Author: "S. Yanagita" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"S. Yanagita"' showing total 232 results

Start Over Author "S. Yanagita"

232 results on '"S. Yanagita"'

1. Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons+Positrons in the TeV Region with CALET on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, G. A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Published: 2023
Full Text: View/download PDF

2. Direct measurements of cosmic rays with the calorimetric electron telescope on the international space station

Author: Y. Akaike, O. Adriani, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, W. V. Zober
Subjects: Physics, QC1-999
Abstract: The CALorimetric Electron Telescope, CALET, has been measuring high-energy cosmic rays on the International Space Station since October 13, 2015. The scientific objectives addressed by the mission are to search for possible nearby sources of high-energy electrons and potential signatures of dark matter, and to investigate the details of galactic cosmic-ray acceleration and propagation. The calorimetric instrument, which is 30 radiation lengths or 1.3 proton interaction lengths thick with fine imaging capability, is optimized to measure cosmic-ray electrons by achieving large proton rejection and excellent energy resolution well into the TeV region. In addition, very wide dynamic range of energy measurement and individual charge identification capability enable us to measure proton and nuclei spectra from a few tens GeV to a PeV scale. Nearly 20 million cosmic-ray shower events over 10 GeV per month are triggered and the continuous observation has been kept without any major interruption since the start of operation. Using the data obtained over 6.5 years of operation, we will present a brief summary of the CALET observation including electron spectrum, and proton and nuclei spectra as well as the performance study on orbit with MC simulations.
Published: 2023
Full Text: View/download PDF

3. Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, G. A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Published: 2023
Full Text: View/download PDF

4. Direct Measurement of the Cosmic-Ray Helium Spectrum from 40 GeV to 250 TeV with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, G. A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Published: 2023
Full Text: View/download PDF

5. Cosmic-Ray Boron Flux Measured from 8.4 GeV/n to 3.8 TeV/n with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, G. A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Published: 2022
Full Text: View/download PDF

6. Observation of Spectral Structures in the Flux of Cosmic-Ray Protons from 50 GeV to 60 TeV with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Published: 2022
Full Text: View/download PDF

7. CALET Search for Electromagnetic Counterparts of Gravitational Waves During the LIGO/Virgo O3 Run

Author: O Adriani, Y Akaike, K Asano, Y Asaoka, E Berti, G Bigongiari, W R Binns, M Bongi, P Brogi, A Bruno, J H Buckley, N Cannady, G Castellini, C Checchia, M L Cherry, G Collazuol, K Ebisawa, A W Ficklin, H Fuke, S Gonzi, T G Guzik, T Hams, K Hibino, M Ichimura, K Ioka, W Ishizak, M H Israel, K Kasahara, J Kataoka, R Kataoka, Y Katayose, C Kato, N Kawanaka, Y Kawakubo, K Kobayashi, K Kohri, H S Krawczynski, J F Krizmanic, P Maestro, P S Marrocches, A M Messineo, J W Mitchell, S Miyake, A A Moiseev, M Mori, N Mori, H M Motz, K Munakata, S Nakahira, J Nishimura, G A de Nolfo, S Okuno, J F Ormes, N Ospina, S Ozawa, L Pacini, P Papini, B F Rauch, S B Ricciarini, K Sakai, T Sakamoto, M Sasaki, Y Shimizu, A Shiomi, P Spillantini, F Stolzi, S Sugita, A Sulaj, M Takita, T Tamura, T Terasawa, S Torii, Y Tsunesada, Y Uchihori, E Vannuccini, J P Wefel, K Yamaoka, S Yanagita, A Yoshida, K Yoshida, and W V Zober
Subjects: Astronomy
Abstract: The CALorimetric Electron Telescope (CALET)on the International Space Station consists of a high-energy cosmic-ray CALorimeter (CAL)and a lower-energy CALET Gamma-ray Burst Monitor (CGBM). CAL is sensitive to electrons up to 20 TeV, cosmic-ray nuclei from Z=1 throughZ∼40, and gamma rays over the range1 GeV–10 TeV. CGBM observes gamma rays from 7 keV to 20 MeV. The combined CAL-CGBM instrument has conducted a search for gamma-ray bursts (GRBs)since 2015 October. We report here on the results of a search for X-ray/gamma-ray counterparts to gravitational-wave events reported during the LIGO/Virgo observing run O3. No events have been detected that pass all acceptance criteria. We describe the components, performance, and triggering algorithms of the CGBM—the two Hard X-ray Monitors consisting of LaBr3(Ce)scintillators sensitive to 7 keV–1 MeV gamma rays and a Soft Gamma-ray Monitor BGO scintillator sensitive to 40 keV–20 MeV—and the high-energy CAL consisting of a charge detection module, imaging calorimeter, and the fully active total absorption calorimeter. The analysis procedure is described and upper limits to the time-averaged fluxes are presented.
Published: 2022
Full Text: View/download PDF

8. Direct Measurement of the Nickel Spectrum in Cosmic Rays in the Energy Range from 8.8 GeV/n to 240 GeV/n with CALET on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, N. Ospina, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Published: 2022
Full Text: View/download PDF

9. Measurement of the Iron Spectrum in Cosmic Rays from 10 GeV/n to 2.0 TeV/n with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, J. Link, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, N. Ospina, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, and K. Yoshida
Published: 2021
Full Text: View/download PDF

10. Direct Measurement of the Cosmic-Ray Carbon and Oxygen Spectra from 10 GeV/n to 2.2 TeV/n with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, J. Link, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. De Nolfo, S. Okuno, J. F. Ormes, N. Ospina, S. Ozawa, L. Pacini, F. Palma, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, S. Sugita, J. E. Suh, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, and K. Yoshida
Subjects: Astrophysics
Abstract: In this paper, we present the measurement of the energy spectra of carbon and oxygen in cosmic rays based on observations with the Calorimetric Electron Telescope on the International Space Station from October 2015 to October 2019. Analysis, including the detailed assessment of systematic uncertainties, and results are reported. The energy spectra are measured in kinetic energy per nucleon from 10 GeV/n to 2.2 TeV/n with an all-calorimetric instrument with a total thickness corresponding to 1.3 nuclear interaction length. The observed carbon and oxygen fluxes show a spectral index change of ∼0.15 around 200 GeV/n established with a significance > 3σ. They have the same energy dependence with a constant C/O flux ratio 0.911 ± 0.006 above 25 GeV/n. The spectral hardening is consistent with that measured by AMS-02, but the absolute normalization of the flux is about 27% lower, though in agreement with observations from previous experiments including the PAMELA spectrometer and the calorimetric balloon-borne experiment CREAM.
Published: 2020
Full Text: View/download PDF

11. CALET on the International Space Station: the first three years of observations

Author: P Brogi, O Adriani, Y Akaike, K Asano, Y Asaoka, M G Bagliesi, E Berti, G Bigongiari, W R Binns, S Bonechi, M Bongi, A Bruno, J H Buckley, N Cannady, G Castellini, C Checchia, M L Cherry, G Collazuol, V Di Felice, K Ebisawa, H Fuke, T G Guzik, T Hams, K Hibino, M Ichimura, K Ioka, W Ishizaki, M H Israel, K Kasahara, J Kataoka, R Kataoka, Y Katayose, C Kato, N Kawanaka, Y Kawakubo, K Kohri, H S Krawczynski, J F Krizmanic, J Link, P Maestro, P S Marrocchesi, A M Messineo, J W Mitchell, S Miyake, A A Moiseev, M Mori, N. Mori, H M Motz, K Munakata, H Murakami, S Nakahira, J Nishimura, G A de Nolfo, S Okuno, J F Ormes, N Ospina, S Ozawa, L Pacini, F Palma, P Papini, B F Rauch, S B Ricciarini, K Saka, T Sakamoto, M Sasaki, Y Shimizu, A Shiomi, R Sparvoli, P Spillantini, F Stolzi, S Sugita, J E Suh, A Sulaj, I Takahashi, M Takita, T Tamura, T Terasawa, S Torii, Y Tsunesada, Y Uchihori, E Vannuccini, J P Wefel, K Yamaoka, S Yanagita, A Yoshida, and K Yoshida
Subjects: Instrumentation And Photography, Astrophysics
Abstract: The CALorimetric Electron Telescope CALET is a space instrument designed to carry out precision measurements of high energy cosmic-rays on the JEM-EF external platform on the International Space Station, where it has been collecting science data continuously since mid-October 2015. In addition to its primary goal of identifying nearby sources of high-energy electrons and possible signatures of dark matter in the electron spectrum, CALET is carrying out extensive measurements of the energy spectra, relative abundances and secondary-to-primary ratios of elements from proton to iron, and even above (up to Z = 40), studying the details of galactic particle propagation and acceleration. An overview of CALET based on the data taken during the first three years of observations is presented, including a direct measurement of the electron+positron energy spectrum from 11 GeV to 4.8 TeV. The proton spectrum has been measured from 50 GeV to 10 TeV covering, for the first time with a single space-borne instrument, the whole energy interval previously investigated in separate sub-ranges by magnetic spectrometers and calorimetric instruments. Preliminary spectra of cosmic-ray nuclei are also presented, together with gamma-ray observations and searches for an e.m. counterpart of LIGO/ Virgo GW events.
Published: 2020
Full Text: View/download PDF

12. CALET Results after Three Years on the International Space Station

Author: Y Asaoka, O Adriani, Y Akaike, K Asano, M G Bagliesi, E Berti, G Bigongiari, W R Binns, S Bonechi, M Bongi, A Bruno, J H Buckley, N Cannady, G Castellini, C Checchia, M L Cherry, G Collazuol, V Di Felice, K Ebisawa, H Fuke, T G Guzik, T Hams, K Hibino, M Ichimura, K Ioka, W Ishizaki, M H Israel, K Kasahara, J Kataoka, R Kataoka, Y Katayose, C Kato, N Kawanaka, Y Kawakubo, K Kohri, H S Krawczynski, J F Krizmanic, J Link, P Maestro, P S Marrocchesi, A M Messineo, J W Mitchell, S Miyake, A A Moiseev, M Mori, H M Motz, K Munakata, S Nakahira, J Nishimura, G A De Nolfo, S Okuno, N Opsina, J F Ormes, S Ozawa, L Pacini, F Palma, V Pal'shin, P Papini, B F Rauch, S B Ricciarini, K Sakai, T Sakamoto, M Sasaki, Y Shimizu, A Shiomi, R Sparvoli, P Spillantini, F Stolzi, S Sugita, J E Suh, A Sulaj, I Takahashi, M Takita, T Tamura, T Terasawa, S Torii, Y Tsunesada, Y Uchihori, E Vannuccini, J P Wefel, K Yamaoka, S Yanagita, A Yoshida, and K Yoshida
Subjects: Astronomy
Abstract: The CALET (CALorimetric Electron Telescope) space experiment, which is currently conducting direct cosmic-ray observations onboard the International Space Station (ISS), is an all-calorimetric instrument optimized for cosmic-ray electron measurements with capability to measure hadrons and gamma-rays. Since the start of observation in October 2015, smooth and continuous operations have taken place. In this paper, we will give a brief summary of the CALET observations ranging from charged cosmic rays, gamma-rays, to space weather, while focusing on the energy spectra of electrons and protons.
Published: 2020
Full Text: View/download PDF

13. Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, and K. Yoshida
Published: 2019
Full Text: View/download PDF

