TY - JOUR
T1 - First Observational Results of the ALPAQUITA Air Shower Array in Bolivia
AU - ALPACA Collaboration
AU - Kawata, K.
AU - Anzorena, M.
AU - Blanco, D.
AU - de la Fuente, E.
AU - Goto, K.
AU - Hayashi, Y.
AU - Hibino, K.
AU - Hotta, N.
AU - Jimenez-Meza, A.
AU - Katayose, Y.
AU - Kato, C.
AU - Kato, S.
AU - Kawahara, I.
AU - Kawashima, T.
AU - Kawata, K.
AU - Koi, T.
AU - Kojima, H.
AU - Makishima, T.
AU - Masuda, Y.
AU - Matsuhashi, S.
AU - Matsumoto, M.
AU - Mayta, R.
AU - Miranda, P.
AU - Mizuno, A.
AU - Munakata, K.
AU - Nakamura, Y.
AU - Nina, C.
AU - Nishizawa, M.
AU - Noguchi, R.
AU - Ogio, S.
AU - Ohnishi, M.
AU - Okukawa, S.
AU - Oshima, A.
AU - Raljevich, M.
AU - Saito, T.
AU - Sako, T.
AU - Sako, T. K.
AU - Salinas, J.
AU - Sasaki, T.
AU - Shibasaki, T.
AU - Shibata, S.
AU - Shiomi, A.
AU - Subieta Vasquez, M. A.
AU - Tajima, N.
AU - Takano, W.
AU - Takita, M.
AU - Tameda, Y.
AU - Tanaka, K.
AU - Ticona, R.
AU - Toledano-Juarez, I.
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons.
PY - 2024/9/27
Y1 - 2024/9/27
N2 - The ALPACA experiment, which consists of a large air shower (AS) array and water-Cherenkov-type muon detectors, is a new project to observe sub-PeV gamma rays in the southern hemisphere. The prototype AS array, named ALPAQUITA (1/4 scale of ALPACA), has been prior operated in the center of the ALPACA site at Chacaltaya plateau (4,740 m a.s.l.) in Bolivia. The ALPAQUITA AS array consists of 97 scintillation detectors each with an area of 1 m2, deployed with 15 m spacing. Using this AS array, we have successfully observed the cosmic-ray Moon shadow with a statistical significance −6.2σ for 73 live days. The angular resolution is estimated to be 0.9◦ based on the Moon shadow observation and the even-odd method. In this proceedings, we assess the performance of ALPAQUITA AS array, and outline the future prospects of the sub-PeV gamma-ray observation with the ALPAQUITA AS+MD array.
AB - The ALPACA experiment, which consists of a large air shower (AS) array and water-Cherenkov-type muon detectors, is a new project to observe sub-PeV gamma rays in the southern hemisphere. The prototype AS array, named ALPAQUITA (1/4 scale of ALPACA), has been prior operated in the center of the ALPACA site at Chacaltaya plateau (4,740 m a.s.l.) in Bolivia. The ALPAQUITA AS array consists of 97 scintillation detectors each with an area of 1 m2, deployed with 15 m spacing. Using this AS array, we have successfully observed the cosmic-ray Moon shadow with a statistical significance −6.2σ for 73 live days. The angular resolution is estimated to be 0.9◦ based on the Moon shadow observation and the even-odd method. In this proceedings, we assess the performance of ALPAQUITA AS array, and outline the future prospects of the sub-PeV gamma-ray observation with the ALPAQUITA AS+MD array.
UR - http://www.scopus.com/inward/record.url?scp=85183386878&partnerID=8YFLogxK
M3 - Artículo de la conferencia
AN - SCOPUS:85183386878
SN - 1824-8039
VL - 444
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 257
T2 - 38th International Cosmic Ray Conference, ICRC 2023
Y2 - 26 July 2023 through 3 August 2023
ER -