研究者詳細 - 田島　宏康

論文 - 田島　宏康

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Studies of propagation mechanism of optical crosstalk in silicon photomultipliers 査読有り

Tajima H., Okumura A., Furuta K.

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1049 巻 2023年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Silicon photomultipliers (SiPMs) are now replacing photomultiplier tubes where low voltage operations, compactness, and cost per channel are important. However, optical crosstalk (OCT) is still one of the major disadvantages of SiPMs since it increases accidental triggers and degrades the accuracy of photon counting. Previously, we reported that OCTs can be suppressed by either thicker or no protection resin coating. Although no resin coating heavily suppresses OCTs, we still observe some OCTs at a few % levels. In this study, we have investigated the properties of OCTs and delayed OCTs for several types of SiPMs with different device sizes, cell sizes, and resin coating thickness. We observe that delayed OCTs have very similar properties compared with OCTs with no resin coating. Furthermore, we find that the sizable amount of delayed OCTs is overlapping with the original pulse and may be treated as OCTs when the delay is less than 8 ns in our analysis. Since the properties and rate of overlaps of delayed OCTs match those of OCTs with no resin coating, we conclude that the remaining OCTs for SiPMs with no coating can be fully explained by overlaps of delayed OCTs.

DOI： 10.1016/j.nima.2023.168029

Scopus

MAGIC observations provide compelling evidence of hadronic multi-TeV emission from the putative PeVatron SNR G106.3+2.7 査読有り

Abe H., Abe S., Acciari V.A., Agudo I., Aniello T., Ansoldi S., Antonelli L.A., Arbet Engels A., Arcaro C., Artero M., Asano K., Baack D., Babić A., Baquero A., Barres De Almeida U., Barrio J.A., Batković I., Baxter J., Becerra González J., Bednarek W., Bernardini E., Bernardos M., Berti A., Besenrieder J., Bhattacharyya W., Bigongiari C., Biland A., Blanch O., Bonnoli G., Bošnjak , Burelli I., Busetto G., Carosi R., Carretero-Castrillo M., Castro-Tirado A.J., Ceribella G., Chai Y., Chilingarian A., Cikota S., Colombo E., Contreras J.L., Cortina J., Covino S., D'Amico G., D'Elia V., Da Vela P., Dazzi F., De Angelis A., De Lotto B., Del Popolo A., Delfino M., Delgado J., Delgado Mendez C., Depaoli D., Di Pierro F., Di Venere L., Do Souto Espiñeira E., Dominis Prester D., Donini A., Dorner D., Doro M., Elsaesser D., Emery G., Escudero J., Fallah Ramazani V., Fariña L., Fattorini A., Font L., Fruck C., Fukami S., Fukazawa Y., García López R.J., Garczarczyk M., Gasparyan S., Gaug M., Giesbrecht Paiva J.G., Giglietto N., Giordano F., Gliwny P., Godinović N., Grau R., Green D., Green J.G., Hadasch D., Hahn A., Hassan T., Heckmann L., Herrera J., Hrupec D., Hütten M., Imazawa R., Inada T., Iotov R., Ishio K., Jiménez Martínez I., Jormanainen J., Kerszberg D., Kobayashi Y., Kubo H., Kushida J.

Astronomy and Astrophysics 671 巻 2023年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Astronomy and Astrophysics

Context. Certain types of supernova remnants (SNRs) in our Galaxy are assumed to be PeVatrons, capable of accelerating cosmic rays (CRs) to ∼ PeV energies. However, conclusive observational evidence for this has not yet been found. The SNR G106.3+2.7, detected at 1- 100 TeV energies by different γ-ray facilities, is one of the most promising PeVatron candidates. This SNR has a cometary shape, which can be divided into a head and a tail region with different physical conditions. However, in which region the 100 TeV emission is produced has not yet been identified because of the limited position accuracy and/or angular resolution of existing observational data. Additionally, it remains unclear as to whether the origin of the γ-ray emission is leptonic or hadronic. Aims. With the better angular resolution provided by new MAGIC data compared to earlier γ-ray datasets, we aim to reveal the acceleration site of PeV particles and the emission mechanism by resolving the SNR G106.3+2.7 with 0.1 resolution at TeV energies. Methods. We observed the SNR G106.3+2.7 using the MAGIC telescopes for 121.7 h in total - after quality cuts - between May 2017 and August 2019. The analysis energy threshold is ∼0.2 TeV, and the angular resolution is 0.07-0.1. We examined the γ-ray spectra of different parts of the emission, whilst benefitting from the unprecedented statistics and angular resolution at these energies provided by our new data. We also used measurements at other wavelengths such as radio, X-rays, GeV γ-rays, and 10 TeV γ-rays to model the emission mechanism precisely. Results. We detect extended γ-ray emission spatially coincident with the radio continuum emission at the head and tail of SNR G106.3+2.7. The fact that we detect a significant γ-ray emission with energies above 6.0 TeV from only the tail region suggests that the emissions above 10 TeV detected with air shower experiments (Milagro, HAWC, Tibet ASγ and LHAASO) are emitted only from the SNR tail. Under this assumption, the multi-wavelength spectrum of the head region can be explained with either hadronic or leptonic models, while the leptonic model for the tail region is in contradiction with the emission above 10 TeV and X-rays. In contrast, the hadronic model could reproduce the observed spectrum at the tail by assuming a proton spectrum with a cutoff energy of ∼1 PeV for that region. Such high-energy emission in this middle-aged SNR (4-10 kyr) can be explained by considering a scenario where protons escaping from the SNR in the past interact with surrounding dense gases at present. Conclusions. The γ-ray emission region detected with the MAGIC telescopes in the SNR G106.3+2.7 is extended and spatially coincident with the radio continuum morphology. The multi-wavelength spectrum of the emission from the tail region suggests proton acceleration up to ∼PeV, while the emission mechanism of the head region could either be hadronic or leptonic.