14. The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years On Orbit

Author: Y Asaoka, O Adriani, Yosui Akaike, Katsuaki Asano, M G Bagliesi, E Berti, G Bigongiari, W R Binns, S Bonechi, M Bongi, A Bruno, Paolo Brogi, J H Buckley, N Cannady, G Castellini, C Checchia, M L Cherry, G Collazuol, V Di Felice, K Ebisawa, Hideyuki Fuke, T Gregory Guzik, T Hams, N Hasebe, K Hibino, M Ichimura, K Ioka, W Ishizaki, M H Israel, K Kasahara, J Kataoka, R Kataoka, Y Katayose, C Kato, N Kawanaka, Y Kawakubo, K Kohri, H S Krawczynski, John F Krizmanic, T Lomtadze, Paolo Maestro, P S Marrocchesi, A M Messineo, John W Mitchell, S Miyake, Alexander A Moiseev, K Mori, M Mori, N Mori, H M Motz, K Munakata, H Murakami, Satoshi Nakahira, J Nishimura, Georgia Adair De Nolfo, James O Okuno, J F Ormes, S Ozawa, L Pacini, F Palma, V Pal’shin, P Papini, A V Penacchioni, B F Rauch, S B Ricciarini, Kenichi Sakai, Takuma Sakamoto, M Sasaki, A Shiomi, R Sparvoli, P Spillantini, F Stolzi, S Sugita, J E Suh, A Sulaj, I Takahashi, M Takayanagi, M Takita, Takumi Tamura, N Tateyama, T Terasawa, H Tomida, S Torii, Yoshiki Tsunesada, Y Uchihori, S Ueno, E Vannuccini, J P Wefel, K Yamaoka, S Yanagita, A Yoshida, K Yoshida, and Y Shimizu
Subjects: Physics Of Elementary Particles And Fields
Abstract: The CALorimetric Electron Telescope (CALET) is a high-energy astroparticle physics space experiment installed on the International Space Station (ISS), developed and operated by Japan in collaboration with Italy and the United States. The CALET mission goals include the investigation of possible nearby sources of high-energy electrons, of the details of galactic particle acceleration and propagation, and of potential signatures of dark matter. CALET measures the cosmic-ray electron+positron flux up to 20 TeV, gamma-rays up to 10 TeV, and nuclei with Z=1 to 40 up to 1,000 TeV for the more abundant elements during a long-term observation aboard the ISS. Starting science operation in mid-October 2015, CALET performed continuous observation without major interruption with close to 20 million triggered events over 10 GeV per month. Based on the data taken during the �rst two-years, we present an overview of CALET observations: 1) Electron+positron energy spectrum, 2) Nuclei analysis, 3) Gamma-ray observation including a characterization of on-orbit performance. Results of the electromagnetic counterpart search for LIGO/Virgo gravitational wave events are discussed as well.
Published: 2019
Full Text: View/download PDF

15. Extended Measurement of the Cosmic-Ray Electron and Positron Spectrum from 11 GeV to 4.8 TeV with the Calorimetric Electron Telescope on the International Space Station

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, T. Lomtadze, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, K. Mori, M. Mori, N. Mori, H. M. Motz, K. Munakata, H. Murakami, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, S. Ozawa, L. Pacini, F. Palma, P. Papini, A. V. Penacchioni, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, R. Sparvoli, P. Spillantini, F. Stolzi, J. E. Suh, A. Sulaj, I. Takahashi, M. Takayanagi, M. Takita, T. Tamura, N. Tateyama, T. Terasawa, H. Tomida, S. Torii, Y. Tsunesada, Y. Uchihori, S. Ueno, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, and K. Yoshida
Published: 2018
Full Text: View/download PDF

16. CALET Search for electromagnetic counterparts of gravitational waves during the LIGO/Virgo O3 run

Author: O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo, K. Kobayashi, K. Kohri, H. S. Krawczynski, J. F. Krizmanic, P. Maestro, P. S. Marrocchesi, A. M. Messineo, J. W. Mitchell, S. Miyake, A. A. Moiseev, M. Mori, N. Mori, H. M. Motz, K. Munakata, S. Nakahira, J. Nishimura, G. A. de Nolfo, S. Okuno, J. F. Ormes, N. Ospina, S. Ozawa, L. Pacini, P. Papini, B. F. Rauch, S. B. Ricciarini, K. Sakai, T. Sakamoto, M. Sasaki, Y. Shimizu, A. Shiomi, P. Spillantini, F. Stolzi, S. Sugita, A. Sulaj, M. Takita, T. Tamura, T. Terasawa, S. Torii, Y. Tsunesada, Y. Uchihori, E. Vannuccini, J. P. Wefel, K. Yamaoka, S. Yanagita, A. Yoshida, K. Yoshida, and W. V. Zober
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Gamma-ray astronomy Gamma-ray bursts Gravitational wave sources Gamma-ray transient sources, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The CALorimetric Electron Telescope (CALET) on the International Space Station (ISS) consists of a high-energy cosmic ray CALorimeter (CAL) and a lower-energy CALET Gamma ray Burst Monitor (CGBM). CAL is sensitive to electrons up to 20 TeV, cosmic ray nuclei from Z = 1 through Z $\sim$ 40, and gamma rays over the range 1 GeV - 10 TeV. CGBM observes gamma rays from 7 keV to 20 MeV. The combined CAL-CGBM instrument has conducted a search for gamma ray bursts (GRBs) since Oct. 2015. We report here on the results of a search for X-ray/gamma ray counterparts to gravitational wave events reported during the LIGO/Virgo observing run O3. No events have been detected that pass all acceptance criteria. We describe the components, performance, and triggering algorithms of the CGBM - the two Hard X-ray Monitors (HXM) consisting of LaBr$_{3}$(Ce) scintillators sensitive to 7 keV to 1 MeV gamma rays and a Soft Gamma ray Monitor (SGM) BGO scintillator sensitive to 40 keV to 20 MeV - and the high-energy CAL consisting of a CHarge-Detection module (CHD), IMaging Calorimeter (IMC), and fully active Total Absorption Calorimeter (TASC). The analysis procedure is described and upper limits to the time-averaged fluxes are presented., 27 pages, 10 figures. Accepted for publication in ApJ
Published: 2022

