; Kushida, J.; Lamanna, G.; Lamastra, Alessandra; Flour, T. Le; Longo, F.; López-Coto, R.; López-Moya, Marcos; López-Oramas, Alicia; Luque-Escamilla, Pedro L.; Majumdar, P.; Makariev, M.; Mandát, Dušan; Manganaro, M.; Mannheim, K.; Mariotti, M.; Márquez, Patricia; Marsella, G.; Martı́, Josep; Martinez, Oibar; Martínez, Gustavo; Martı́nez, M.; Marusevec, Petra; Mas, Alvaro; Maurin, G.; Guillen, Enrique Mestre; Mićanović, Saša; Miceli, Davide; Miener, Tjark; Miranda, Jose Miguel; Miranda, Luis David Medina; Mirzoyan, R.; Mizuno, T.; Molina, Edgar; Montaruli, T.; Monteiro, Inocencio; Moralejo, A.; Morcuende, Daniel; Moretti, E.; Morselli, A.; Mrakovcic, Karlo; Murase, Kohta; Nagai, A.; Nakamori, Takeshi; Nickel, Lukas; Nieto, D.; Nievas, Mireia; Nishijima, K.; Noda, K.; Nosek, D.; Nöthe, Maximilian; Nozaki, Seiya; Ohishi, M.; Ohtani, Yoshiki; Oka, Tomohiko; Okazaki, N.; Okumura, Akihisa; Orito, R.; Otero-Santos, Jorge; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pavletić, Lovro; Pech, M.; Pecimotika, Mario; Poireau, V.; Polo, Miguel Angel Molinero; Prandini, E.; Prast, J.; Priyadarshi, Chaitanya; Prouza, M.; Rando, R.; Rhode, W.; Ribó, M.; Rizi, Vincenzo; Rugliancich, A.; Ruíz, José Enrique; Saito, Takayuki; Sakurai, Shunsuke; Sánchez, David; Šarić, Toni; Saturni, Francesco Gabriele; Scherpenberg, Juliane van; Schleicher, Bernd; Schubert, Jan Lukas; Schüßler, F.; Schweizer, T.; Seglar-Arroyo, M.; Shellard, R. C.; Sitarek, J.; Sliusar, Vitalii; Spolon, Alessia; Strišković, Jelena; Strzys, M.; Suda, Yoshihiro; Sunada, Yuji; Tajima, H.; Takahashi, Mitsunari; Takahashi, H.; Takata, Jumpei; Takeishi, Ryuji; Tam, P. Thomas; Tanaka, Shuta J.; Tateishi, Dai; Tejedor, Luis; Temnikov, P.; Terada, Y.; Terzić, T.; Teshima, M.; Tluczykont, M.; Tokanai, Fuyuki; Torres, D. F.; Trávničék, P.; Truzzi, Stefano; Vacula, Martin; Acosta, Mónica Vázquez; Verguilov, V.; Verna, Gaia; Viale, Ilaria; Vigorito, C.; Vitale, V.; Vovk, Ievgen; Vuillaume, Thomas; Walter, R.; Will, Martin; Yamamoto, Tokonatsu; Yamazaki, Ryo; Yoshida, Tatsuo; Yoshikoshi, T.; Zarić, Darko

doi:10.22323/1.395.0872

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021) 2021

DOI: 10.22323/1.395.0872

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Status and results of the prototype LST of CTA

D. Mazin¹,

Hyuga Abe²,

Arnau Aguasca³

et al.

Abstract: The Large-Sized Telescopes (LSTs) of Cherenkov Telescope Array (CTA) are designed for gammaray studies focusing on low energy threshold, high flux sensitivity, rapid telescope repositioning speed and a large field of view. Once the CTA array is complete, the LSTs will be dominating the CTA performance between 20 GeV and 150 GeV. During most of the CTA Observatory construction phase, however, the LSTs will be dominating the array performance until several TeVs. In this presentation we will report on the status … Show more

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Cited by 3 publications

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Characterizing the aerosol atmosphere above the Observatorio del Roque de los Muchachos by analysing seven years of data taken with an GaAsP HPD-readout, absolutely calibrated elastic LIDAR

Fruck

Gaug

Hahn

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We present a new elastic LIDAR concept, based on a bi-axially mounted Nd:YAG laser and a telescope with HPD readout, combined with fast FADC signal digitization and offline pulse analysis. The LIDAR return signals have been extensively quality checked and absolutely calibrated. We analyse seven years of quasi-continuous LIDAR data taken during those nights when the MAGIC telescopes were operating. Characterization of the nocturnal ground layer yields zenith and azimuth angle dependent aerosol extinction scale heights for clear nights. We derive aerosol transmission statistics for light emitted from various altitudes throughout the year and separated by seasons. We find further seasonal dependencies of cloud base and top altitudes, but none for the LIDAR ratios of clouds. Finally, the night sky background light is characterized using the LIDAR photon backgrounds.