DOI： 10.1051/0004-6361/202244931

Scopus

The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3 査読有り

Ajello M., Baldini L., Ballet J., Bastieri D., Gonzalez J. Becerra, Bellazzini R., Berretta A., Bissaldi E., Bonino R., Brill A., Bruel P., Buson S., Caputo R., Caraveo P. A., Cheung C. C., Chiaro G., Cibrario N., Ciprini S., Crnogorcevic M., Cutini S., D'Ammando F., De Gaetano S., Di Lalla N., Di Venere L., Dominguez A., Ramazani V. Fallah, Ferrara E. C., Fiori A., Fukazawa Y., Funk S., Fusco P., Gammaldi V, Gargano F., Garrappa S., Gasparrini D., Giglietto N., Giordano F., Giroletti M., Green D., Grenier I. A., Guiriec S., Horan D., Hou X., Kayanoki T., Kuss M., Larsson S., Latronico L., Lewis T., Li J., Liodakis I, Longo F., Loparco F., Lott B., Lovellette M. N., Lubrano P., Madejski G. M., Maldera S., Manfreda A., Marti-Devesa G., Mazziotta M. N., Mereu I, Michelson P. F., Mirabal N., Mitthumsiri W., Mizuno T., Monzani M. E., Morselli A., Moskalenko I. V, Negro M., Ojha R., Orienti M., Orlando E., Ormes J. F., Pei Z., Pena-Herazo H., Persic M., Pesce-Rollins M., Petrosian V, Pillera R., Poon H., Porter T. A., Principe G., Raino S., Rando R., Rani B., Razzano M., Razzaque S., Reimer A., Reimer O., Scotton L., Serini D., Sgro C., Siskind E. J., Spandre G., Spinelli P., Suson D. J., Tajima H., Torres D. F., Valverde J., Yassin H., Zaharijas G.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 263 巻 ( 2 ) 2022年12月

Gamma-ray observations of MAXI J1820+070 during the 2018 outburst 査読有り

Abe, H; Abe, S; Acciari, VA; Aniello, T; Ansoldi, S; Antonelli, LA; Engels, AA; Arcaro, C; Artero, M; Asano, K; Baack, D; Babic, A; Baquero, A; de Almeida, UB; Barrio, JA; Batkovic, ; Baxter, J; González, JB; Bednarek, W; Bernardini, E; Bernardos, M; Berti, A; Besenrieder, J; Bhattacharyya, W; Bigongiari, C; Biland, A; Blanch, O; Bonnoli, G; Bosnjak, Z; Burelli, ; Busetto, G; Carosi, R; Carretero-Castrillo, M; Ceribella, G; Chai, Y; Chilingarian, A; Cikota, S; Colombo, E; Contreras, JL; Cortina, J; Covino, S; D'Amico, G; D'Elia, ; Da Vela, P; Dazzi, F; De Angelis, A; De Lotto, B; Del Popolo, A; Delfino, M; Delgado, J; Mendez, CD; Depaoli, D; Di Pierro, F; Di Venere, L; Prester, DD; Donini, A; Dorner, D; Doro, M; Elsaesser, D; Emery, G; Ramazani, VF; Fariña, L; Fattorini, A; Font, L; Fruck, C; Fukami, S; Fukazawa, Y; López, RJG; Garczarczyk, M; Gasparyan, S; Gaug, M; Paiva, JGG; Giglietto, N; Giordano, F; Gliwny, P; Godinovic, N; Grau, R; Green, D; Green, JG; Hadasch, D; Hahn, A; Hassan, T; Heckmann, L; Herrera, J; Hoang, J; Hrupec, D; Hütten, M; Imazawa, R; Inada, T; Iotov, R; Ishio, K; Martínez, IJ; Jormanainen, J; Kerszberg, D; Kobayashi, Y; Kubo, H; Kushida, J; Lamastra, A; Lelas, D; Leone, F; Lindfors, E; Linhoff, L; Lombardi, S; Longo, F; López-Coto, R; López-Moya, M; López-Oramas, A; Loporchio, S; Lorini, A; Lyard, E; Fraga, BMD; Majumdar, P; Makariev, M; Maneva, G; Mang, N; Manganaro, M; Mangano, S; Mannheim, K; Mariotti, M; Martínez, M; Aguilar, AM; Mazin, D; Menchiari, S; Mender, S; Micanovic, S; Miceli, D; Miener, T; Miranda, JM; Mirzoyan, R; Molina, E; Mondal, HA; Moralejo, A; Morcuende, D; Moreno, ; Nakamori, T; Nanci, C; Nava, L; Neustroev, ; Rosillo, MN; Nigro, C; Nilsson, K; Nishijima, K; Ekoume, TN; Noda, K; Nozaki, S; Ohtani, Y; Oka, T; Okumura, A; Otero-Santos, J; Paiano, S; Palatiello, M; Paneque, D; Paoletti, R; Paredes, JM; Pavletic, L; Persic, M; Pihet, M; Pirola, G; Podobnik, F; Moroni, PGP; Prandini, E; Principe, G; Priyadarshi, C; Puljak, ; Rhode, W; Ribó, M; Rico, J; Righi, C; Rugliancich, A; Sahakyan, N; Saito, T; Sakurai, S; Satalecka, K; Saturni, FG; Schleicher, B; Schmidt, K; Schmuckermaier, F; Schubert, JL; Schweizer, T; Sitarek, J; Sliusar, ; Sobczynska, D; Spolon, A; Stamerra, A; Striskovic, J; Strom, D; Strzys, M; Suda, Y; Suric, T; Tajima, H; Takahashi, M; Takeishi, R; Tavecchio, F; Temnikov, P; Terauchi, K; Terzic, T; Teshima, M; Tosti, L; Truzzi, S; Tutone, A; Ubach, S; van Scherpenberg, J; Acosta, MV; Ventura, S; Verguilov, V; Viale, ; Vigorito, CF; Vitale, V; Vovk, ; Walter, R; Will, M; Wunderlich, C; Yamamoto, T; Zaric, D; Abdalla, H; Aharonian, F; Benkhali, FA; Angüner, EO; Ashkar, H; Backes, M; Baghmanyan, ; Martins, VB; Batzofin, R; Becherini, Y; Berge, D; Bernlöhr, K; Böttcher, M; Boisson, C; Bolmont, J; de Lavergne, MD; Bradascio, F; Breuhaus, M; Brose, R; Brun, F; Bulik, T; Bylund, T; Cangemi, F; Caroff, S; Casanova, S; Cerruti, M; Chand, T; Chandra, S; Chen, A; Chibueze, OU; Cotter, G; Cristofari, P; Mbarubucyeye, JD; Devin, J; Djannati-Ataï, A; Dmytriiev, A; Egberts, K; Ernenwein, JP; Fiasson, A; de Clairfontaine, GF; Fontaine, G; Füssling, M; Funk, S; Gabici, S; Ghafourizadeh, S; Giavitto, G; Glawion, D; Glicenstein, JF; Goswami, P; Grolleron, G; Hinton, JA; Hörbe, M; Hoischen, C; Holch, TL; Holler, M; Horns, D; Huang, ZQ; Jamrozy, M; Jankowsky, F; Joshi, ; Jung-Richardt, ; Kasai, E; Katarzynski, K; Katz, U; Khélifi, B; Kluzniak, W; Komin, N; Kosack, K; Kostunin, D; Lang, RG; Le Stum, S; Lemière, A; Lemoine-Goumard, M; Lenain, JP; Leuschner, F; Lohse, T; Luashvili, A; Lypova, ; Mackey, J; Majumdar, J; Malyshev, D; Malyshev, D; Marandon, ; Marchegiani, P; Martí-Devesa, G; Marx, R; Maurin, G; Meyer, M; Mitchell, A; Moderski, R; Mohrmann, L; Montanari, A; Moulin, E; Muller, J; Murach, T; Nakashima, K; de Naurois, M; Nayerhoda, A; Niemiec, J; Noel, AP; O'Brien, P; Ohm, S; Olivera-Nieto, L; Wilhelmi, ED; Ostrowski, M; Panny, S; Panter, M; Parsons, RD; Poireau, ; Prokhorov, DA; Prokoph, H; Pühlhofer, G; Punch, M; Quirrenbach, A; Reichherzer, P; Reimer, A; Reimer, O; Renaud, M; Rieger, F; Rowell, G; Rudak, B; Ricarte, HR; Ruiz-Velasco, E; Sahakian, ; Salzmann, H; Santangelo, A; Sasaki, M; Schäfer, J; Schüssler, F; Schutte, HM; Schwanke, U; Shapopi, JNS; Sol, H; Specovius, A; Spencer, S; Stawarz, L; Steenkamp, R; Steinmassl, S; Steppa, C; Sushch, ; Suzuki, H; Takahashi, T; Tanaka, T; Thorpe-Morgan, C; Tluczykont, M; Tomankova, L; Tsuji, N; Uchiyama, Y; van Eldik, C; van Soelen, B; Vecchi, M; Veh, J; Venter, C; Vink, J; Wagner, SJ; White, R; Wierzcholska, A; Wong, YW; Yusafzai, A; Zacharias, M; Zanin, R; Zargaryan, D; Zdziarski, AA; Zech, A; Zhu, SJ; Zouari, S; Zywucka, N; Acharyya, A; Adams, CB; Batista, P; Benbow, W; Capasso, M; Christiansen, JL; Chromey, AJ; Errando, M; Falcone, A; Feng, Q; Finley, JP; Foote, GM; Fortson, L; Furniss, A; Gent, A; Hanlon, WE; Hervet, O; Holder, J; Hona, B; Humensky, TB; Jin, W; Kaaret, P; Kertzman, M; Kherlakian, M; Kleiner, TK; Kumar, S; Lang, MJ; Lundy, M; Maier, G; McGrath, CE; Millis, J; Moriarty, P; Mukherjee, R; O'Brien, S; Ong, RA; Park, N; Patel, SR; Pfrang, K; Pohl, M; Pueschel, E; Quinn, J; Ragan, K; Reynolds, PT; Ribeiro, D; Roache, E; Ryan, JL; Sadeh, ; Saha, L; Santander, M; Sembroski, GH; Shang, R; Splettstoesser, M; Tak, D; Tucci, J; Weinstein, A; Williams, DA; Williamson, TJ; Bosch-Ramon, ; Celma, C; Linares, M; Russell, DM; Sala, G