17. Cherenkov Telescope Array : the World’s largest VHE gamma-ray observatory

Author: Roberta Zanin, H. Abdalla, H. Abe, S. Abe, A. Abusleme, F. Acero, A. Acharyya, V. Acin Portella, K. Ackley, R. Adam, C. Adams, S.S. Adhikari, I. Aguado Ruesga, I. Agudo, R. Aguilera, A. Aguirre Santaella, F. Aharonian, A. Alberdi, R. Alfaro, J. Alfaro, C. Alispach, R. Aloisio, R. Alves Batista, J.P. Amans, L. Amati, E. Amato, L. Ambrogi, G. Ambrosi, M. Ambrosio, R. Ammendola, J. Anderson, M. Anduze, E.O. Anguner, L.A. Antonelli, V. Antonuccio, P. Antoranz, R. Anutarawiramkul, J. Aragunde Gutierrez, C. Aramo, A. Araudo, M. Araya, A. Arbet Engels, C. Arcaro, V. Arendt, C. Armand, T. Armstrong, F. Arqueros, L. Arrabito, B. Arsioli, M. Artero, K. Asano, Y. Ascasibar, J. Aschersleben, M. Ashley, P. Attina, P. Aubert, C. B. Singh, D. Baack, A. Babic, M. Backes, V. Baena, S. Bajtlik, A. Baktash, C. Balazs, M. Balbo, O. Ballester, J. Ballet, B. Balmaverde, A. Bamba, R. Bandiera, A. Baquero Larriva, P. Barai, C. Barbier, V. Barbosa Martins, M. Barcelo, M. Barkov, M. Barnard, L. Baroncelli, U. Barres de Almeida, J.A. Barrio, D. Bastieri, P.I. Batista, I. Batkovic, C. Bauer, R. Bautista González, J. Baxter, U. Becciani, J. Becerra González, Y. Becherini, G. Beck, J. Becker Tjus, W. Bednarek, A. Belfiore, L. Bellizzi, R. Belmont, W. Benbow, D. Berge, E. Bernardini, M.I. Bernardos, K. Bernlöhr, A. Berti, M. Berton, B. Bertucci, V. Beshley, N. Bhatt, S. Bhattacharyya, W. Bhattacharyya, B. Y. Bi, G. Bicknell, N. Biederbeck, C. Bigongiari, A. Biland, R. Bird, E. Bissaldi, J. Biteau, M. Bitossi, O. Blanch, M. Blank, J. Blazek, J. Bobin, C. Boccato, F. Bocchino, C. Boehm, M. Bohacova, C. Boisson, J. Boix, J.P. Bolle, J. Bolmont, G. Bonanno, C. Bonavolontà, L. Bonneau Arbeletche, G. Bonnoli, P. Bordas, J. Borkowski, R. Bose, D. Bose, Z. Bosnjak, E. Bottacini, Markus Böttcher, M.T. Botticella, C. Boutonnet, F. Bouyjou, V. Bozhilov, E. Bozzo, L. Brahimi, C. Braiding, S. Brau Nogue, S. Breen, J. Bregeon, M. Breuhaus, A. Brill, W. Brisken, E. Brocato, A.M. Brown, K. Brügge, P. Brun, F. Brun, L. Brunetti, G. Brunetti, P. Bruno, A. Bruno, A. Bruzzese, N. Bucciantini, J. H. Buckley, R. Bühler, A. Bulgarelli, T. Bulik, M. Bünning, M. Bunse, M. Burton, A. Burtovoi, M. Buscemi, S. Buschjager, G. Busetto, J. Buss, K. Byrum, A. Caccianiga, F. Cadoux, A. Calanducci, C. Calderon, J. Calvo Tovar, R. A. Cameron, P. Campana, R. Canestrari, F. Cangemi, B. Cantlay, M. Capalbi, M. Capasso, M. Cappi, A. Caproni, R. Capuzzo Dolcetta, P. Caraveo, V. Cárdenas, L. Cardiel, M. Cardillo, C. Carlile, S. Caroff, R. Carosi, A. Carosi, E. Carquin, M. Carrere, J.M. Casandjian, S. Casanova, F. Cassol, F. Catalani, O. Catalano, D. Cauz, A. Ceccanti, C. Celestino Silva, K. Cerny, M. Cerruti, E. Chabanne, P. Chadwick, Y. Chai, P. Chambery, C. Champion, S. Chaty, A. Chen, K. Cheng, M. Chernyakova, G. Chiaro, A. Chiavassa, M. Chikawa, V.R. Chitnis, J. Chudoba, L. Chytka, S. Cikota, A. Circiello, P. Clark, M. Colak, E. Colombo, S. Colonges, A. Comastri, A. Compagnino, V. Conforti, E. Congiu, R. Coniglione, J. Conrad, F. Conte, J.L. Contreras, P. Coppi, R. Cornat, J. Coronado Blazquez, J. Cortina, A. Costa, H. Costantini, G. Cotter, B. Courty, S. Covino, S. Crestan, P. Cristofari, R. Crocker, J. Croston, K. Cubuk, O. Cuevas, X. Cui, G. Cusumano, S. Cutini, G. D'Amico, F. D'Ammando, P. D'Avanzo, P. Da Vela, M. Dadina, S. Dai, M. Dalchenko, M. Dall'Ora, M.K. Daniel, J. Dauguet, I. Davids, J. Davies, B. Dawson, A. De Angelis, A.E. de Araujo Carvalho, M. de Bony de Lavergne, G. De Cesare, F. de Frondat, I. de la Calle, E. de Gouveia Dal Pino, B. De Lotto, A. De Luca, D. De Martino, M. de Naurois, E. de Ona Wilhelmi, F. De Palma Persio, N. De Simone, V. de Souza Valle, E. Delagnes, G. Deleglise Reznicek, C. Delgado, A.G. Delgado Giler, J. Delgado Mengual Valle, Domenico Della Volpe, D. Depaoli, J. Devin, T. Di Girolamo, C. Di Giulio Pierro, L. Di Venere, C. Díaz, C. Dib, S. Diebold, S. Digel, A. Djannati Atai, J. Djuvsland, A. Dmytriiev, K. Docher, A. Domínguez, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, Rita Cassia dos Anjos, J.L. Dournaux, T. Downes, G. Drake, H. Drass, D. Dravins, C. Duangchan, A. Duara, G. Dubus, L. Ducci, C. Duffy, D. Dumora, K. Dundas Mora, A. Durkalec, V.V. Dwarkadas, J. Ebr, C. Eckner, J. Eder, E. Edy, K. Egberts, S. Einecke, C. Eleftheriadis, D. Elsässer, G. Emery, D. Emmanoulopoulos, J.P. Ernenwein, M. Errando, P. Escarate, J. Escudero, C. Espinoza, S. Ettori, A. Eungwanichayapant, P. Evans, C. Evoli, M. Fairbairn, D. Falceta Goncalves, A. Falcone, V. Fallah Ramazanı, R. Falomo, K. Farakos, G. Fasola, A. Fattorini, Y. Favre, R. Fedora, E. Fedorova, K. Feijen, Q. Feng, G. Ferrand, G. Ferrara, O. Ferreira, M. Fesquet, E. Fiandrini, A. Fiasson, M. Filipovic, D. Fink, J.P. Finley, V. Fioretti, D.F.G. Fiorillo, M. Fiorini, S. Flis, H. Flores, L. Foffano, C. Fohr, M.V. Fonseca, L. Font, G. Fontaine, O. Fornieri, P. Fortin, L. Fortson, N. Fouque, B. Fraga, A. Franceschini, F.J. Franco, L. Freixas Coromina, L. Fresnillo, D. Fugazza, Y. Fujita, S. Fukami, Y. Fukazawa, D. Fulla, S. Funk, A. Furniss, S. Gabici, D. Gaggero, G. Galanti, P. Galdemard, Y. A. Gallant, D. Galloway, S. Gallozzi, V. Gammaldi, R. Garcia, L. E. García-Muñoz, E. Garcia Lopez, F. Gargano, C. Gargano, S. Garozzo, D. Gascon, T. Gasparetto, D. Gasparrini, H. Gasparyan, M. Gaug, N. Geffroy, A. Gent, S. Germani, A. Ghalumyan, A. Ghedina, G. Ghirlanda, F. Gianotti, S. Giarrusso, M. Giarrusso, G. Giavitto, B. Giebels, N. Giglietto, V. Gika, F. Gillardo, R. Gimenes, F. Giordano, E. Giro, M. Giroletti, Andrea Giuliani, M. Gjaja, J.F. Glicenstein, P. Gliwny, H. Goksu, P. Goldoni, J.L. Gomez, M.M. Gonzalez, Juan Manuel Gonzalez, K.S. Gothe, D. Gotz Coelho, T. Grabarczyk, R. Graciani, P. Grandi, G. Grasseau, D. Grasso, D. Green, J. Green, T. Greenshaw, P. Grespan, A. Grillo, M.H. Grondin, J. Grube, V. Guarino, B. Guest, O. Gueta, M. Günduz, S. Gunji, G. Gyuk, J. Hackfeld, D. Hadasch, L. Hagge, A. Hahn, J.E. Hajlaoui, A. Halim, P. Hamal, W. Hanlon, Y. Harada, M.J. Hardcastle, M. Harvey Collado, T. Haubold, A. Haupt, M. Havelka, K. Hayashi, M. Hayashida, H. He, L. Heckmann, M. Heller, F. Henault, Gilles Henri, G. Hermann, S. Hernández Cadena, J. Herrera Llorente, O. Hervet, J. Hinton, A. Hiramatsu, K. Hirotani, B. Hnatyk, R. Hnatyk, J.K. Hoang, D. H.H. Hoffmann, C. Hoischen, J. Holder, M. Holler, B. Hona, D. Horan, Dieter Horns, P. Horvath, J. Houles, M. Hrabovsky, D. Hrupec, Y. Huang, J.‑M. Huet, G. Hughes, G. Hull, T.B. Humensky, M. Hütten, M. Iarlori, J.M. Illa, R. Imazawa, T. Inada, F. Incardona, A. Ingallinera, S. Inoue, T. Inoue, Y. Inoue, F. Iocco, K. Ioka, M. Ionica, S. Iovenitti, A. Iriarte, K. Ishio, W. Ishizaki, Y. Iwamura, J. Jacquemier, M. Jacquemont, M. Jamrozy, P. Janecek, F. Jankowsky, A. JardinBlicq, C. Jarnot, P. Jean Martínez, L. Jocou, N. Jordana, M. Josselin, I. JungRichardt, F.J.P.A. Junqueira, C. Juramy Gilles, P. Kaaret, L.H.S. Kadowaki, M. Kagaya, R. Kankanyan, D. Kantzas, V. Karas, A. Karastergiou, S. Karkar, J. Kasperek, H. Katagiri, J. Kataoka, K. Katarzynski, S. Katsuda, N. Kawanaka, D. Kazanas, D. Kerszberg, B. Khélifi, M.C. Kherlakian, T.P. Kian, D.B. Kieda, T. Kihm, S. Kim, S. Kisaka, R. Kissmann, R. Kleijwegt, G. Kluge, W. Kluźniak, J. Knapp, A. Kobakhidze, Y. Kobayashi, B. Koch, J. Kocot, K. Kohri, N. Komin, A. Kong, K. Kosack, F. Krack, M. Krause, F. Krennrich, H. Kubo, V. N. Kudryavtsev, S. Kunwar, J. Kushida, P. Kushwaha, Barbera Parola, G. La Rosa, R. Lahmann, A. Lamastra, M. Landoni, D. Landriu, R.G. Lang, J. Lapington, P. Laporte, P. Lason, J. Lasuik, J. Lazendic Galloway, T. Le Flour, P. Le Sidaner, S. Leach, S.H. Lee, W.H. Lee, S. Lee Oliveira, A. Lemiere, M. Lemoine Goumard, J.P. Lenain, F. Leone, V. Leray, G. Leto, F. Leuschner, R. Lindemann, E. Lindfors, L. Linhoff, I. Liodakis, A. Lipniacka, M. Lobo, Thomas Lohse, S. Lombardi, A. Lopez, M. Lopez, R. Lopez Coto, F. Louis, M. Louys, F. Lucarelli, H. Ludwig Boudi, P.L. Luque Escamilla, M.C. Maccarone, E. Mach, A.J. Maciejewski, J. Mackey, P. Maeght, C. Maggio, G. Maier, P. Majumdar, M. Makariev, M. Mallamaci, R. Malta Nunes de Almeida, D. Malyshev, D. Mandat, G. Maneva, M. Manganaro, P. Manigot, K. Mannheim, N. Maragos, D. Marano, M. Marconi, A. Marcowith, M. Marculewicz, B. Marcun, J. Marin, N. Marinello, P. Marinos, S. Markoff, P. Marquez, G. Marsella, J. M. Martin, P. G. Martin, M. Martinez, G. Martinez, O. Martinez, H. Martinez Huerta, C. Marty, R. Marx, N. Masetti, P. Massimino, H. Matsumoto, N. Matthews, G. Maurin, W. Max Moerbeck, N. Maxted, M.N. Mazziotta, S.M. Mazzola, J.D. Mbarubucyeye, L. Mc Comb, I. McHardy, S. McKeague, S. McMuldroch, E. Medina, D. Medina Miranda, A. Melandri, C. Melioli, D. Melkumyan, S. Menchiari, S. Mereghetti, G. Merino Arevalo, E. Mestre, J.L. Meunier, T. Meures, S. Micanovic, M. Miceli, M. Michailidis, J. Michalowski, T. Miener, I. Mievre, J. D. Miller, T. Mineo, M. Minev, J.M. Miranda, A. Mitchell, T. Mizuno, B. A. Mode, R. Moderski, L. Mohrmann, E. Molinari, T. Montaruli, I. Monteiro, C. Moore, A. Moralejo, D. Morcuende Parrilla, E. Moretti, K. Mori, P. Moriarty, K. Morik, P. Morris, A. Morselli, K. Mosshammer, R. Mukherjee, J. Muller, C. Mundell, J. Mundet, T. Murach, A. Muraczewski, H. Muraishi, I. Musella, A. Musumarra, A. Nagai, S. Nagataki, T. Naito, T. Nakamori, K. Nakashima, K. Nakayama, N. Nakhjiri, G. Naletto, D. Naumann, L. Nava, M.A. Nawaz, H. Ndiyavala, D. Neise, L. Nellen, R. Nemmen, N. Neyroud, K. Ngernphat, T. Nguyen Trung, L. Nicastro, L. Nickel, J. Niemiec, D. Nieto, C. Nigro, M. Nikołajuk, D. Ninci, K. Noda, Y. Nogami, S. Nolan, R. P. Norris, D. Nosek, M. Nöthe, V. Novotny, S. Nozaki, F. Nunio, P. O'Brien, K. Obara, Y. Ohira, M. Ohishi, S. Ohm, T. Oka, N. Okazaki, A. Okumura, C. Oliver, G. Olivera, B. Olmi, M. Orienti, R. Orito, M. Orlandini, E. Orlando, J.P. Osborne, M. Ostrowski, N. Otte, E. Ovcharov, E. Owen, I. Oya, A. Ozieblo, M. Padovani, A. Pagliaro, A. Paizis, M. Palatiello, M. Palatka, E. Palazzi, J.‑L. Panazol, D. Paneque, S. Panny, Francesca Romana Pantaleo, M. Panter, M. Paolillo, A. Papitto, A. Paravac, J.M. Paredes, G. Pareschi, N. Parmiggiani, R.D. Parsons, P. Paśko, S. R. Patel, B. Patricelli, L. Pavletic, S. Pavy, A. Peer, M. Pecimotika, M.G. Pellegriti, P. Peñil Del Campo, A. Pepato, S. Perard, C. Perennes, M. Peresano, A. Perez Aguilera, J. Perez Romero, M.A. Perez Torres, M. Persic, P. O. Petrucci, O. Petruk, B. Peyaud, K. Pfrang, E. Pian, P. Piatteli, E. Pietropaolo, R. Pillera, D. Pimentel, F. Pintore, C. Pio Garcia, G. Pirola, F. Piron, S. Pita, M. Pohl, V. Poireau, A. Pollo, M. Polo, C. Pongkitivanichkul, J. Porthault, J. Powell, D. Pozo, R.R. Prado, E. Prandini, J. Prast, K. Pressard, G. Principe, N. Produit, D. Prokhorov, H. Prokoph, H. Przybilski, E. Pueschel, G. Pühlhofer, I. Puljak, M.L. Pumo, M. Punch, F. Queiroz, J. Quinn, A. Quirrenbach, P.J. Rajda, R. Rando, S. Razzaque, S. Recchia, P. Reichherzer, O. Reimer, A. Reisenegger, Q. Remy, M. Renaud, T. Reposeur, B. Reville, J.M. Reymond, J. Reynolds, D. Ribeiro, M. Ribo, G. Richards, J. Rico, F. Rieger, L. Riitano, M. Riquelme, D. Riquelme, S. Rivoire, V. Rizi, E. Roache, M. Roche, J. Rodriguez, G. Rodriguez Fernandez, J.C. Rodriguez Ramirez, J.J. Rodriguez Vazquez, G. Rojas, P. Romano, G. Romeo Lobato, C. Romoli, M. Roncadelli, J. Rosado, A. Rosales de Leon, G. Rowell, A. Rugliancich, J.E. Ruiz del Mazo, C. Rulten, C. Russell, F. Russo Hatlen, S. Safi Harb, L. Saha, V. Sahakian, S. Sailer, T. Saito, N. Sakaki, S. Sakurai, G. Salina, H. Salzmann, D. Sanchez, H. Sandaker, A. Sandoval, P. Sangiorgi, M. Sanguillon, H. Sano, M. Santander, A. Santangelo, R. Santos Lima, A. Sanuy, L. Sapozhnikov, T. Saric, S. Sarkar, H. Sasaki, N. Sasaki, Y. Sato, F.G. Saturni, M. Sawada, J. Schaefer, A. Scherer, J. Scherpenberg, P. Schipani, B. Schleicher, J. Schmoll, M. Schneider, H. Schoorlemmer, P. Schovanek, F. Schussler, B. Schwab, U. Schwanke, J. Schwarz, E. Sciacca, S. Scuderi, M. Seglar Arroyo, I. Seitenzahl, D. Semikoz, O. Sergijenko, J.E. Serna Franco, Karol Seweryn, V. Sguera, A. Shalchi, R.Y. Shang, P. Sharma, L. Sidoli, J. Sieiro, H. Siejkowski, A. Sillanpaa, B.B. Singh, K.K. Singh, A. Sinha, C. Siqueira, J. Sitarek, P. Sizun, V. Sliusar, D. Sobczynska, R.W. Sobrinho, H. Sol, G. Sottile, H. Spackman, S. Spencer, G. Spengler, D. Spiga, W. Springer, A. Stamerra, S. Stanic, R. Starling, Ł. Stawarz, Stanislav Stefanik, C. Stegmann, A. Steiner, S. Steinmassl, C. Stella, R. Sternberger, M. Sterzel, C. Stevens, B. Stevenson, T. Stolarczyk, G. Stratta, U. Straumann, J. Striskovic, M. Strzys, R. Stuik, M. Suchenek, Y. Sunada, Tiina Suomijarvi, T. Suric, H. Suzuki, P. Swierk, T. Szepieniec, K. Tachihara, G. Tagliaferri, H. Tajima, N. Tajima, D. Tak, H. Takahashi, M. Takahashi, J. Takata, R. Takeishi, T. Tam, M. Tanaka, T. Tanaka, S. Tanaka, M. Tavani, F. Tavecchio, T. Tavernier, A. Russ Taylor, L.A. Tejedor, P. Temnikov, K. Terauchi, J.C. Terrazas, R. Terrier, T. Terzic, M. Teshima, D. Thibaut, F. Thocquenne, W. Tian, L. Tibaldo, A. Tiengo, M. Tluczykont, C.J. Todero Peixoto, K. Toma, L. Tomankova, J. Tomastik, M. Tornikoski, D.F. Torres, E. Torresi, G. Tosti, L. Tosti, N. Tothill, F. Toussenel, G. Tovmassian, C. Trichard, M. Trifoglio, A. Trois, S. Truzzi, A. Tsiahina, B. Turk, A. Tutone, Y. Uchiyama, P. Utayarat, L. Vaclavek, M. Vacula, V. Vagelli, F. Vagnetti, J.A. Valdivia, M. Valentino, A. Valio, B. Vallage, P. Vallania Quispe, A.M. van den Berg, W. van Driel, C. van Eldik, C. van Rensburg, Brian van Soelen, J. Vandenbroucke, G. Vasileiadis, V. Vassiliev, M. Vazquez Acosta, M. Vecchi, A. Vega, J. Veh, P. Veitch, C. Venter, S. Ventura, S. Vercellone, V. Verguilov, G. Verna, S. Vernetto, V. Verzi, G.P. Vettolani, C. Veyssiere, I. Viale, A. Viana, N. Viaux, J. Vignatti, C.F. Vigorito, J. Villanueva, V. Vitale, V. Vittorini, V. Vodeb, N. Vogel, V. Voisin, S. Vorobiov, M. Vrastil, T. Vuillaume, S.J. Wagner, P. Wagner, K. Wakazono, S.P. Wakely, M. Ward, D. Warren, J. Watson, M. Wechakama, P. Wegner, A. Weinstein, C. Weniger, F. Werner, H. Wetteskind, M. L. White, A. Wierzcholska, S. Wiesand, R. Wijers, M. Wilkinson, M. Will, J. Williams, T. J. Williamson, A. Wolter, Y.W. Wong, M. Wood, T. Yamamoto, H. Yamamoto, Y. Yamane, R. Yamazaki, S. Yanagita, L. Yang, S. Yoo, T. Yoshida, T. Yoshikoshi, P. Yu, A. Yusafzai, Michael Zacharias, B. Zaldivar, L. Zampieri, R. Zanin, R. Zanmar Sanchez, D. Zaric, M. Zavrtanik, D. Zavrtanik, Andrzej Zdziarski, A. Zech, H. Zechlin, A. Zenin, A. Zerwekh, K. Ziętara, A. Zink, J. Ziolkowski, M. Zivec, A. Zmija, Współautorami artykułu są członkowie CTA Observatory, CTA Consortium i LST Collaboration w liczbie 1139, Astronomy, Research unit Nuclear & Hadron Physics, and Research unit Astroparticle Physics
Subjects: Physics, Observatory, Gamma ray, Astronomy
Abstract: Very-high Energy (VHE) gamma-ray astroparticle physics is a relatively young field, and observations over the past decade have surprisingly revealed almost two hundred VHE emitters which appear to act as cosmic particle accelerators. These sources are an important component of the Universe, influencing the evolution of stars and galaxies. At the same time, they also act as a probe of physics in the most extreme environments known - such as in supernova explosions, and around or after the merging of black holes and neutron stars. However, the existing experiments have provided exciting glimpses, but often falling short of supplying the full answer. A deeper understanding of the TeV sky requires a significant improvement in sensitivity at TeV energies, a wider energy coverage from tens of GeV to hundreds of TeV and a much better angular and energy resolution with respect to the currently running facilities. The next generation gamma-ray observatory, the Cherenkov Telescope Array Observatory (CTAO), is the answer to this need. In this talk I will present this upcoming observatory from its design to the construction, and its potential science exploitation. CTAO will allow the entire astronomical community to explore a new discovery space that will likely lead to paradigm-changing breakthroughs. In particular, CTA has an unprecedented sensitivity to short (sub-minute) timescale phenomena, placing it as a key instrument in the future of multi-messenger and multi-wavelength time domain astronomy. I will conclude the talk presenting the first scientific results obtained by the LST-1, the prototype of one CTAO telescope type - the Large-Sized Telescope, that is currently under commission., PoS: Proceedings of Science, 395, ISSN:1824-8039, Proceedings of 37th International Cosmic Ray Conference (ICRC2021)
Published: 2022