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Characterizing the aerosol atmosphere above the Observatorio del Roque de los Muchachos by analysing seven years of data taken with an GaAsP HPD-readout, absolutely calibrated elastic LIDAR

Fruck

Gaug

Hahn

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Testing source confusion and identification capability in Cherenkov telescope array data

Mestre

Torres

Wilhelmi

et al. 2022

Monthly Notices of the Royal Astronomical Society

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The Cherenkov Telescope Array will provide the deepest survey of the Galactic Plane performed at very-high-energy gamma-rays. Consequently, this survey will unavoidably face the challenge of source confusion, i.e., the non-unique attribution of signal to a source due to multiple overlapping sources. Among the known populations of Galactic gamma-ray sources and given their extension and number, pulsar wind nebulae (PWNe, and PWN TeV halos) will be the most affected. We aim to probe source confusion of TeV PWNe in forthcoming CTA data. For this purpose, we performed and analyzed simulations of artificially confused PWNe with CTA. As a basis for our simulations, we applied our study to TeV data collected from the H.E.S.S. Galactic Plane Survey for ten extended and two point-like firmly identified PWNe, probing various configurations of source confusion involving different projected separations, relative orientations, flux levels, and extensions among sources. Source confusion, defined here to appear when the sum of the Gaussian width of two sources is larger than the separation between their centroids, occurred in ∼30% of the simulations. For this sample and 0.5○ of average separation between sources, we found that CTA can likely resolve up to 60% of those confused sources above 500 GeV. Finally, we also considered simulations of isolated extended sources to see how well they could be matched to a library of morphological templates. The outcome of the simulations indicates a remarkable capability (more than 95% of the cases studied) to match a simulation with the correct input template in its proper orientation.

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Search for the Galactic accelerators of cosmic rays up to the knee with the Pevatron test statistic

Angüner

Spengler

Amato

et al. 2023

Monthly Notices of the Royal Astronomical Society

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The Pevatron Test Statistic (PTS) is applied to data from γ-ray observatories to test for the origin of Cosmic Rays (CRs) at energies around the knee of the CR spectrum. Several sources are analyzed within hadronic emission models. Previously derived results for RX J1713.7−3946, Vela Jr, and HESS J1745−290 are confirmed to demonstrate the concept, reliability, and advantages of the PTS. It is excluded with a significance more than 5σ that the sources RX J1713.7−3946 and Vela Jr are Pevatrons, while strong indications exceeding 4σ are found for excluding HESS J1745−290 as a Pevatron. The importance to resolve source confusion with high angular resolution observations for Pevatrons searches is demonstrated using PTS for the region containing the SNR G106.3+2.7 and the Boomerang nebula. No statistically significant conclusion with respect to Pevatron associations could be drawn from this region, for the diffuse γ-ray emission around the Galactic Center, and the unidentified γ-ray sources LHAASO J2108+5157, HESS J1702−420A and MGRO J1908+06. Assuming the entire γ-ray emission from MGRO J1908+06 and the tail region of SNR G106.3+2.7 is hadronic, a statistical indication exceeding 3σ is found for the underlying proton spectrum to extend beyond 350–400 TeV as a power-law. This result can indicate that these sources are proton and helium Pevatrons, in which the accelerated particles contribute to the knee of proton and helium spectra observed at Earth.

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Status and results of the prototype LST of CTA

Cited by 3 publications

References 1 publication

Characterizing the aerosol atmosphere above the Observatorio del Roque de los Muchachos by analysing seven years of data taken with an GaAsP HPD-readout, absolutely calibrated elastic LIDAR

Characterizing the aerosol atmosphere above the Observatorio del Roque de los Muchachos by analysing seven years of data taken with an GaAsP HPD-readout, absolutely calibrated elastic LIDAR

Testing source confusion and identification capability in Cherenkov telescope array data

Search for the Galactic accelerators of cosmic rays up to the knee with the Pevatron test statistic

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