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 517 巻 ( 4 ) 頁： 4736 - 4751 2022年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Monthly Notices of the Royal Astronomical Society

MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst from 2018 March to October, showing evidence of a non-thermal particle population through its radio emission during this whole period. The combined results of 59.5 h of observations of the MAXI J1820+070 outburst with the H.E.S.S., MAGIC and VERITAS experiments at energies above 200 GeV are presented, together with Fermi-LAT data between 0.1 and 500 GeV, and multiwavelength observations from radio to X-rays. Gamma-ray emission is not detected from MAXI J1820+070, but the obtained upper limits and the multiwavelength data allow us to put meaningful constraints on the source properties under reasonable assumptions regarding the non-thermal particle population and the jet synchrotron spectrum. In particular, it is possible to show that, if a high-energy (HE) gamma-ray emitting region is present during the hard state of the source, its predicted flux should be at most a factor of 20 below the obtained Fermi-LAT upper limits, and closer to them for magnetic fields significantly below equipartition. During the state transitions, under the plausible assumption that electrons are accelerated up to ∼500 GeV, the multiwavelength data and the gamma-ray upper limits lead consistently to the conclusion that a potential HE and very-HE gamma-ray emitting region should be located at a distance from the BH ranging between 1011 and 1013 cm. Similar outbursts from low-mass X-ray binaries might be detectable in the near future with upcoming instruments such as CTA.