18. Cosmic-Ray Boron Flux Measured from 8.4 GeV/n to 3.8 TeV/n with the Calorimetric Electron Telescope on the International Space Station

Author: O, Adriani, Y, Akaike, K, Asano, Y, Asaoka, E, Berti, G, Bigongiari, W R, Binns, M, Bongi, P, Brogi, A, Bruno, J H, Buckley, N, Cannady, G, Castellini, C, Checchia, M L, Cherry, G, Collazuol, G A, de Nolfo, K, Ebisawa, A W, Ficklin, H, Fuke, S, Gonzi, T G, Guzik, T, Hams, K, Hibino, M, Ichimura, K, Ioka, W, Ishizaki, M H, Israel, K, Kasahara, J, Kataoka, R, Kataoka, Y, Katayose, C, Kato, N, Kawanaka, Y, Kawakubo, K, Kobayashi, K, Kohri, H S, Krawczynski, J F, Krizmanic, P, Maestro, P S, Marrocchesi, A M, Messineo, J W, Mitchell, S, Miyake, A A, Moiseev, M, Mori, N, Mori, H M, Motz, K, Munakata, S, Nakahira, J, Nishimura, S, Okuno, J F, Ormes, S, Ozawa, L, Pacini, P, Papini, B F, Rauch, S B, Ricciarini, K, Sakai, T, Sakamoto, M, Sasaki, Y, Shimizu, A, Shiomi, P, Spillantini, F, Stolzi, S, Sugita, A, Sulaj, M, Takita, T, Tamura, T, Terasawa, S, Torii, Y, Tsunesada, Y, Uchihori, E, Vannuccini, J P, Wefel, K, Yamaoka, S, Yanagita, A, Yoshida, K, Yoshida, and W V, Zober
Abstract: We present the measurement of the energy dependence of the boron flux in cosmic rays and its ratio to the carbon flux in an energy interval from 8.4 GeV/n to 3.8 TeV/n based on the data collected by the Calorimetric Electron Telescope (CALET) during ∼6.4 yr of operation on the International Space Station. An update of the energy spectrum of carbon is also presented with an increase in statistics over our previous measurement. The observed boron flux shows a spectral hardening at the same transition energy E_{0}∼200 GeV/n of the C spectrum, though B and C fluxes have different energy dependences. The spectral index of the B spectrum is found to be γ=-3.047±0.024 in the interval 25E200 GeV/n. The B spectrum hardens by Δγ_{B}=0.25±0.12, while the best fit value for the spectral variation of C is Δγ_{C}=0.19±0.03. The B/C flux ratio is compatible with a hardening of 0.09±0.05, though a single power-law energy dependence cannot be ruled out given the current statistical uncertainties. A break in the B/C ratio energy dependence would support the recent AMS-02 observations that secondary cosmic rays exhibit a stronger hardening than primary ones. We also perform a fit to the B/C ratio with a leaky-box model of the cosmic-ray propagation in the Galaxy in order to probe a possible residual value λ_{0} of the mean escape path length λ at high energy. We find that our B/C data are compatible with a nonzero value of λ_{0}, which can be interpreted as the column density of matter that cosmic rays cross within the acceleration region.
Published: 2022

19. Measurement of the Iron Spectrum in Cosmic Rays from 10 GeV$/n$ to 2.0 TeV$/n$ with the Calorimetric Electron Telescope on the International Space Station

Author: O, Adriani, Y, Akaike, K, Asano, Y, Asaoka, E, Berti, G, Bigongiari, W R, Binns, M, Bongi, P, Brogi, A, Bruno, J H, Buckley, N, Cannady, G, Castellini, C, Checchia, M L, Cherry, G, Collazuol, K, Ebisawa, H, Fuke, S, Gonzi, T G, Guzik, T, Hams, K, Hibino, M, Ichimura, K, Ioka, W, Ishizaki, M H, Israel, K, Kasahara, J, Kataoka, R, Kataoka, Y, Katayose, C, Kato, N, Kawanaka, Y, Kawakubo, K, Kobayashi, K, Kohri, H S, Krawczynski, J F, Krizmanic, J, Link, P, Maestro, P S, Marrocchesi, A M, Messineo, J W, Mitchell, S, Miyake, A A, Moiseev, M, Mori, N, Mori, H M, Motz, K, Munakata, S, Nakahira, J, Nishimura, G A, de Nolfo, S, Okuno, J F, Ormes, N, Ospina, S, Ozawa, L, Pacini, P, Papini, B F, Rauch, S B, Ricciarini, K, Sakai, T, Sakamoto, M, Sasaki, Y, Shimizu, A, Shiomi, P, Spillantini, F, Stolzi, S, Sugita, A, Sulaj, M, Takita, T, Tamura, T, Terasawa, S, Torii, Y, Tsunesada, Y, Uchihori, E, Vannuccini, J P, Wefel, K, Yamaoka, S, Yanagita, A, Yoshida, and K, Yoshida
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray acceleration Cosmic ray composition and spectra Cosmic ray propagation Cosmic ray sources Cosmic rays and astroparticles, FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Cosmic rays
Abstract: The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray iron over a wide energy interval. In this Letter a measurement of the iron spectrum is presented in the range of kinetic energy per nucleon from 10 GeV$/n$ to 2.0 TeV$/n$ allowing the inclusion of iron in the list of elements studied with unprecedented precision by space-borne instruments. The measurement is based on observations carried out from January 2016 to May 2020. The CALET instrument can identify individual nuclear species via a measurement of their electric charge with a dynamic range extending far beyond iron (up to atomic number $Z$ = 40). The energy is measured by a homogeneous calorimeter with a total equivalent thickness of 1.2 proton interaction lengths preceded by a thin (3 radiation lengths) imaging section providing tracking and energy sampling. The analysis of the data and the detailed assessment of systematic uncertainties are described and results are compared with the findings of previous experiments. The observed differential spectrum is consistent within the errors with previous experiments. In the region from 50 GeV$/n$ to 2 TeV$/n$ our present data are compatible with a single power law with spectral index -2.60 $\pm$ 0.03., Comment: main text: 7 pages, 4 figures; supplemental material: 10 pages, 12 figures, 1 table. arXiv admin note: text overlap with arXiv:2012.10319
Published: 2021
Full Text: View/download PDF

20. Electroluminescence collection cell as a readout for a high energy resolution Xenon gas TPC

Author: S. Tanaka, Hiroyuki Sekiya, K. Ueshima, Y. Ishiyama, S. Yanagita, S. Ban, Kentaro Miuchi, S. Akiyama, K. Nakamura, M. Hirose, Tsuyoshi Nakaya, A. Minamino, and A. K. Ichikawa
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Q value, FOS: Physical sciences, chemistry.chemical_element, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Optics, Xenon, Double beta decay, 0103 physical sciences, 010306 general physics, Instrumentation, Physics, Scintillation, Time projection chamber, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), chemistry, Scintillation counter, High Energy Physics::Experiment, business, Bar (unit)
Abstract: AXEL is a high pressure xenon gas TPC detector being developed for neutrinoless double-beta decay search. We use the proportional scintillation mode with a new electroluminescence light detection system to achieve high energy resolution in a large detector. The detector also has tracking capabilities, which enable significant background rejection. To demonstrate our detection technique, we constructed a 10L prototype detector filled with up to 10bar xenon gas. The FWHM energy resolution obtained by the prototype detector is 4.0 $\pm$ 0.30 $\%$ at 122 keV, which corresponds to 0.9 ~ 2.0 % when extrapolated to the Q value of the $0\nu\beta\beta$ decay of $^{136}$Xe., Comment: 10 pages
Published: 2017

21. The CALorimetric Electron Telescope (CALET) on the international space station: Results from the first two years on orbit