DOI： 10.1093/mnras/stac2686

Web of Science

Scopus

All-sky Medium Energy Gamma-ray Observatory eXplorer mission concept 査読有り

Caputo Regina, Ajello Marco, Kierans Carolyn A., Perkins Jeremy S., Racusin Judith L., Baldini Luca, Baring Matthew G., Bissaldi Elisabetta, Burns Eric, Cannady Nicholas, Charles Eric, da Silva Rui M. Curado, Fang Ke, Fleischhack Henrike, Fryer Chris, Fukazawa Yasushi, Grove J. Eric, Hartmann Dieter, Howell Eric J., Jadhav Manoj, Karwin Christopher M., Kocevski Daniel, Kurahashi Naoko, Latronico Luca, Lewis Tiffany R., Leys Richard, Lien Amy, Marcotulli Lea, Martinez-Castellanos Israel, Mazziotta Mario Nicola, McEnery Julie, Metcalfe Jessica, Murase Kohta, Negro Michela, Parker Lucas, Phlips Bernard, Prescod-Weinstein Chanda, Razzaque Soebur, Shawhan Peter S., Sheng Yong, Shutt Tom A., Shy Daniel, Sleator Clio, Steinhebel Amanda L., Striebig Nicolas, Suda Yusuke, Tak Donggeun, Tajima Hiro, Valverde Janeth, Venters Tonia M., Wadiasingh Zorawar, Woolf Richard S., Wulf Eric A., Zhang Haocheng, Zoglauer Andreas

JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS 8 巻 ( 4 ) 2022年10月

Search for New Cosmic-Ray Acceleration Sites within the 4FGL Catalog Galactic Plane Sources 査読有り国際共著国際誌

Abdollahi, S; Acero, F; Ackermann, M; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, D; Bellazzini, R; Berenji, B; Berretta, A; Bissaldi, E; Blandford, RD; Bonino, R; Bruel, P; Buson, S; Cameron, RA; Caputo, R; Caraveo, PA; Castro, D; Chiaro, G; Cibrario, N; Ciprini, S; Coronado-Blázquez, J; Crnogorcevic, M; Cutini, S; D'Ammando, F; De Gaetano, S; Di Lalla, N; Dirirsa, F; Di Venere, L; Domínguez, A; Fegan, SJ; Fiori, A; Fleischhack, H; Franckowiak, A; Fukazawa, Y; Fusco, P; Gammaldi, V; Gargano, F; Gasparrini, D; Giacchino, F; Giglietto, N; Giordano, F; Giroletti, M; Glanzman, T; Green, D; Grenier, IA; Grondin, MH; Guiriec, S; Gustafsson, M; Harding, AK; Hays, E; Hewitt, JW; Horan, D; Hou, X; Jóhannesson, G; Kayanoki, T; Kerr, M; Kuss, M; Larsson, S; Latronico, L; Lemoine-Goumard, M; Li, J; Longo, F; Loparco, F; Lubrano, P; Maldera, S; Malyshev, D; Manfreda, A; Martí-Devesa, G; Mazziotta, MN; Mereu, I; Michelson, PF; Mirabal, N; Mitthumsiri, W; Mizuno, T; Monzani, ME; Morselli, A; Moskalenko, IV; Nuss, E; Omodei, N; Orienti, M; Orlando, E; Ormes, JF; Paneque, D; Pei, Z; Persic, M; Pesce-Rollins, M; Pillera, R; Poon, H; Porter, TA; Principe, G; Rainò, S; Rando, R; Rani, B; Razzano, M; Razzaque, S; Reimer, A; Reimer, O; Reposeur, T; Sánchez-Conde, M; Parkinson, PMS; Scotton, L; Serini, D; Sgrò, C; Siskind, EJ; Spandre, G; Spinelli, P; Sueoka, K; Suson, DJ; Tajima, H; Tak, D; Thayer, JB; Torres, DF; Troja, E; Valverde, J; Wadiasingh, Z; Wood, K; Zaharijas, G

ASTROPHYSICAL JOURNAL 933 巻 ( 2 ) 2022年7月

Incremental Fermi Large Area Telescope Fourth Source Catalog 査読有り国際共著国際誌

Abdollahi, S; Acero, F; Baldini, L; Ballet, J; Bastieri, D; Bellazzini, R; Berenji, B; Berretta, A; Bissaldi, E; Blandford, RD; Bloom, E; Bonino, R; Brill, A; Britto, RJ; Bruel, P; Burnett, TH; Buson, S; Cameron, RA; Caputo, R; Caraveo, PA; Castro, D; Chaty, S; Cheung, CC; Chiaro, G; Cibrario, N; Ciprini, S; Coronado-Blázquez, J; Crnogorcevic, M; Cutini, S; D'Ammando, F; De Gaetano, S; Digel, SW; Di Lalla, N; Dirirsa, F; Di Venere, L; Domínguez, A; Ramazani, VF; Fegan, SJ; Ferrara, EC; Fiori, A; Fleischhack, H; Franckowiak, A; Fukazawa, Y; Funk, S; Fusco, P; Galanti, G; Gammaldi, V; Gargano, F; Garrappa, S; Gasparrini, D; Giacchino, F; Giglietto, N; Giordano, F; Giroletti, M; Glanzman, T; Green, D; Grenier, IA; Grondin, MH; Guillemot, L; Guiriec, S; Gustafsson, M; Harding, AK; Hays, E; Hewitt, JW; Horan, D; Hou, X; Jóhannesson, G; Karwin, C; Kayanoki, T; Kerr, M; Kuss, M; Landriu, D; Larsson, S; Latronico, L; Lemoine-Goumard, M; Li, J; Liodakis, I; Longo, F; Loparco, F; Lott, B; Lubrano, P; Maldera, S; Malyshev, D; Manfreda, A; Martí-Devesa, G; Mazziotta, MN; Mereu, I; Meyer, M; Michelson, PF; Mirabal, N; Mitthumsiri, W; Mizuno, T; Moiseev, AA; Monzani, ME; Morselli, A; Moskalenko, IV; Negro, M; Nuss, E; Omodei, N; Orienti, M; Orlando, E; Paneque, D; Pei, Z; Perkins, JS; Persic, M; Pesce-Rollins, M; Petrosian, V; Pillera, R; Poon, H; Porter, TA; Principe, G; Rainò, S; Rando, R; Rani, B; Razzano, M; Razzaque, S; Reimer, A; Reimer, O; Reposeur, T; Sánchez-Conde, M; Parkinson, PMS; Scotton, L; Serini, D; Sgrò, C; Siskind, EJ; Smith, DA; Spandre, G; Spinelli, P; Sueoka, K; Suson, DJ; Tajima, H; Tak, D; Thayer, JB; Thompson, DJ; Torres, DF; Troja, E; Valverde, J; Wood, K; Zaharijas, G

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 260 巻 ( 2 ) 2022年6月

Design and performance of the prototype Schwarzschild-Couder telescope camera 査読有り国際共著国際誌

Adams, CB; Ambrosi, G; Ambrosio, M; Aramo, C; Arlen, T; Benbow, W; Bertucci, B; Bissaldi, E; Biteau, J; Bitossi, M; Boiano, A; Bonavolontà, C; Bose, R; Bouvier, A; Buscemi, M; Brill, A; Brown, AM; Buckley, JH; Canestrari, R; Capasso, M; Caprai, M; Coppi, P; Covault, CE; Depaoli, D; Di Venere, L; Errando, M; Fegan, S; Feng, Q; Fiandrini, E; Furniss, A; Garczarczyk, M; Gent, A; Giglietto, N; Giordano, F; Giro, E; Halliday, R; Hervet, O; Hughes, G; Incardona, S; Humensky, TB; Ionica, M; Jin, WD; Johnson, CA; Kieda, D; Krennrich, F; Kuznetsov, A; Lapington, J; Licciulli, F; Loporchio, S; Marsella, G; Masone, V; Meagher, K; Meures, T; Mode, BAW; Mognet, SAI; Mukherjee, R; Okumura, A; Pantaleo, FR; Paoletti, R; Di Pierro, F; Ribeiro, D; Riitano, L; Roache, E; Ross, D; Rousselle, J; Rugliancich, A; Santander, M; Schneider, M; Schoorlemmer, H; Shang, RY; Stevenson, B; Stiaccini, L; Tajima, H; Taylor, LP; Thornhill, J; Tosti, L; Tripodo, G; Vagelli, V; Valentino, M; Vandenbroucke, J; Vassiliev, VV; Wakely, SP; Watson, JJ; White, R; Wilcox, P; Williams, DA; Wood, M; Yu, P; Zink, A

JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS 8 巻 ( 1 ) 2022年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Astronomical Telescopes, Instruments, and Systems

The prototype Schwarzschild-Couder Telescope (pSCT) is a candidate for a medium-sized telescope in the Cherenkov Telescope Array. The pSCT is based on a dual-mirror optics design that reduces the plate scale and allows for the use of silicon photomultipliers as photodetectors. The prototype pSCT camera currently has only the central sector instrumented with 25 camera modules (1600 pixels), providing a 2.68-deg field of view (FoV). The camera electronics are based on custom TARGET (TeV array readout with GSa/s sampling and event trigger) application-specific integrated circuits. Field programmable gate arrays sample incoming signals at a gigasample per second. A single backplane provides camera-wide triggers. An upgrade of the pSCT camera that will fully populate the focal plane is in progress. This will increase the number of pixels to 11,328, the number of backplanes to 9, and the FoV to 8.04 deg. Here, we give a detailed description of the pSCT camera, including the basic concept, mechanical design, detectors, electronics, current status, and first light.

DOI： 10.1117/1.JATIS.8.1.014007

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The Small-Sized Telescope of CTAO 査読有り

Tagliaferri, G; Antonelli, A; Arnesen, T; Aschersleben, J; Attinà, P; Balbo, M; Bang, S; Barcelo, M; Baryshev, A; Bellassai, G; Berge, D; Bicknell, C; Bigongiari, C; Bonnoli, G; Bouley, F; Brown, A; Bulgarelli, A; Cappi, M; Caraveo, P; Caschera, S; Chadwick, P; Conte, F; Cotter, G; Cristofari, P; De Frondat, F; Dal Pino, ED; De Simone, N; Depaoli, D; Dournaux, JL; Duffy, C; Einecke, S; Fermino, C; Funk, S; Gargano, C; Giavitto, G; Giuliani, A; Greenshaw, T; Hinton, J; Huet, JM; Iovenitti, S; La Palombara, N; Lapington, J; Laporte, P; Leach, S; Lessio, L; Leto, G; Lloyd, S; Lucarelli, F; Lombardi, S; Macchi, A; Martinetti, E; Miccichè, A; Millul, R; Mineo, T; Mitsunari, T; Nayak, A; Nicotra, G; Okumura, A; Pareschi, G; Penno, M; Prokoph, H; Rebert, E; Righi, C; Rulten, C; Russo, F; Sanchez, RZ; Saturni, FG; Schaefer, J; Schwab, B; Scuderi, S; Sironi, G; Sliusar, V; Sol, H; Spencer, S; Stamerra, A; Tajima, H; Tavecchio, F; Tosti, G; Trois, A; Vecchi, M; Vercellone, S; Vink, J; Walter, R; Watson, J; White, R; Zanin, R; Zampieri, L; Zech, A; Zink, A

GROUND-BASED AND AIRBORNE TELESCOPES IX 12182 巻 2022年

SOlar Neutron and Gamma-ray Spectroscopy Mission (SONGS) 査読有り

Yamaoka, K; Tajima, H; Miyata, K; Usami, M; Watabe, T; Matsushita, K; Ito, K; Nakazawa, K; Masuda, S; Tani, K; Arai, M; Hatori, S; Kume, K; Mizushima, S; Takahashi, H; Watanabe, K

SPACE TELESCOPES AND INSTRUMENTATION 2022: ULTRAVIOLET TO GAMMA RAY 12181 巻 2022年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Proceedings of SPIE - The International Society for Optical Engineering

The SOlar Neutron and Gamma-ray Spectroscopy (SONGS) mission is a 3U cubesat dedicated for detecting neutrons and gamma-rays associated with intense solar flares. Solar neutron observations have not been in progress because ground-based observations are affected by attenuation in the Earth atmosphere, and there is no dedicated mission in space at present. Hence, we are now developing in collaboration between science and engineering people at universities, and preparing for launch around 2024 during the next solar maximum. The SONGS carries a novel radiation detector which consists of multi-layered plastic scintillator bars and GAGG(Ce) scintillator array so that it can determine energies for both neutrons and gamma-rays. In total 704 signals from Silicon photo-multipliers (SiPMs) are processed by 45 ASICs with very low power consumption, and realized within limited resources. In this presentation, we will describe scientific motivation, mission and instrument overview, and results from the bread-board model (BBM).