Author: A. M. Messineo, G. Castellini, A. Sulaj, N. Tateyama, F. Stolzi, Paolo Papini, G. A. de Nolfo, Shunsuke Ozawa, Seiya Ueno, P. Brogi, L. Pacini, Nicola Mori, J. E. Suh, Y. Katayose, Holger Motz, T. G. Guzik, V. Pal'shin, Satoshi Sugita, P. Spillantini, Katsuaki Kasahara, S. Yanagita, K. Hibino, Nobuyuki Hasebe, Chihiro Kato, Y. Kawakubo, Shoji Torii, Ryuho Kataoka, Hideyuki Fuke, Roberta Sparvoli, S. Bonechi, John Mitchell, Henric Krawczynski, N. Cannady, Shoko Miyake, G. Bigongiari, John Krizmanic, M. H. Israel, Kazutaka Yamaoka, A. Shiomi, Kazuoki Munakata, E. Vannuccini, Y. Shimizu, Atsumasa Yoshida, J. F. Ormes, M. Bongi, Yoichi Asaoka, Wataru Ishizaki, Yukio Uchihori, Maria Grazia Bagliesi, H. Tomida, T. Hams, J. Nishimura, Emanuele Berti, Kenji Yoshida, M. Ichimura, T. Lomtadze, G. Collazuol, Toshio Terasawa, Katsuaki Asano, H. Murakami, C. Checchia, Yoshiki Tsunesada, W. R. Binns, Kazunori Kohri, K. Sakai, V. Di Felice, Alexander Moiseev, J. Kataoka, A. Bruno, A. V. Penacchioni, T. Tamura, Manami Sasaki, J. H. Buckley, O. Adriani, Kunihito Ioka, T. Sakamoto, Masato Takita, Y Akaike, I. Takahashi, S. B. Ricciarini, Michael Cherry, Masaki Mori, Satoshi Nakahira, K. Mori, P. Maestro, Brian Rauch, M. Takayanagi, John P. Wefel, Norita Kawanaka, F. Palma, Ken Ebisawa, S. Okuno, and P. S. Marrocchesi
Subjects: History, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, astro-ph.HE, International Space stations, 01 natural sciences, 7. Clean energy, Education, law.invention, Telescope, Positron, law, 0103 physical sciences, International Space Station, Gamma-ray observations, 010306 general physics, 010303 astronomy & astrophysics, Settore FIS/01, High Energy Astrophysical Phenomena (astro-ph.HE), Astroparticle physics, Physics, Cosmic ray electrons, Gravitational wave, Gamma rays, Astronomy, LIGO, Computer Science Applications, Particle acceleration, Astrophysics - High Energy Astrophysical Phenomena, Telescopes
Abstract: The CALorimetric Electron Telescope (CALET) is a high-energy astroparticle physics space experiment installed on the International Space Station (ISS), developed and operated by Japan in collaboration with Italy and the United States. The CALET mission goals include the investigation of possible nearby sources of high-energy electrons, of the details of galactic particle acceleration and propagation, and of potential signatures of dark matter. CALET measures the cosmic-ray electron + positron flux up to 20 TeV, gamma-rays up to 10 TeV, and nuclei with Z=1 to 40 up to 1,000 TeV for the more abundant elements during a long-term observation aboard the ISS. Starting science operation in mid-October 2015, CALET performed continuous observation without major interruption with close to 20 million triggered events over 10 GeV per month. Based on the data taken during the first two-years, we present an overview of CALET observations: uses w/o major interruption 1) Electron + positron energy spectrum, 2) Nuclei analysis, 3) Gamma-ray observation including a characterization of on-orbit performance. Results of the electromagnetic counterpart search for LIGO/Virgo gravitational wave events are discussed as well., 10 pages, 10 figures, a contribution to the proceedings of 26th Extended European Cosmic Ray Symposium, 6-10 July 2018, Russia, which summarizes our recent publications such as arXiv:1712.01711, arXiv:1712.01757, arXiv:1803.05834, arXiv:1806.09728, and arXiv:1807.01435
Published: 2019

22. Search for GeV Gamma-Ray Counterparts of Gravitational Wave Events by CALET

Author: Emanuele Berti, Toshio Terasawa, R. Sparvoli, L. Pacini, J. Kataoka, T. Sakamoto, A. V. Penacchioni, A. M. Messineo, T. G. Guzik, O. Adriani, S. Miyake, Kunihito Ioka, A. A. Moiseev, G. Collazuol, K. Sakai, Satoshi Nakahira, I. Takahashi, S. B. Ricciarini, F. Stolzi, Y. Tsunesada, T. Lomtadze, Gabriele Bigongiari, K. Ebisawa, John Mitchell, W. R. Binns, A. Yoshida, Katsuaki Asano, Yoichi Asaoka, Seiya Ueno, P. Spillantini, J. E. Suh, Norita Kawanaka, Y. Shimizu, Holger Motz, Y. Akaike, P. Papini, J. F. Krizmanic, Michael Cherry, Y. Kawakubo, J. F. Ormes, K. Hibino, Masaki Mori, M. Bongi, S. Yanagita, F. Palma, M. Takayanagi, Ryuho Kataoka, H. Murakami, S. Bonechi, S. Ozawa, E. Vannuccini, Maria Grazia Bagliesi, N. Cannady, A. Shiomi, K. Kasahara, V. Di Felice, N. Hasebe, M. Sasaki, G. A. de Nolfo, K. Mori, C. Checchia, T. Hams, T. Tamura, J. H. Buckley, Masato Takita, J. Nishimura, Paolo Maestro, W. Ishizaki, Chihiro Kato, Shoji Torii, Brian Rauch, Kazunori Kohri, M. Hareyama, M. H. Israel, Kazuoki Munakata, Kenji Yoshida, Y. Katayose, Kazutaka Yamaoka, J. P. Wefel, H. Tomida, Henric Krawczynski, M. Ichimura, G. Castellini, A. Sulaj, N. Tateyama, P. S. Marrocchesi, H. Fuke, Paolo Brogi, S. Okuno, N. Mori, and Y. Uchihori
Subjects: Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Electron, Astrophysics, NEUTRON-STAR MERGERS, 01 natural sciences, gamma rays: general, gravitational waves, methods: observational, Luminosity, GW170817, 0103 physical sciences, GW151226, BURSTS, Sensitivity (control systems), 010306 general physics, SIGNATURES, BLACK-HOLE MERGERS, EMISSION, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, gamma rays: general, gravitational waves, methods: observational, 010308 nuclear & particles physics, Gravitational wave, Settore FIS/04, Gamma ray, Order (ring theory), Astronomy and Astrophysics, LIGO, Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena
Abstract: 著者人数: 91名(所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 海老沢, 研; 福家, 英之; 森, 国城; 西村, 純; 高柳, 昌弘; 冨田, 洋; 上野, 史郎), Number of authors: 91(Affiliation. Institute of Space and Atronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS): Ebisawa, Ken; Fuke, Hideyuki; Mori, Kunishiro; Nishimura, Jun; Takayanagi, Masahiro; Tomida, Hiroshi; Ueno, Shiro), Accepted: 2018-07-03, 資料番号: SA1180102000
Published: 2018

23. On-orbit operations and offline data processing of CALET onboard the ISS

Author: N. Mori, Y. Uchihori, F. Stolzi, Y. Shimizu, J. F. Ormes, M. Bongi, S. Ozawa, K. Hibino, A. V. Penacchioni, O. Adriani, Kunihito Ioka, S. Yanagita, Brian Rauch, M. Ichimura, R. Sparvoli, Henric Krawczynski, Y. Katayose, K. Kasahara, N. Hasebe, Seiya Ueno, K. Sakai, T. Sakamoto, P. Spillantini, J. P. Wefel, G. Collazuol, G. A. de Nolfo, Paolo Maestro, M. Takayanagi, Norita Kawanaka, F. Palma, T. G. Guzik, A. Javaid, T. Lomtadze, Y. Tsunesada, Gabriele Bigongiari, A. Yoshida, T. Hams, K. Mori, P. Papini, J. Nishimura, Kenji Yoshida, T. Tamura, Shoji Torii, J. H. Buckley, Holger Motz, Toshio Terasawa, H. Murakami, A. A. Moiseev, Masato Takita, M. H. Israel, S. Bonechi, V. Di Felice, Kazutaka Yamaoka, J. Kataoka, W. R. Binns, Y. Akaike, C. Checchia, M. Hareyama, Kazuoki Munakata, G. Castellini, H. Tomida, N. Tateyama, Satoshi Nakahira, E. Vannuccini, Maria Grazia Bagliesi, W. Ishizaki, K. Ebisawa, T. Yuda, S. Miyake, John Mitchell, J. F. Krizmanic, Michael Cherry, A. Shiomi, Masaki Mori, K. Mizutani, Yoichi Asaoka, M. Sasaki, I. Takahashi, S. B. Ricciarini, A. M. Messineo, H. Fuke, Paolo Brogi, S. Okuno, Katsuaki Asano, Ryuho Kataoka, N. Cannady, Shuichi Kuramata, Chihiro Kato, P. S. Marrocchesi, Y. Kawakubo, and L. Pacini
Subjects: Physics - Instrumentation and Detectors, 010504 meteorology & atmospheric sciences, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, CALET, 01 natural sciences, law.invention, Telescope, Data acquisition, law, 0103 physical sciences, International Space Station, Direct measurement, Geomagnetic latitude, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 0105 earth and related environmental sciences, Physics, Settore FIS/01, Calorimeter, Ground support equipment, International space station, Gamma ray, Astronomy, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Earth's magnetic field, Cosmic-ray electrons, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: 著者人数: 91名（所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 海老沢, 研; 福家, 英之; 森, 國城; 西村, 純; 高柳, 昌弘; 上野, 史郎), Accepted: 2018-02-26, 資料番号: SA1170331000
Published: 2018

24. Functional RET G691S polymorphism in cutaneous malignant melanoma

Author: Donald L. Morton, KK Chong, Richard A. Scolyer, S Yanagita, Takaaki Arigami, Norihiko Narita, Atsushi Tanemura, S S H Huang, Dave S.B. Hoon, John F. Thompson, and Rajmohan Murali
Subjects: Proto-Oncogene Proteins B-raf, Cancer Research, Glial Cell Line-Derived Neurotrophic Factor Receptors, Skin Neoplasms, medicine.disease_cause, Proto-Oncogene Mas, Article, Receptor tyrosine kinase, polymorphism, BRAF, 03 medical and health sciences, 0302 clinical medicine, Cell Movement, Cell Line, Tumor, melanoma, Genetics, medicine, Glial cell line-derived neurotrophic factor, Humans, Neoplasm Invasiveness, Glial Cell Line-Derived Neurotrophic Factor, Phosphorylation, Extracellular Signal-Regulated MAP Kinases, neoplasms, Molecular Biology, Protein kinase B, Cell Proliferation, 030304 developmental biology, 0303 health sciences, Polymorphism, Genetic, biology, Melanoma, Proto-Oncogene Proteins c-ret, medicine.disease, Immunohistochemistry, Actins, desmoplastic, Tumor progression, 030220 oncology & carcinogenesis, Cutaneous melanoma, biology.protein, Cancer research, mutation, RET, Carcinogenesis, Proto-Oncogene Proteins c-akt
Abstract: RET proto-oncogene encodes a receptor tyrosine kinase whose ligand is glial cell line-derived neurotrophic factor (GDNF), and its polymorphism at G691S juxtamembrane region (RETp) is a germline polymorphism. Cutaneous melanomas, particularly the desmoplastic subtype, are highly neurotropic; thus we sought to determine the frequency of RETp in cutaneous melanoma and its functional responsiveness to GDNF. RETp was assessed in 71 non-desmoplastic cutaneous melanomas (non-DMs) and 70 desmoplastic melanomas (DMs). Melanoma cell lines with RETp, RET wild-type (RETwt), BRAF V600E mutation (BRAFmt) or BRAF wild-type (BRAFwt) were assessed for functional activity. RETp frequency was significantly higher in DMs (61%) than in non-DMs (31%, P
Published: 2009

25. Observation of Very High Energy Gamma Rays from HESS J1804−216 with CANGAROO‐III Telescopes

Author: Y. Higashi, H. Kubo, T. Yoshida, R. Enomoto, T. Tanimori, P. G. Edwards, T. Naito, G. V. Bicknell, R. W. Clay, S. Gunji, S. Hara, T. Hara, T. Hattori, S. Hayashi, Y. Hirai, K. Inoue, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, J. Kushida, Y. Matsubara, T. Mizukami, Y. Mizumoto, R. Mizuniwa, M. Mori, H. Muraishi, Y. Muraki, T. Nakamori, S. Nakano, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, E. Yamazaki, S. Yanagita, T. Yoshikoshi, and Y. Yukawa
Subjects: Physics, High energy, Photon, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Hadron, Gamma ray, FOS: Physical sciences, Flux, Astronomy and Astrophysics, Astrophysics, Radiation, Pulsar wind nebula, Space and Planetary Science, High Energy Physics::Experiment, Supernova remnant
Abstract: We observed the unidentified TeV gamma-ray source HESS J1804-216 with the CANGAROO-III atmospheric Cerenkov telescopes from May to July in 2006. We detected very high energy gamma rays above 600 GeV at the 10 sigma level in an effective exposure of 76 hr. We obtained a differential flux of (5.0+/-1.5_{stat}+/-1.6_{sys})\times 10^{-12}(E/1 TeV)^{-\alpha} cm^{-2}s^{-1}TeV^{-1} with a photon index \alpha of 2.69 +/- 0.30_{stat} +/- 0.34_{sys}, which is consistent with that of the H.E.S.S. observation in 2004. We also confirm the extended morphology of the source. By combining our result with multi-wavelength observations, we discuss the possible counterparts of HESS J1804-216 and the radiation mechanism based on leptonic and hadronic processes for a supernova remnant and a pulsar wind nebula., Comment: 11 pages, 12 figures, Accepted in ApJ
Published: 2008