DOI： 10.1117/12.2629131

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AstroPix: Novel monolithic active pixel silicon sensors for future gamma-ray telescopes 査読有り

Steinhebel, AL; Fleischhack, H; Striebig, N; Jadhav, M; Suda, Y; Luz, R; Kierans, C; Caputo, R; Tajima, H; Leys, R; Peric, I; Metcalfe, J; Perkins, JS

SPACE TELESCOPES AND INSTRUMENTATION 2022: ULTRAVIOLET TO GAMMA RAY 12181 巻 2022年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Proceedings of SPIE - The International Society for Optical Engineering

Space-based γ-ray telescopes such as the Fermi Large Area Telescope have used single sided silicon strip detectors to track secondary charged particles produced by primary γ-rays with high resolution. At the lower energies targeted by keV-MeV telescopes, two dimensional position information within a single detector is required for event reconstruction - especially in the Compton regime. This work describes the development of monolithic CMOS active pixel silicon sensors – AstroPix – as a novel technology for use in future γ-ray telescopes. Based upon sensors (ATLASPix) designed for use in the ATLAS detector at the Large Hadron Collider, AstroPix has the potential to maintain high performance while reducing noise with low power consumption. This is achieved with the dual detection and readout capabilities in each CMOS pixel. The status of AstroPix development and testing, as well as outlook for future testing and application, will be presented.

DOI： 10.1117/12.2630405

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High-energy gamma-rays and neutrons observed in very impulsive solar flare on 2012 June 3 査読有り

Kamiya, K; Koga, K; Masuda, S; Matsumoto, H; Muraki, Y; Okudaira, O; Shibata, S; Tajima, H; Tanaka, Y; Yamamoto, T; Watanabe, K

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 73 巻 ( 6 ) 頁： 1443 - 1469 2021年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Publications of the Astronomical Society of Japan

An impulsive solar flare was observed on 2012 June 3 by the Geostationary Operational Environment Satellite. In this flare, a salient feature was recognized whereby high-energy ions were accelerated to a few GeV within one minute. Associated with this flare, high-energy gamma-rays as well as high-energy neutrons were detected by the Space Environment Data Acquisition equipment onboard the International Space Station. A remarkable feature found of this event was an exceedingly high n/γ-ratio observed between the intensities of high-energy neutrons and gamma-rays. To understand a high n/γ-ratio of about 600, the interaction processes between the accelerated ions and ambient solar atmosphere were simulated for various test cases, taking into account the magnetic field of the photosphere. The simulation was extended by using the GEANT4 code and it was shown that the observed results could be reproduced under certain conditions selected for the actual interaction process. The results suggest that helium and C, N, and O ions were predominantly accelerated in this flare, and that high-energy gamma-rays and neutrons were produced by interactions between the accelerated ions and the ambient gas. As a result, a high n/γ-ratio was produced.

DOI： 10.1093/pasj/psab089

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Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data 査読有り

Baldini, L; Ballet, J; Bastieri, D; Gonzalez, JB; Bellazzini, R; Berretta, A; Bissaldi, E; Blandford, RD; Bloom, ED; Bonino, R; Bottacini, E; Bruel, P; Buson, S; Cameron, RA; Caraveo, PA; Cavazzuti, E; Chen, S; Chiaro, G; Ciangottini, D; Cibario, N; Ciprini, S; Orestano, PC; Crnogorcevic, M; Cutini, S; D'Ammando, F; Luque, PD; de Palma, F; Digel, SW; Di Lalla, N; Dirirsa, F; Di Venere, L; Domínguez, A; Fiori, A; Fleischhack, H; Franckowiak, A; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Germani, S; Giglietto, N; Giordano, F; Giroletti, M; Green, D; Grenier, IA; Griffin, S; Guiriec, S; Gustafsson, M; Hewitt, JW; Horan, D; Imazawa, R; Jóhannesson, G; Kerr, M; Kocevski, D; Kuss, M; Larsson, S; Latronico, L; Li, J; Liodakis, I; Longo, F; Loparco, F; Lovellette, MN; Lubrano, P; Maldera, S; Manfreda, A; Martí-Devesa, G; Matake, H; Mazziotta, MN; Mereu, I; Meyer, M; Mirabal, N; Mitthumsiri, W; Mizuno, T; Monzani, ME; Morselli, A; Moskalenko, IV; Nagasawa, S; Negro, M; Ojha, R; Orienti, M; Orlando, E; Palatiello, M; Paliya, V; Paneque, D; Pei, Z; Persic, M; Pesce-Rollins, M; Petrosian, V; Poon, H; Porter, TA; Principe, G; Racusin, JL; Rainò, S; Rando, R; Rani, B; Razzano, M; Razzaque, S; Reimer, A; Reimer, O; Parkinson, PMS; Scotton, L; Serini, D; Sgrò, C; Siskind, EJ; Spandre, G; Spinelli, P; Suson, DJ; Tajima, H; Tak, D; Torres, DF; Tosti, G; Troja, E; Wood, K; Yassine, M; Zaharijas, G

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 256 巻 ( 1 ) 2021年9月

Fermi Large Area Telescope Performance after 10 Years of Operation 査読有り国際共著

Ajello, M; Atwood, WB; Axelsson, M; Bagagli, R; Bagni, M; Baldini, L; Bastieri, D; Bellardi, F; Bellazzini, R; Bissaldi, E; Bloom, ED; Bonino, R; Bregeon, J; Brez, A; Bruel, P; Buehler, R; Buson, S; Cameron, RA; Caraveo, PA; Cavazzuti, E; Ceccanti, M; Chen, S; Cheung, CC; Ciprini, S; Cognard, I; Cohen-Tanugi, J; Cutini, S; D'Ammando, F; Luque, PD; de Palma, F; Digel, SW; Dirirsa, F; Di Lalla, N; Di Venere, L; Domínguez, A; Fabiani, D; Ferrara, EC; Fiori, A; Foglia, G; Fukazawa, Y; Fusco, P; Gargano, F; Gasparrini, D; Giroletti, M; Glanzman, T; Green, D; Griffin, S; Grondin, MH; Grove, JE; Guillemot, L; Guiriec, S; Gustafsson, M; Hays, E; Horan, D; Jóhannesson, G; Johnson, TJ; Kamae, T; Kerr, M; Kuss, M; Larsson, S; Latronico, L; Lemoine-Goumard, M; Li, J; Liodakis, I; Longo, F; Loparco, F; Lovellette, MN; Lubrano, P; Maldera, S; Manfreda, A; Martí-Devesa, G; Mazziotta, MN; Menon, N; Mereu, I; Meyer, M; Michelson, PF; Minuti, M; Mitthumsiri, W; Mizuno, T; Mongelli, M; Monzani, ME; Moskalenko, IV; Negro, M; Nuss, E; Ojha, R; Orienti, M; Orlando, E; Paccagnella, A; Paliya, VS; Paneque, D; Pei, Z; Perkins, JS; Pesce-Rollins, M; Pinchera, M; Piron, F; Poon, H; Porter, TA; Primavera, R; Principe, G; Racusin, JL; Rainò, S; Rando, R; Rani, B; Rapposelli, E; Razzano, M; Razzaque, S; Reimer, A; Reimer, O; Russell, JJ; Saggini, N; Parkinson, PMS; Scolieri, N; Serini, D; Sgrò, C; Siskind, EJ; Smith, DA; Spandre, G; Spinelli, P; Suson, DJ; Tajima, H; Thayer, JG; Thompson, DJ; Tibaldo, L; Torres, DF; Tosti, G; Valverde, J; Vigiani, L; Zaharijas, G

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 256 巻 ( 1 ) 2021年9月

High-energy emission from a magnetar giant flare in the Sculptor galaxy 査読有り

Ajello, M; Atwood, WB; Axelsson, M; Baldini, L; Barbiellini, G; Baring, MG; Bastieri, D; Bellazzini, R; Berretta, A; Bissaldi, E; Blandford, RD; Bonino, R; Bregeon, J; Bruel, P; Buehler, R; Burns, E; Buson, S; Cameron, RA; Caraveo, PA; Cavazzuti, E; Chen, S; Cheung, CC; Chiaro, G; Ciprini, S; Costantin, D; Crnogorcevic, M; Cutini, S; D'Ammando, F; Luque, PD; de Palma, F; Digel, SW; Di Lalla, N; Di Venere, L; Dirirsa, FF; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Giglietto, N; Gill, R; Giordano, F; Giroletti, M; Granot, J; Green, D; Grenier, IA; Griffin, S; Guiriec, S; Hays, E; Horan, D; Jóhannesson, G; Kerr, M; Kovacevic, M; Kuss, M; Larsson, S; Latronico, L; Li, J; Longo, F; Loparco, F; Lovellette, MN; Lubrano, P; Maldera, S; Manfreda, A; Martí-Devesa, G; Mazziotta, MN; McEnery, JE; Mereu, I; Michelson, PF; Mizuno, T; Monzani, ME; Morselli, A; Moskalenko, IV; Negro, M; Omodei, N; Orienti, M; Orlando, E; Paliya, VS; Paneque, D; Pei, Z; Pesce-Rollins, M; Piron, F; Poon, H; Porter, TA; Principe, G; Racusin, JL; Rainò, S; Rando, R; Rani, B; Razzaque, S; Reimer, A; Reimer, O; Parkinson, PMS; Scargle, JD; Scotton, L; Serini, D; Sgrò, C; Siskind, EJ; Spandre, G; Spinelli, P; Tajima, H; Takahashi, MN; Tak, D; Torres, DF; Tosti, G; Troja, E; Wadiasingh, Z; Wood, K; Yassine, M; Yusafzai, A; Zaharijas, G

NATURE ASTRONOMY 5 巻 ( 4 ) 頁： 385 - + 2021年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nature Astronomy

Magnetars are the most highly magnetized neutron stars in the cosmos (with magnetic field 1013–1015 G). Giant flares from magnetars are rare, short-duration (about 0.1 s) bursts of hard X-rays and soft γ rays1,2. Owing to the limited sensitivity and energy coverage of previous telescopes, no magnetar giant flare has been detected at gigaelectronvolt (GeV) energies. Here, we report the discovery of GeV emission from a magnetar giant flare on 15 April 2020 (refs. 3,4 and A. J. Castro-Tirado et al., manuscript in preparation). The Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope detected GeV γ rays from 19 s until 284 s after the initial detection of a signal in the megaelectronvolt (MeV) band. Our analysis shows that these γ rays are spatially associated with the nearby (3.5 megaparsecs) Sculptor galaxy and are unlikely to originate from a cosmological γ-ray burst. Thus, we infer that the γ rays originated with the magnetar giant flare in Sculptor. We suggest that the GeV signal is generated by an ultra-relativistic outflow that first radiates the prompt MeV-band photons, and then deposits its energy far from the stellar magnetosphere. After a propagation delay, the outflow interacts with environmental gas and produces shock waves that accelerate electrons to very high energies; these electrons then emit GeV γ rays as optically thin synchrotron radiation. This observation implies that a relativistic outflow is associated with the magnetar giant flare, and suggests the possibility that magnetars can power some short γ-ray bursts.