26. Observation of an Extended Very High Energy Gamma‐Ray Emission from MSH 15‐52 with CANGAROO‐III

Author: T. Nakamori, H. Kubo, T. Yoshida, T. Tanimori, R. Enomoto, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, S. Hayashi, Y. Higashi, Y. Hirai, K. Inoue, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, J. Kushida, Y. Matsubara, T. Mizukami, Y. Mizumoto, R. Mizuniwa, M. Mori, H. Muraishi, Y. Muraki, T. Naito, S. Nakano, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, E. Yamazaki, S. Yanagita, T. Yoshikoshi, and Y. Yukawa
Subjects: Physics, High energy, Photon, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Flux, Astronomy and Astrophysics, Astrophysics, Cherenkov Telescope Array, Pulsar, Space and Planetary Science, High Energy Physics::Experiment, Spectral analysis, Supernova remnant
Abstract: We have observed the supernova remnant MSH 15-52 (G320.4-1.2), which contains the gamma-ray pulsar PSR B1509-58, using the CANGAROO-III imaging atmospheric Cherenkov telescope array from April to June in 2006. We detected gamma rays above 810 GeV at the 7 sigma level during a total effective exposure of 48.4 hours. We obtained a differential gamma-ray flux at 2.35 TeV of (7.9+/-1.5_{stat}+/-1.7_{sys}) \times 10^{-13} cm^{-2}s^{-1}TeV^{-1} with a photon index of 2.21+/-0.39_{stat}+/-0.40_{sys}, which is compatible with that of the H.E.S.S. observation in 2004. The morphology shows extended emission compared to our Point Spread Function. We consider the plausible origin of the high energy emission based on a multi-wavelength spectral analysis and energetics arguments.
Published: 2008

27. CANGAROO‐III Search for Gamma Rays from SN 1987A and the Surrounding Field

Author: R. Enomoto, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hattori, S. Hayashi, Y. Higashi, Y. Hirai, K. Inoue, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, H. Kubo, J. Kushida, T. Mizukami, R. Mizuniwa, M. Mori, H. Muraishi, T. Naito, T. Nakamori, S. Nakano, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, T. Tanimori, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, E. Yamazaki, S. Yanagita, T. Yoshida, T. Yoshikoshi, and Y. Yukawa
Subjects: Shock wave, Physics, Brightness, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Gamma ray, FOS: Physical sciences, Flux, Astronomy and Astrophysics, Astrophysics, Charged particle, Supernova, Pulsar, Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, Supernova remnant, Astrophysics::Galaxy Astrophysics
Abstract: Optical images of SN 1987A show a triple ring structure. The inner (dust) ring has recently increased in brightness and in the number of hot spots suggesting that the supernova shock wave has collided with the dense pre-existing circumstellar medium, a scenario supported by radio and X-ray observations. Such a shocked environment is widely expected to result in the acceleration of charged particles, and the accompanying emission of very high energy gamma-rays. Here, we report the results of observations made in 2004 and 2006 which yield upper limits on the TeV gamma-ray flux, which are compared with a theoretical prediction. In addition, we set upper limits on the TeV flux for four high energy objects which are located within the same field of view of the observation: the super-bubble 30 Dor C, the Crab-like pulsar PSR B0540$-$69, the X-ray binary LMC X-1, and the supernova remnant N157B., Comment: 5 pages, 5 figures, Accepted for publication in ApJ
Published: 2007

28. Detection of Gamma Rays around 1 TeV from RX J0852.0-4622 by CANGAROO-II

Author: H. Katagiri, R. Enomoto, L. T. Ksenofontov, M. Mori, Y. Adachi, A. Asahara, G. V. Bicknell, R. W. Clay, Y. Doi, P. G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, Sei. Hayashi, C. Itoh, S. Kabuki, F. Kajino, A. Kawachi, T. Kifune, R. Kiuchi, H. Kubo, T. Kurihara, R. Kurosaka, J. Kushida, Y. Matsubara, Y. Miyashita, Y. Mizumoto, H. Muraishi, Y. Muraki, T. Naito, T. Nakamori, T. Nakase, D. Nishida, K. Nishijima, M. Ohishi, K. Okumura, J. R. Patterson, R. J. Protheroe, N. Sakamoto, Y. Sakamoto, D. L. Swaby, T. Tanimori, H. Tanimura, G. J. Thornton, K. Tsuchiya, S. Watanabe, T. Yamaoka, S. Yanagita, T. Yoshida, and T. Yoshikoshi
Subjects: Physics, Astrophysics (astro-ph), Gamma ray, Centroid, Flux, FOS: Physical sciences, Astronomy and Astrophysics, IACT, Astrophysics, Signal, law.invention, Telescope, Space and Planetary Science, law, Supernova remnant, Cherenkov radiation
Abstract: 著者人数: 51名, Accepted: 2004-12-10, 資料番号: SA1003414000
Published: 2005

29. Detection of Sub-TeV Gamma Rays from the Galactic Center Direction by CANGAROO-II

Author: K. Tsuchiya, R. Enomoto, L. T. Ksenofontov, M. Mori, T. Naito, A. Asahara, G. V. Bicknell, R. W. Clay, Y. Doi, P. G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, Sei. Hayashi, C. Itoh, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, H. Kubo, T. Kurihara, R. Kurosaka, J. Kushida, Y. Matsubara, Y. Miyashita, Y. Mizumoto, H. Moro, H. Muraishi, Y. Muraki, T. Nakase, D. Nishida, K. Nishijima, M. Ohishi, K. Okumura, J. R. Patterson, R. J. Protheroe, N. Sakamoto, K. Sakurazawa, D. L. Swaby, T. Tanimori, H. Tanimura, G. Thornton, F. Tokanai, T. Uchida, S. Watanabe, T. Yamaoka, S. Yanagita, T. Yoshida, and T. Yoshikoshi
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Galactic Center, Astrophysics (astro-ph), Gamma ray, Flux, FOS: Physical sciences, Astronomy and Astrophysics, IACT, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Spectral line, High Energy Physics - Experiment, law.invention, Telescope, Galactic halo, High Energy Physics - Experiment (hep-ex), Space and Planetary Science, law, Cherenkov radiation, Astrophysics::Galaxy Astrophysics
Abstract: 著者人数: 51名, Accepted: 2004-03-24, 資料番号: SA1003408000
Published: 2004

30. Coincidence Doppler broadening and 3DAP study of the pre-precipitation stage of an Al–Li–Cu–Mg–Ag alloy

Author: Masuyuki Hasegawa, T. Honma, Kazuhiro Hono, S. Yanagita, and Yasuyoshi Nagai
Subjects: Materials science, Polymers and Plastics, Precipitation (chemistry), Alloy, Metals and Alloys, Analytical chemistry, Atom probe, engineering.material, Electronic, Optical and Magnetic Materials, law.invention, Crystallography, Electron diffraction, Transmission electron microscopy, law, Vickers hardness test, Ceramics and Composites, engineering, Spectroscopy, Doppler broadening
Abstract: Pre-precipitation solute clustering in Al–Li–Cu–Mg–Ag and Al–Cu–Mg–Ag alloys has been investigated by coincidence Doppler broadening (CDB) spectroscopy of positron annihilation and three-dimensional atom probe (3DAP) analysis. Although Ag–Mg co-clusters form in the Al–Cu–Mg–Ag alloy in the early stage of aging, no evidence for the co-cluster formation was obtained from the Li containing alloy using 3DAP. While CDB spectra indicated that vacancies are associated with Ag after aging for 15 s in the Al–Cu–Mg–Ag alloy, vacancy–Ag association is suppressed in the Li containing alloy. Based on the 3DAP and CDB results, the reasons for the completely different clustering behaviors observed in these two similar alloys are discussed.
Published: 2004

31. A Search for TeV Gamma Rays from SN 1987A in 2001

Author: R. Enomoto, L. T. Ksenofontov, H. Katagiri, K. Tsuchiya, A. Asahara, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hara, H. Hattori, Sei. Hayashi, Shin. Hayashi, C. Itoh, S. Kabuki, F. Kajino, A. Kawachi, T. Kifune, H. Kubo, J. Kushida, Y. Matsubara, Y. Mizumoto, M. Mori, H. Moro, H. Muraishi, Y. Muraki, T. Naito, T. Nakase, D. Nishida, K. Nishijima, M. Ohishi, K. Okumura, J. R. Patterson, R. J. Protheroe, K. Sakurazawa, D. L. Swaby, T. Tanimori, F. Tokanai, H. Tsunoo, T. Uchida, A. Watanabe, S. Watanabe, S. Yanagita, T. Yoshida, and T. Yoshikoshi
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Gamma ray, Theoretical models, FOS: Physical sciences, Flux, Astronomy and Astrophysics, Astrophysics, Luminosity, law.invention, Telescope, Supernova, Space and Planetary Science, law, Cherenkov radiation, Zenith
Abstract: 著者人数: 46名, Accepted: 2003-05-20, 資料番号: SA1003406000
Published: 2003

32. Precipitation of Cu in Fe–Cu alloys by high-speed deformation

Author: Masao Komatsu, S. Yanagita, Qiu Xu, T. Ishizaki, Koichi Sato, M. Kiritani, and Toshimasa Yoshiie
Subjects: Materials science, Precipitation (chemistry), Mechanical Engineering, Metallurgy, technology, industry, and agriculture, Analytical chemistry, Strain rate, Condensed Matter Physics, Homogeneous distribution, Positron annihilation spectroscopy, Mechanics of Materials, Transmission electron microscopy, Vacancy defect, General Materials Science, Dislocation, Doppler broadening
Abstract: The differences between defect structures in Fe–Cu alloys deformed at the high (4.3×10 5 s −1 ) and the low strain rate (67 s −1 ) were studied. Positron lifetime and coincidence Doppler broadening (CDB) measurements were carried out to investigate the formation of vacancy clusters and Cu precipitates. Both the size of vacancy clusters and the total amount of vacancy-type defects were larger after high-speed deformation at room temperature. Cu precipitation in the specimen deformed at the high-speed stopped for 10 h after annealing at 400 °C, while that in the specimen deformed at the low-speed continued for 100 h. Transmission electron microscopy (TEM) observations showed a heterogeneous distribution of dislocations in the case of low-speed deformation but a homogeneous distribution in the case of high-speed deformation. These results suggested that the sink efficiency for defects was higher in the specimen deformed at the high-speed.
Published: 2003

33. A new materials irradiation facility at the Kyoto university reactor

Author: Toshimasa Yoshiie, Yoshihiko Hayashi, Seiji Shiroya, H Tsujimoto, Qiu Xu, S. Yanagita, Yuhki Satoh, T Kozuka, K Kamae, Masahiko Utsuro, Katsuhei Kobayashi, Kaichiro Mishima, and Yoshiaki Fujita
Subjects: Physics, irradiation damage, Nuclear and High Energy Physics, Nuclear engineering, irradiation facility, technology, industry, and agriculture, New materials, neutron spectrum, reactor neutrons, materials controlled irradiation, Helium pressure, Neutron, Irradiation, Fission neutron, Instrumentation
Abstract: A new materials irradiation facility with improved control capabilities has been installed at the Kyoto University Reactor (KUR). Several deficiencies of conventional fission neutron material irradiation systems have been corrected. The specimen temperature is controlled both by an electric heater and by the helium pressure in the irradiation tube without exposure to neutrons at temperatures different from the design test conditions. The neutron spectrum is varied by the irradiation position. Irradiation dose is changed by pulling the irradiation capsule up and down during irradiation. Several characteristics of the irradiation field were measured. The typical irradiation intensity is 9.4×10 12 n/cm 2 s (>0.1 MeV) and the irradiation temperature of specimens is controllable from 363 to 773 K with a precision of ±2 K.
Published: 2003