DOI： 10.1038/s41550-020-01287-8

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Detection of the Crab Nebula with the 9.7 m prototype Schwarzschild-Couder telescope 査読有り

Adams, CB; Alfaro, R; Ambrosi, G; Ambrosio, M; Aramo, C; Arlen, T; Batista, PI; Benbow, W; Bertucci, B; Bissaldi, E; Biteau, J; Bitossi, M; Boiano, A; Bonavolontà, C; Bose, R; Bouvier, A; Brill, A; Brown, AM; Buckley, JH; Byrum, K; Cameron, RA; Canestrari, R; Capasso, M; Caprai, M; Covault, CE; Depaoli, D; Errando, M; Fegan, S; Feng, Q; Fiandrini, E; Foote, G; Fortin, P; Funk, S; Furniss, A; Garfias, F; Gent, A; Giglietto, N; Giordano, F; Giro, E; González, MM; Guarino, V; Halliday, R; Hervet, O; Holder, J; Hughes, G; Humensky, TB; Ionica, M; Iriarte, A; Jin, W; Johnson, CA; Kaaret, P; Kieda, D; Kim, B; Kuznetsov, A; Lapington, JS; Licciulli, F; Loporchio, S; Masone, V; Meagher, K; Meures, T; Mode, BAW; Mognet, SAI; Mukherjee, R; Nguyen, T; Nieto, D; Okumura, A; Otte, N; La Palombara, N; Pantaleo, FR; Paoletti, R; Pareschi, G; Petrashyk, A; Di Pierro, F; Pueschel, E; Reynolds, PT; Ribeiro, D; Richards, G; Roache, E; Ross, D; Rousselle, J; Rugliancich, A; Ruíz-Díaz-Soto, J; Santander, M; Schlenstedt, S; Schneider, M; Scuderi, S; Shang, R; Sironi, G; Stevenson, B; Stiaccini, L; Tajima, H; Taylor, LP; Thornhill, J; Tosti, L; Tovmassian, G; Vagelli, V; Valentinoa, M; Vandenbroucke, J; Vassiliev, VV; Di Venere, L; Wakely, SP; Watson, JJ; White, R; Wilcoxa, P; Williams, DA; Wood, M; Yu, P; Zink, A

ASTROPARTICLE PHYSICS 128 巻 2021年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Astroparticle Physics

The Schwarzschild-Couder Telescope (SCT) is a telescope concept proposed for the Cherenkov Telescope Array. It employs a dual-mirror optical design to remove comatic aberrations over an 8∘ field of view, and a high-density silicon photomultiplier camera (with a pixel resolution of 4 arcmin) to record Cherenkov emission from cosmic ray and gamma-ray initiated particle cascades in the atmosphere. The prototype SCT (pSCT), comprising a 9.7 m diameter primary mirror and a partially instrumented camera with 1536 pixels, has been constructed at the Fred Lawrence Whipple Observatory. The telescope was inaugurated in January 2019, with commissioning continuing throughout 2019. We describe the first campaign of observations with the pSCT, conducted in January and February of 2020, and demonstrate the detection of gamma-ray emission from the Crab Nebula with a statistical significance of 8.6σ.

DOI： 10.1016/j.astropartphys.2021.102562

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Silicon photomultiplier (Si-PM) comparisons for low-energy gamma ray readouts with BGO and CsI (Tl) scintillators 査読有り

Takahashi, H; Hirade, N; Uchida, N; Hirose, K; Mizuno, T; Fukazawa, Y; Yamaoka, K; Tajima, H; Ohno, M

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 989 巻 2021年2月

Performance evaluation of GAGG(Ce)/LFS scintillator plus MPPC array readout with ASIC 査読有り

Nobashi, D; Yamaoka, K; Tajima, H; Ito, K

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 986 巻 2021年1月

Technical and scientific performance of the prototype Schwarzschild-Couder Telescope for CTA 査読有り国際共著国際誌

Adams, CB; Ambrosi, G; Ambrosio, M; Aramo, C; Batista, PI; Benbow, W; Bertucci, B; Bissaldi, E; Bitossi, M; Boiano, A; Bonavolontà, C; Bose, R; Brill, A; Brown, AM; Buckley, JH; Canestrari, R; Capasso, M; Caprai, M; Covault, CE; De Paoli, D; Di Venere, L; Errando, M; Fegan, S; Feng, Q; Fiandrini, E; Furniss, A; Gent, A; Giglietto, N; Giordano, F; Giro, E; Halliday, R; Hervet, O; Holder, J; Humensky, TB; Incardona, S; Ionica, M; Jin, W; Kieda, DB; Licciulli, F; Loporchio, S; Marsella, G; Masone, V; Meagher, K; Meures, T; Mode, BAW; Mognet, SAI; Mukherjee, R; Nieto, D; Okumura, A; Otte, N; Pantaleo, FR; Paoletti, R; Pareschi, G; Di Pierro, F; Pueschel, E; Ribeiro, D; Riitano, L; Roache, E; Ross, D; Rousselle, J; Rugliancich, A; Santander, M; Shang, R; Stiaccini, L; Tajima, H; Taylor, LP; Tosti, L; Tovmassian, G; Tripodo, G; Vagelli, V; Valentino, M; Vanderbrouke, JJ; Vassiliev, VV; Watson, JJ; White, R; Williams, DA; Yu, P; Zink, A

ASTRONOMICAL OPTICS: DESIGN, MANUFACTURE, AND TEST OF SPACE AND GROUND SYSTEMS III 11820 巻 2021年

Origin of the in-orbit instrumental background of the Hard X-ray Imager onboard Hitomi 査読有り

Hagino, K; Odaka, H; Sato, G; Sato, T; Suzuki, H; Mizuno, T; Kawaharada, M; Ohno, M; Nakazawa, K; Kobayashi, SB; Murakami, H; Miyake, K; Asai, M; Koi, T; Madejski, G; Saito, S; Wright, DH; Enoto, T; Fukazawa, Y; Hayashi, K; Kataoka, J; Katsuta, J; Kokubun, M; Laurent, P; Lebrun, F; Limousin, O; Maier, D; Makishima, K; Mori, K; Nakamori, T; Nakano, T; Noda, H; Ohta, M; Sato, R; Tajima, H; Takahashi, H; Takahashi, T; Takeda, S; Tanaka, T; Terada, Y; Uchiyama, H; Uchiyama, Y; Watanabe, S; Yamaoka, K; Yatsu, Y; Yuasa, T

JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS 6 巻 ( 4 ) 2020年10月

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