34. Design study of CANGAROO-III, stereoscopic imaging atmospheric Cherenkov telescopes for sub-TeV γ-ray detection

Author: R Enomoto, S Hara, A Asahara, G.V Bicknell, P.G Edwards, S Gunji, T Hara, J Jimbo, F Kajino, H Katagiri, J Kataoka, A Kawachi, T Kifune, H Kubo, J Kushida, Y Matsubara, Y Mizumoto, M Mori, M Moriya, H Muraishi, Y Muraki, T Naito, T Nakase, K Nishijima, K Okumura, J.R Patterson, K Sakurazawa, D.L Swaby, K Takano, T Tanimori, T Tamura, K Tsuchiya, K Uruma, S Yanagita, T Yoshida, T Yoshikoshi, and A Yuki
Subjects: Stereoscopic imaging, Physics, Pixel, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy and Astrophysics, IACT, Astrophysics, law.invention, Telescope, Optics, law, Design study, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, business, Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: CANGAROO-III is an Imaging Atmospheric Cherenkov Telescope (IACT) array of four 10 m telescopes for very high energy (sub-TeV) gamma-ray astronomy. A design study of the CANGAROO-III telescope system was carried out using the Monte Carlo technique in order to optimize the pixel size and the telescope spacing. Studies were also made of observations at low elevation angles.
Published: 2002

35. Model Calculation of the Damage Rate Dependence of Yield Stress Change in an Irradiated Fe-Cu Model Alloy

Author: Hiromitsu Ino, S. Yanagita, Toshimasa Yoshiie, and Qiu Xu
Subjects: Materials science, Alloy, Nucleation, Thermodynamics, chemistry.chemical_element, yield stress change, engineering.material, Instability, model calculation, copper-vacancy binding, General Materials Science, Irradiation, radiation effect, damage rate dependence, Mechanical Engineering, point defect cluster, Condensed Matter Physics, Radiation effect, Copper, Crystallography, chemistry, Mechanics of Materials, Cascade, Thermal dissociation, engineering, iron-copper alloy, sense organs
Abstract: The damage rate dependence of the yield stress change in a neutron-irradiated Fe–Cu model alloy was analyzed by a model calculation. The model was based on the rate theory, and focused on the description of the nucleation and growth of point defect clusters and copper clusters. The binding between copper atoms and vacancies and the effect of cascade damage which directly creates small point defect clusters were incorporated in this model. The instability of small point defect clusters caused by thermal dissociation was also included. From the result of the calculation, the yield stress changes were estimated using the Orowan model and the Russel-Brown model. As a result of this calculation, it was clarified that copper clusters are the main factor of yield stress change in almost all irradiation stages below 0.1 dpa. The contribution of copper clusters to yield stress change increased with decreasing damage rate. The nature of the damage rate dependence is not affected by the copper-vacancy binding but by the sink strength, which changes dynamically throughout irradiation.
Published: 2002

36. Detection of Gamma Rays of up to 50 T[CLC]e[/CLC]V from the Crab Nebula

Author: T. Tanimori, K. Sakurazawa, S. A. Dazeley, P. G. Edwards, T. Hara, Y. Hayami, S. Kamei, T. Kifune, T. Konishi, Y. Matsubara, T. Matsuoka, Y. Mizumoto, A. Masaike, M. Mori, H. Muraishi, Y. Muraki, T. Naito, S. Oda, S. Ogio, T. Osaki, J. R. Patterson, M. D. Roberts, G. P. Rowell, A. Suzuki, R. Suzuki, T. Sako, T. Tamura, G. J. Thornton, R. Susukita, S. Yanagita, T. Yoshida, and T. Yoshikoshi
Subjects: Physics, Nebula, Photon, Proton, Crab Pulsar, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astronomy and Astrophysics, Astrophysics, Particle acceleration, Crab Nebula, Pulsar, Space and Planetary Science, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract: Gamma rays with energies greater than 7 TeV from the Crab pulsar/nebula have been observed at large zenith angles, using the Imaging Atmospheric Technique from Woomera, South Australia. CANGAROO data taken in 1992, 1993 and 1995 indicate that the energy spectrum extends up to at least 50 TeV, without a change of the index of the power law spectrum. The observed differential spectrum is \noindent $(2.01\pm 0.36)\times 10^{-13}(E/{7 TeV})^{-2.53 \pm 0.18} TeV^{-1}cm^{-2}s^{-1}$ between 7 TeV and 50 TeV. There is no apparent cut-off. The spectrum for photon energies above $\sim$10 TeV allows the maximum particle acceleration energy to be inferred, and implies that this unpulsed emission does not originate near the light cylinder of the pulsar, but in the nebula where the magnetic field is not strong enough to allow pair creation from the TeV photons. The hard gamma-ray energy spectrum above 10 TeV also provides information about the varying role of seed photons for the inverse Compton process at these high energies, as well as a possible contribution of $\pi ^{\circ}$-gamma rays from proton collisions.
Published: 1998

37. CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518

Author: Y. Yukawa, Michiko Ohishi, Yutaka Matsubara, Shigeto Kabuki, Ken'ichi Tsuchiya, Ryoji Enomoto, Fuyuki Tokanai, Takanori Yoshikoshi, Hiroshi Muraishi, R. Kiuchi, Shuichi Gunji, Y. Yokoe, Toru Tanimori, S. Hayashi, H. Ishioka, S. Ryoki, Y. Mizumura, Philip G. Edwards, I. Matsuzawa, Shinji Hara, M. Akimoto, Hideaki Katagiri, D. L. Swaby, Y. Otake, Kazunori Nakayama, T. Matoba, S. Yanagita, A. Kawachi, G. J. Thornton, K. Saito, Hidetoshi Kubo, Takeshi Nakamori, Geoffrey V. Bicknell, Kyoshi Nishijima, Y. Mizumoto, T. Mizukami, Victor Stamatescu, Masaki Mori, Tsuguya Naito, Toshikazu Suzuki, F. Kajino, Roger W Clay, Tatsuo Yoshida, Y. Toyota, Tadashi Kifune, Y. Sakamoto, T. Kunisawa, J. Kushida, and T. Hara
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Photon, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galactic plane, Cherenkov Telescope Array, Pulsar wind nebula, Stars, Pulsar, Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, High Energy Physics::Experiment, Supernova remnant, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract: We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was discovered in the H.E.S.S. Galactic plane survey. Diffuse gamma-ray emission was detected above 760 GeV at the 8.9 sigma level during an effective exposure of 54 hr from 2008 May to August. The spectrum can be represented by a power-law: 8.2+-2.2_{stat}+-2.5_{sys}x10^{-12}x (E/1TeV)^{-Gamma} cm^{-2} s^{-1} TeV^{-1} with a photon index Gamma of 2.4+-0.3_{stat}+-0.2_{sys}, which is compatible with that of the H.E.S.S. observations. By combining our result with multi-wavelength data, we discuss the possible counterparts for HESS J1614-518 and consider radiation mechanisms based on hadronic and leptonic processes for a supernova remnant, stellar winds from massive stars, and a pulsar wind nebula. Although a leptonic origin from a pulsar wind nebula driven by an unknown pulsar remains possible, hadronic-origin emission from an unknown supernova remnant is preferred., 9 pages, 7 figures, accepted for publication in ApJ
Published: 2011

38. CANGAROO-III search for TeV Gamma-rays from two clusters of galaxies

Author: Yasushi Muraki, S. Yanagita, Ken'ichi Tsuchiya, S. Hara, Geoffrey V. Bicknell, Tatsuo Yoshida, A. Seki, K. Nishijima, Y. Sakamoto, Y. Hirai, Fuyuki Tokanai, S. Hayashi, Philip G. Edwards, C. Itoh, J. Kushida, Victor Stamatescu, Hideaki Katagiri, Hiroshi Muraishi, Ryoji Enomoto, Tsuguya Naito, Toshikazu Suzuki, Masaki Mori, Toru Tanimori, R. Kiuchi, Roger W Clay, Kunio Inoue, T. Hattori, D. Nishida, Hidetoshi Kubo, Tadashi Kifune, Y. Yamada, Takanori Yoshikoshi, Takeshi Nakamori, T. Hara, Y. Mizumoto, Michiko Ohishi, Yusuke Higashi, Y. Yukawa, F. Kajino, S. Nakano, Yutaka Matsubara, D. L. Swaby, Shuichi Gunji, Shin Watanabe, G. J. Thornton, E. Yamazaki, Shigeto Kabuki, R. Mizuniwa, T. Mizukami, and Akiko Kawachi
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Cosmic microwave background, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Accretion (astrophysics), Space and Planetary Science, Cluster (physics), Astrophysics - High Energy Astrophysical Phenomena, Galaxy cluster, Cherenkov radiation, Astrophysics::Galaxy Astrophysics
Abstract: Because accretion and merger shocks in clusters of galaxies may accelerate particles to high energies, clusters are candidate sites for the origin of ultra-high-energy (UHE) cosmic-rays. A prediction was presented for gamma-ray emission from a cluster of galaxies at a detectable level with the current generation of imaging atmospheric Cherenkov telescopes. The gamma-ray emission was produced via inverse Compton upscattering of cosmic microwave background (CMB) photons by electron-positron pairs generated by collisions of UHE cosmic rays in the cluster. We observed two clusters of galaxies, Abell 3667 and Abell 4038, searching for very-high-energy gamma-ray emission with the CANGAROO-III atmospheric Cherenkov telescope system in 2006. The analysis showed no significant excess around these clusters, yielding upper limits on the gamma-ray emission. From a comparison of the upper limit for the north-west radio relic region of Abell 3667 with a model prediction, we derive a lower limit for the magnetic field of the region of ~0.1 micro G. This shows the potential of gamma-ray observations in studies of the cluster environment. We also discuss the flux upper limit from cluster center regions using a model of gamma-ray emission from neutral pions produced in hadronic collisions of cosmic-ray protons with the intra-cluster medium (ICM). The derived upper limit of the cosmic-ray energy density within this framework is an order of magnitude higher than that of our Galaxy., 7 pages, 6 figures, Accepted in ApJ
Published: 2009

39. TeV observations of Centaurus A

Author: Yasushi Muraki, Hiroshi Muraishi, Tadashi Kifune, M. D. Roberts, Shuichi Gunji, Jamie Holder, Tatsuo Yoshida, S. Yanagita, T. Hara, Toru Tanimori, Takanori Yoshikoshi, S. A. Dazeley, Shoichi Ogio, R. Susukita, T. Tamura, J. R. Patterson, Tsuguya Naito, Gavin Rowell, Masaki Mori, Yoshihiko Mizumoto, Philip G. Edwards, Yutaka Matsubara, Takashi Sako, K. Sakurazawa, Kyoshi Nishijima, A. Kawachi, and G. J. Thornton
Subjects: Physics, Photon, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Centaurus A, FOS: Physical sciences, Flux, Astronomy and Astrophysics, Astrophysics, Radius, law.invention, Telescope, law, High Energy Physics::Experiment
Abstract: We have searched for TeV gamma-rays from Centaurus A and surrounding region out to +/- 1.0 deg using the CANGAROO 3.8m telescope. No evidence for TeV gamma-ray emission was observed from the search region, which includes a number of interesting features located away from the tracking centre of our data. The 3 sigma upper limit to the flux of gamma-rays above 1.5 TeV from an extended source of radius 14' centred on Centaurus A is 1.28e-11 photons cm^-2 s^-1., 4 pages. Astroparticle Physics, accepted for publication. Some upper limits overestimated by factor 2-4 in original version astro-ph/9901316. Now corrected
Published: 1999

40. CANGAROO-III Search for Gamma Rays from Kepler's Supernova Remnant

Author: R. Enomoto, Y. Higashi, T. Yoshida, T. Tanimori, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, S. Hayashi, Y. Hirai, K. Inoue, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, H. Kubo, J. Kushida, Y. Matsubara, T. Mizukami, Y. Mizumoto, R. Mizuniwa, M. Mori, H. Muraishi, Y. Muraki, T. Naito, T. Nakamori, S. Nakano, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, E. Yamazaki, S. Yanagita, T. Yoshikoshi, and Y. Yukawa
Subjects: Physics, Infrared, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Gamma ray, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Kepler, law.invention, Telescope, Supernova, Space and Planetary Science, law, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Supernova remnant, Cherenkov radiation, Astrophysics::Galaxy Astrophysics
Abstract: Kepler's supernova, discovered in October 1604, produced a remnant that has been well studied observationally in the radio, infrared, optical, and X-ray bands, and theoretically. Some models have predicted a TeV gamma-ray flux that is detectable with current Imaging Cherenkov Atmospheric Telescopes. We report on observations carried out in 2005 April with the CANGAROO-III telescope. No statistically significant excess was observed, and limitations on the allowed parameter range in the model are discussed., 6 pages 6 figures, to appear in ApJ, August 20, 2008, v683n2
Published: 2008

41. Neutron Irradiation Rate Dependence of Damage Structures in Fe-Cu Model Alloys

Author: S. Yanagita, Hiromitsu Ino, Qiu Xu, and Toshimasa Yoshiie
Subjects: Materials science, Neutron flux, Radiochemistry, Neutron irradiation
Published: 2008

42. The PKA Energy Spectrum Analysis of Defect Structures in Neutron Irradiated Metals

Author: X Xu, S. Yanagita, Qiu Xu, Yuhki Satoh, and Toshimasa Yoshiie
Subjects: Chemistry, Radiochemistry, Energy spectrum, Neutron, Irradiation, Atomic physics
Published: 2008

43. CANGAROO-III Observations of the 2006 Outburst of PKS2155-304

Author: Y. Sakamoto, K. Nishijima, T. Mizukami, E. Yamazaki, J. Kushida, R. Enomoto, M. Ohishi, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hattori, S. Hayashi, Y. Higashi, Y. Hirai, K. Inoue, C. Itoh, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, T. Kifune, R. Kiuchi, H. Kubo, R. Mizuniwa, M. Mori, H. Muraishi, T. Naito, T. Nakamori, S. Nakano, D. Nishida, A. Seki, V. Stamatescu, T. Suzuki, D. L. Swaby, T. Tanimori, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, S. Yanagita, T. Yoshida, T. Yoshikoshi, and Y. Yukawa
Subjects: Physics, High energy, Crab Nebula, Space and Planetary Science, Astrophysics (astro-ph), Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Cherenkov radiation
Abstract: We have used the CANGAROO-III imaging atmospheric Cherenkov telescopes to observe the high-frequency-peaked BL Lacertae (HBL) object PKS 2155-304 between 2006 July 28 (MJD 53944) and August 2, triggered by the H.E.S.S. report that the source was in a high state of TeV gamma-ray emission. A signal was detected at the 4.8 sigma level in an effective live time of 25.1 hours during the outburst period. The flux of Very High Energy gammarays from the CANGAROO-III observations shows the variability on the time scale of less than a few hours. The averaged integral flux above 660 GeV is (1.6 +/- 0.3_stat +/- 0.5_syst) x 10^-11 cm^-2 sec^-1 which corresponds to ~45% of the flux observed from the Crab nebula. Follow-up observations between August 17 (MJD 53964) and 25 indicate the source activity had decreased., 24 pages, 7 figures, to be published in ApJ
Published: 2007

44. CANGAROO-III Search for Gamma Rays from Centaurus A and the $\omega$ Centauri Region

Author: S. Kabuki, R. Enomoto, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hattori, S. Hayashi, Y. Higashi, R. Inoue, C. Itoh, F. Kajino, H. Katagiri, A. Kawachi, S. Kawasaki, T. Kifune, R. Kiuchi, K. Konno, H. Kubo, J. Kushida, Y. Matsubara, T. Mizukami, R. Mizuniwa, M. Mori, H. Muraishi, T. Naito, T. Nakamori, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, V. Stamatescu, S. Suzuki, T. Suzuki, D. L. Swaby, T. Tanimori, G. Thornton, F. Tokanai, K. Tsuchiya, S. Watanabe, Y. Yamada, M. Yamazaki, S. Yanagita, T. Yoshida, T. Yoshikoshi, M. Yuasa, and Y. Yukawa
Subjects: Physics, Cold dark matter, Radio galaxy, Astrophysics::High Energy Astrophysical Phenomena, Centaurus A, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, IACT, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Space and Planetary Science, Globular cluster, Omega Centauri, Astrophysics::Galaxy Astrophysics
Abstract: We have observed the giant radio galaxy Centaurus A and the globular cluster $\omega$ Centauri in the TeV energy region using the CANGAROO-III stereoscopic system. The system has been in operation since 2004 withan array of four Imaging Atmospheric Cherenkov Telescopes (IACT) with $\sim$100-m spacings. The observations were carried out in March and April 2004. In total, approximately 10 hours data were obtained for each target.No statistically significant gamma-ray signal has been found above 420 GeV over a wide angular region (a one-degree radius from thepointing center) and we derive flux upper limits using all of the field of view.Implications for the total energy of cosmic rays and the density of the cold dark matter are considered., Comment: 7 pages, 6 figures, to appear in ApJ, emulateapj.cls
Published: 2007

45. A possible explanation of photon emission from supernova remnants by jitter radiation

Author: T. Ogasawara, T. Yoshida, S. Yanagita, and T. Kifune
Published: 2007

46. CANGAROO-III Observations of the supernova remnant RX J0852.0$-$4622

Author: R. Enomoto, S. Watanabe, T. Tanimori, A. Asahara, G. V. Bicknell, R. W. Clay, P. G. Edwards, S. Gunji, S. Hara, T. Hattori, S. Hayashi, Y. Higashi, R. Inoue, C. Itoh, S. Kabuki, F. Kajino, H. Katagiri, A. Kawachi, S. Kawasaki, T. Kifune, R. Kiuchi, K. Konno, L. Ksenofontov, H. Kubo, J. Kushida, Y. Matsubara, T. Mizukami, R. Mizuniwa, M. Mori, H. Muraishi, T. Naito, T. Nakamori, D. Nishida, K. Nishijima, M. Ohishi, Y. Sakamoto, V. Stamatescu, S. Suzuki, T. Suzuki, D. L. Swaby, H. Tanimura, G. Thornton, F. Tokanai, K. Tsuchiya, Y. Yamada, M. Yamazaki, S. Yanagita, T. Yoshida, T. Yoshikoshi, M. Yuasa, and Y. Yukawa
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Coincidence, law.invention, Telescope, Space and Planetary Science, law, Energy spectrum, Supernova remnant, Astrophysics::Galaxy Astrophysics
Abstract: Sub-TeV gamma-ray emission from the North-West rim of the supernova remnant RX J0852.0$-$4622 was detected with the CANGAROO-II telescope and recently confirmed by the H.E.S.S. group. In addition, the H.E.S.S. data revealed a very wide (up to two degrees in diameter), shell-like profile of the gamma-ray emission. We have carried out CANGAROO-III observations in January and February 2005 with three telescopes and show here the results of three-fold coincidence data. We confirm the H.E.S.S. results about the morphology and the energy spectrum, and find the energy spectrum in the NW-rim is consistent with that of the whole remnant., 9 pages, 13 figures, to appear in ApJ
Published: 2006

47. A Search for sub-TeV Gamma-rays from the Vela Pulsar Region with CANGAROO-III

Author: R. Enomoto, K. Tsuchiya, Y. Adachi, S. Kabuki, P. G. Edwards, A. Asahara, G. V. Bicknell, R. W. Clay, Y. Doi, S. Gunji, S. Hara, T. Hara, T. Hattori, Sei. Hayashi, Y. Higashi, R. Inoue, C. Itoh, F. Kajino, H. Katagiri, A. Kawachi, S. Kawasaki, T. Kifune, R. Kiuchi, K. Konno, L. T. Ksenofontov, H. Kubo, J. Kushida, Y. Matsubara, Y. Mizumoto, M. Mori, H. Muraishi, Y. Muraki, T. Naito, T. Nakamori, D. Nishida, K. Nishijima, M. Ohishi, J. R. Patterson, R. J. Protheroe, Y. Sakamoto, M. Sato, S. Suzuki, T. Suzuki, D. L. Swaby, T. Tanimori, H. Tanimura, G. J. Thornton, S. Watanabe, T. Yamaoka, M. Yamazaki, S. Yanagita, T. Yoshida, T. Yoshikoshi, M. Yuasa, and Y. Yukawa
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Vela, Pulsar wind nebula, law.invention, Telescope, Pulsar, Space and Planetary Science, law, Cherenkov radiation
Abstract: We made stereoscopic observations of the Vela Pulsar region with two of the 10 m diameter CANGAROO-III imaging atmospheric Cherenkov telescopes in January and February, 2004, in a search for sub-TeV gamma-rays from the pulsar and surrounding regions. We describe the observations, provide a detailed account of the calibration methods, and introduce the improved and bias-free analysis techniques employed for CANGAROO-III data. No evidence of gamma-ray emission is found from either the pulsar position or the previously reported position offset by 0.13 degree, and the resulting upper limits are a factor of five less than the previously reported flux from observations with the CANGAROO-I 3.8 m telescope. Following the recent report by the H.E.S.S. group of TeV gamma-ray emission from the Pulsar Wind Nebula, which is $\sim$0.5 degree south of the pulsar position, we examined this region and found supporting evidence for emission extended over $\sim$0.6 degree., 13 pages, 26 figures, emulateapj.cls, to appear in ApJ
Published: 2005

48. A Search for TeV Gamma-ray Emission from the PSR B1259-63/SS2883 Binary System with the CANGAROO-II 10-m Telescope

Author: A. Kawachi, T. Naito, J. R. Patterson, P. G. Edwards, A. Asahara, G. V. Bicknell, R. W. Clay, R. Enomoto, S. Gunji, S. Hara, T. Hara, T. Hattori, Seuchi Hayashi, Shin'ichiro Hayashi, C. Itoh, S. Kabuki, F. Kajino, H. Katagiri, T. Kifune, L. Ksenofontov, H. Kubo, J. Kushida, Y. Matsubara, Y. Mizumoto, M. Mori, H. Moro, H. Muraishi, Y. Muraki, T. Nakase, D. Nishida, K. Nishijima, M. Ohishi, K. Okumura, R. J. Protheroe, K. Sakurazawa, D. L. Swaby, T. Tanimori, F. Tokanai, K. Tsuchiya, H. Tsunoo, T. Uchida, A. Watanabe, S. Watanabe, S. Yanagita, T. Yoshida, and T. Yoshikoshi
Subjects: Physics, Be star, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Compton scattering, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Orbital eccentricity, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, law.invention, Telescope, Pulsar, Space and Planetary Science, law, Astrophysics::Solar and Stellar Astrophysics, Binary system, Astrophysics::Earth and Planetary Astrophysics, Cherenkov radiation, Astrophysics::Galaxy Astrophysics
Abstract: 著者人数: 46名, Accepted: 2004-02-16, 資料番号: SA1003381000
Published: 2004

49. Constraints on Cold Dark Matter in the Gamma-ray Halo of NGC 253

Author: C. Itoh, S. Yanagita, Ryoji Enomoto, and Tatsuo Yoshida
Subjects: Physics, Range (particle radiation), Cold dark matter, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, IACT, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, law.invention, Telescope, Space and Planetary Science, law, Halo, Cherenkov radiation, Astrophysics::Galaxy Astrophysics
Abstract: A gamma-ray halo in a nearby starburst galaxy NGC 253 was found by the CANGAROO-II Imaging Atmospheric Cherenkov Telescope (IACT). By fitting the energy spectrum with expected curves from Cold Dark Matter (CDM) annihilations, we constrain the CDM-annihilation rate in the halo of NGC 253. Upper limits for the CDM density were obtained in the wide mass range between 0.5 and 50 TeV. Although these limits are higher than the expected values, it is complementary important to the other experimental techniques, especially considering the energy coverage. We also investigate the next astronomical targets to improve these limits., 13 pages, 5 figures, aastex.cls, natbib.sty, To appear in ApJ v596n1, Oct. 10, 2003
Published: 2003

50. Galactic Gamma-Ray Halo of the Nearby Starburst Galaxy NGC 253

Author: Ryoji Enomoto, C. Itoh, Tatsuo Yoshida, S. Yanagita, and Takeshi Go Tsuru
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Synchrotron, Galaxy, law.invention, Telescope, Space and Planetary Science, law, Astrophysics::Solar and Stellar Astrophysics, Halo, Astrophysics::Galaxy Astrophysics
Abstract: Recently, the CANGAROO-II telescope detected diffuse TeV gamma-ray emission from a nearby edge-on starburst galaxy, NGC 253. The emission mechanism is discussed in this report. We review the emissions of radio-to-TeV gamma-rays from NGC 253, and present a model of the non-thermal emissions due to synchrotron radiations and inverse Compton scatterings. A halo model successfully explains the multiband spectrum of NGC 253., 11 pages, 1 figure. submitted to ApJL
Published: 2003

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

232 results on '"S. Yanagita"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources