Author: "Axel Arbet-Engels" - Searchworks@Jio Institute Digital Library Search Results

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1. Fractional Variability—A Tool to Study Blazar Variability

Author: Bernd Schleicher, Axel Arbet-Engels, Dominik Baack, Matteo Balbo, Adrian Biland, Michael Blank, Thomas Bretz, Kai Bruegge, Michael Bulinski, Jens Buss, Manuel Doerr, Daniela Dorner, Dominik Elsaesser, Sergej Grischagin, Dorothee Hildebrand, Lena Linhoff, Karl Mannheim, Sebastian Achim Mueller, Dominik Neise, Andrii Neronov, Maximilian Noethe, Aleksander Paravac, Wolfgang Rhode, Florian Schulz, Kevin Sedlaczek, Amit Shukla, Vitalii Sliusar, Elan von Willert, and Roland Walter
Subjects: blazars, variability, fractional variability, active galactic nuclei, Astronomy, QB1-991
Abstract: Active Galactic Nuclei emit radiation over the whole electromagnetic spectrum up to TeV energies. Blazars are one subtype with their jets pointing towards the observer. One of their typical features is extreme variability on timescales, from minutes to years. The fractional variability is an often used parameter for investigating the degree of variability of a light curve. Different detection methods and sensitivities of the instruments result in differently binned data and light curves with gaps. As they can influence the physics interpretation of the broadband variability, the effects of these differences on the fractional variability need to be studied. In this paper, we study the systematic effects of completeness in time coverage and the sampling rate. Using public data from instruments monitoring blazars in various energy ranges, we study the variability of the bright TeV blazars Mrk 421 and Mrk 501 over the electromagnetic spectrum, taking into account the systematic effects, and compare our findings with previous results. Especially in the TeV range, the fractional variability is higher than in previous studies, which can be explained by the much longer (seven years compared to few weeks) and more complete data sample.
Published: 2019
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2. Flux States of Active Galactic Nuclei

Author: Daniela Dorner, Axel Arbet-Engels, Dominik Baack, Matteo Balbo, Adrian Biland, Michael Blank, Thomas Bretz, Kai Bruegge, Michael Bulinski, Jens Buss, Manuel Doerr, Dominik Elsaesser, Dorothee Hildebrand, Lena Linhoff, Karl Mannheim, Sebastian Achim Mueller, Dominik Neise, Andrii Neronov, Maximilian Noethe, Aleksander Paravac, Wolfgang Rhode, Bernd Schleicher, Florian Schulz, Kevin Sedlaczek, Amit Shukla, Vitalii Sliusar, Elan von Willert, Roland Walter, and FACT Collaboration
Subjects: active galactic nuclei, blazars, monitoring, TeV energies, FACT, flux states, flux distributions, duty cycle, Astronomy, QB1-991
Abstract: Blazars are known to show variability on time scales from minutes to years covering a wide range of flux states. Studying the flux distribution of a source allows for various insights. The shape of the flux distribution can provide information on the nature of the underlying variability processes. The level of a possible quiescent state can be derived from the main part of the distribution that can be described by a Gaussian distribution. Dividing the flux states into quiescent and active, the duty cycle of a source can be calculated. Finally, this allows alerting the multi-wavelength and multi-messenger community in case a source is in an active state. To get consistent and conclusive results from flux distributions, unbiased long-term observations are crucial. Only like this is a complete picture of the variability and flux states, e.g., an all-time quiescent state, possible. In seven years of monitoring of bright TeV blazars, the first G-APD Cherenkov telescope (FACT) has collected a total of more than 11,700 hours of physics data with 1500 hours to 3000 hours per source for Mrk 421, Mrk 501, 1ES 1959+650, and 1ES 2344+51.
Published: 2019
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3. Rapid X-ray Variability in Mkn 421 during a Multiwavelength Campaign

Author: Alex G Markowitz, Krzysztof Nalewajko, Gopal Bhatta, Gulab C Dewangan, Sunil Chandra, Daniela Dorner, Bernd Schleicher, Urszula Pajdosz-Śmierciak, Łukasz Stawarz, Staszek Zola, Michał Ostrowski, Daniele Carosati, Saikruba Krishnan, Rumen Bachev, Erika Benítez, Kosmas Gazeas, David Hiriart, Shao-Ming Hu, Valeri Larionov, Alessandro Marchini, Katsura Matsumoto, A A Nikiforova, Tapio Pursimo, Claudia M Raiteri, Daniel E Reichart, Diego Rodriguez, Evgeni Semkov, Anton Strigachev, Yuki Sugiura, Massimo Villata, James R Webb, Axel Arbet-Engels, Dominik Baack, Matteo Balbo, Adrian Biland, Thomas Bretz, Jens Buss, Laura Eisenberger, Dominik Elsaesser, Dorothee Hildebrand, Roman Iotov, Adelina Kalenski, Karl Mannheim, Alison Mitchell, Dominik Neise, Maximilian Noethe, Aleksander Paravac, Wolfgang Rhode, Vitalii Sliusar, and Roland Walter
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, black hole physics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Mkn 421 [BL Lacertae objects], Astrophysics - Astrophysics of Galaxies, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), active [galaxies], Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics, acceleration of particles
Abstract: The study of short-term variability properties in AGN jets has the potential to shed light on their particle acceleration and emission mechanisms. We report results from a four-day coordinated multi-wavelength campaign on the highly-peaked blazar (HBL) Mkn 421 in 2019 January. We obtained X-ray data from AstroSAT, BVRI photometry with the Whole Earth Blazar Telescope (WEBT), and TeV data from FACT to explore short-term multi-wavelength variability in this HBL. The X-ray continuum is rapidly variable on time-scales of tens of ks. Fractional variability amplitude increases with energy across the synchrotron hump, consistent with previous studies; we interpret this observation in the context of a model with multiple cells whose emission spectra contain cutoffs that follow a power-law distribution. We also performed time-averaged and time-resolved (time-scales of 6 ks) spectral fits; a broken power-law model fits all spectra well; time-resolved spectral fitting reveals the usual hardening when brightening behaviour. Intra-X-ray cross correlations yield evidence for the 0.6-0.8 keV band to likely lead the other bands by an average of 4.6 +- 2.6 ks, but only during the first half of the observation. The source displayed minimal night-to-night variability at all wavebands thus precluding significant interband correlations during our campaign. The broadband SED is modeled well with a standard one-zone leptonic model, yielding jet parameters consistent with those obtained from previous SEDs of this source., This article has been accepted for publication in The Monthly Notices of the Royal Astronomical Society (2022), and is published in Volume 513, Issue 2, pp.1662-1679. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. 19 pages; 12 figures
Published: 2022

4. Searching for VHE gamma-ray emission associated with IceCube neutrino alerts using FACT, H.E.S.S., MAGIC, and VERITAS

Author: Konstancja, Satalecka, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), Matteo, Balbo, Thomas, Bretz, Jens, Buss, Laura, Eisenberger, Dorothee, Hildebrand, Roman, Iotov, Adelina, Kalenski, Dominik, Neise, Maximilian, Noethe, Aleksander, Paravac, Vitalii, Sliusar, Roland, Walter, Rasha, Abbasi, Markus, Ackermann, Jenni, Adams, Juanan, Aguilar, Ahlers, M., Maryon, Ahrens, Cyril Martin Alispach, Antonio Augusto Alves Junior, Najia Moureen Binte Amin, Rui, An, Karen, Andeen, Tyler, Anderson, Gisela, Anton, Carlos, Arguelles, Yosuke, Ashida, Spencer, Axani, Xinhua, Bai, Aswathi Balagopal, V., Anastasia Maria Barbano, Barwick, S. W., Benjamin, Bastian, Vedant, Basu, Sebastian, Baur, Bay, R. C., Beatty, J. J., Becker, K. -H., Julia Becker Tjus, Chiara, Bellenghi, Segev, Benzvi, Berley, D., Besson, D. Z., Gary, Binder, Daniel, Bindig, Blaufuss, E., Summer, Blot, Matthias, Boddenberg, Federico, Bontempo, Jurgen, Borowka, Boser, S., Olga, Botner, Jakob, Bottcher, Etienne, Bourbeau, Federica, Bradascio, Braun, J., Stephanie, Bron, Jannes, Brostean-Kaiser, Sally-Ann, Browne, Alexander, Burgman, Ryan, Burley, Raffaela, Busse, Michael, Campana, Erin, Carnie-Bronca, Chujie, Chen, Dmitry, Chirkin, Koun, Choi, Bryanlee, Clark, Kenneth, Clark, Lew, Classen, Alan, Coleman, Gabriel, Collin, Conrad, J. M., Paul, Coppin, Pablo, Correa, Cowen, D. F., Cross, R., Christian, Dappen, Pranav, Dave, Catherine DE CLERCQ, James, Delaunay, Hans, Dembinski, Kunal, Deoskar, Sam De Ridder, Abhishek, Desai, Paolo, Desiati, Krijn de Vries, Gwenhaël de Wasseige, Meike De With, Tyce, Deyoung, Sukeerthi, Dharani, Alejandro, Diaz, Juan Carlos Diaz-Velez, Markus, Dittmer, Hrvoje, Dujmovic, Matt, Dunkman, Michael, Duvernois, Emily, Dvorak, Thomas, Ehrhardt, Philipp, Eller, Ralph, Engel, Hannah, Erpenbeck, John, Evans, Evenson, P. A., Kwok Lung Fan, Fazely, A. R., Sebastian, Fiedlschuster, Aaron, Fienberg, Kirill, Filimonov, Chad, Finley, Leander, Fischer, Derek, B Fox, Anna, Franckowiak, Elizabeth, Friedman, Alexander, Fritz, Philipp, Furst, Gaisser, T. K., Jay, Gallagher, Erik, Ganster, Alfonso, Garcia, Simone, Garrappa, Gerhardt, L., Ava, Ghadimi, Christian, Glaser, Theo, Glauch, Thorsten, Glusenkamp, Goldschmidt, A., Javier, Gonzalez, Sreetama, Goswami, Darren, Grant, Timoth('(e))e, Gr('(e))goire, Spencer, Griswold, Mehmet, Gunduz, Christoph, Günther, Christian, Haack, Allan, Hallgren, Halliday, R., Halve, L., Halzen, F., Martin Ha Minh, Kael, Hanson, John, Hardin, Harnisch, Alexander A., Andreas, Haungs, Simon, Hauser, Dustin, Hebecker, Helbing, K., Felix, Henningsen, Hettinger, Emma C., Stephanie, Hickford, Joshua, Hignight, Colton, Hill, Hill, G. C., Kara, Hoffman, Ruth, Hoffmann, Tobias, Hoinka, Benjamin, Hokanson-Fasig, Hoshina, K., Feifei, Huang, Matthias, Huber, Thomas, Huber, Klas, Hultqvist, Mirco, Hunnefeld, Raamis, Hussain, Seongjin, In, Nad(`(e))ge, Iovine, Aya, Ishihara, Matti, Jansson, George, Japaridze, Minjin, Jeong, Ben, Jones, Donghwa, Kang, Woosik, Kang, Xinyue, Kang, Alexander, Kappes, David, Kappesser, Timo, Karg, Martina, Karl, Karle, A., Katz, U., Kauer, M., Moritz, Kellermann, Kelley, J. L., Ali, Kheirandish, Ken( extquotesingle)ichi Kin, Thomas, Kintscher, Joanna, Kiryluk, Spencer, Klein, Ramesh, Koirala, Hermann, Kolanoski, Tomas, Kontrimas, Lutz, Kopke, Claudio, Kopper, Sandro, Kopper, Koskinen, D. J., Paras, Koundal, Michael, Kovacevich, Marek, Kowalski, Tetiana, Kozynets, Emma, Kun, Naoko, Kurahashi, Neha, Lad, Cristina Lagunas Gualda, Justin, Lanfranchi, Michael, J Larson, Frederik Hermann Lauber, Jeffrey, Lazar, Jiwoong, Lee, Kayla, Leonard, Agnieszka, Leszczy('(n))ska, Yijia, Li, Massimiliano, Lincetto, Qinrui, Liu, Maria, Liubarska, Elisa, Lohfink, Cristian Jesus Lozano Mariscal, Lu, Lu, Francesco, Lucarelli, Andrew, Ludwig, William, Luszczak, Yang, Lyu, Wing Yan Ma, James, Madsen, Kendall, Mahn, Yuya, Makino, Sarah, Mancina, Ioana Codrina Maris, Maruyama, Reina H., Mase, K., Thomas, Mcelroy, Frank, Mcnally, James Vincent Mead, Meagher, K., Andres, Medina, Maximilian, Meier, Stephan, Meighen-Berger, Jessie, Micallef, Daniela, Mockler, Teresa, Montaruli, Roger, Moore, Morse, R., Marjon, Moulai, Richard, Naab, Ryo, Nagai, Uwe, Naumann, Jannis, Necker, Le Viet Nguyen, Hans, Niederhausen, Mehr, Nisa, Sarah, Nowicki, Dave, Nygren, Anna Obertacke Pollmann, Marie, Oehler, Olivas, A., Erin O( extquotesingle)Sullivan, Hershal, Pandya, Daria, Pankova, Nahee, Park, Grant, Parker, Ek Narayan Paudel, Larissa, Paul, Carlos Perez de los Heros, Lilly, Peters, Saskia, Philippen, Damian, Pieloth, Sarah, Pieper, Martin, Pittermann, Pizzuto, A., Plum, M., Yuiry, Popovych, Alessio, Porcelli, Maria Prado Rodriguez, Buford Price, P., Brandom, Pries, Gerald, Przybylski, Christoph, Raab, Amirreza, Raissi, Mohamed, Rameez, Rawlins, K., Immacolata Carmen Rea, Abdul, Rehman, Ren('(e)), Reimann, Giovanni, Renzi, Elisa, Resconi, Simeon, Reusch, Mike, Richman, Benedikt, Riedel, Ella, Roberts, Sally, Robertson, Gerrit, Roellinghoff, Martin, Rongen, Carsten, Rott, Tim, Ruhe, Dirk, Ryckbosch, Devyn Rysewyk Cantu, Ibrahim, Safa, Julian, Saffer, Sebastian Sanchez Herrera, Alexander, Sandrock, Joakim, Sandroos, Marcos, Santander, Subir, Sarkar, Sourav, Sarkar, Maximilian Karl Scharf, Merlin, Schaufel, Harald, Schieler, Sebastian, Schindler, Schlunder, P., Torsten, Schmidt, Austin, Schneider, Judith, Schneider, Schröder, Frank G., Lisa Johanna Schumacher, Georg, Schwefer, Steve, Sclafani, Seckel, D., Surujhdeo, Seunarine, Ankur, Sharma, Shefali, Shefali, Manuel, Silva, Barbara, Skrzypek, Ben, Smithers, Robert, Snihur, Jan, Soedingrekso, Dennis, Soldin, Christian, Spannfellner, Glenn, Spiczak, Christian, Spiering, Juliana, Stachurska, Michael, Stamatikos, Stanev, T., Robert, Stein, Joeran, Stettner, Steuer, A., Stezelberger, T., Timo, Sturwald, Thomas, Stuttard, Sullivan, G. W., Taboada, I., Frederik, Tenholt, Samvel, Ter-Antonyan, Tilav, S., Franziska, Tischbein, Kirsten, Tollefson, Christoph, Tönnis, Simona, Toscano, Delia, Tosi, Alexander, Trettin, Maria, Tselengidou, Chunfai, Tung, Andrea, Turcati, Roxanne, Turcotte, Colin, Turley, Jean Pierre Twagirayezu, Bunheng, Ty, Martin Unland Elorrieta, Nora, Valtonen-Mattila, Justin, Vandenbroucke, Nick van Eijndhoven, David, Vannerom, Jakob van Santen, Stef, Verpoest, Matthias, Vraeghe, Walck, C., Timothyblake, Watson, Chris, Weaver, Philip, Weigel, Andreas, Weindl, Matthew, Weiss, Jan, Weldert, Chris, Wendt, Johannes, Werthebach, Mark, Weyrauch, Nathan, Whitehorn, Wiebusch, C. H., Dawn, Williams, Martin, Wolf, Kurt, Woschnagg, Gerrit, Wrede, Johan, Wulff, Xianwu, Xu, Yiqian, Xu, Juan Pablo Yanez, Yoshida, S., Shiqi, Yu, Tianlu, Yuan, Zelong, Zhang, Weidong, Jin, Hassan, Abdalla, Felix, Aharonian, Faical, Ait-Benkhali, Oguzhan, Anguener, Cornelia, Arcaro, Celine, Armand, Tom, Armstrong, Halim, Ashkar, Michael, Backes, Vardan, Baghmanyan, Victor Barbosa Martins, Anna, Barnacka, Monica, Barnard, Rowan, Batzofin, Yvonne, Becherini, David, Berge, Konrad, Bernlöhr, Baiyang, Bi, Markus, Boettcher, Catherine, Boisson, Julien, Bolmont, Mathieu de Bony, Mischa, Breuhaus, Robert, Brose, Francois, Brun, Tomasz, Bulik, Thomas, Bylund, Floriane, Cangemi, Sami, Caroff, Sabrina, Casanova, Jaqueline, Catalano, Pauline, Chambery, Tej Bahadur Chand, Andrew, Chen, Garret, Cotter, Malgorzata, Curlo, Jean Damascene Mbarubucyeye, Isak Delberth Davids, James, Davies, Justine, Devin, Arache, Djannati-Ataï, Anton, Dmytriiev, Axel, Donath, Victor, Doroshenko, Lente, Dreyer, Louis Du Plessis, Connor, Duffy, Kathrin, Egberts, Sabrina, Einecke, Gabriel, Emery, Jean-Pierre, Ernenwein, Steven, Fegan, Kirsty, Feijen, Armand, Fiasson, Gaëtan Fichet de Clairfontaine, Gerard, Fontaine, Lott, Frans, Matthias, Fuessling, Stefan, Funk, Stefano, Gabici, Yves, Gallant, Shahede, Ghafourizade, Gianluca, Giavitto, Luca, Giunti, Dorit, Glawion, Jean-Francois, Glicenstein, Marie-H('(e))l(`(e))ne, Grondin, Sumari, Hattingh, Maria, Haupt, German, Hermann, Jim, Hinton, Werner, Hofmann, Clemens, Hoischen, Tim, Holch, Markus, Holler, Dieter, Horns, Zhiqiu, Huang, David, Huber, Mario, Hörbe, Marek, Jamrozy, Felix, Jankowsky, Vikas, Joshi, Ira, Jung, Eli, Kasai, Krzysztof, Katarzynski, Ul(`(i)), Katz, Dmitry, Khangulyan, Bruno, Khelifi, Stefan, Klepser, Wlodek, Kluzniak, Nukri, Komin, Ruslan, Konno, Karl, Kosack, Dmitriy, Kostunin, Michael, Kreter, Ga( (s))per Kukec Mezek, Anu, Kundu, Giovanni, Lamanna, S('(e))bastien Le Stum, Anne, Lemiere, Marianne, Lemoine-Goumard, Jean-Philippe, Lenain, Fabian, Leuschner, Christelle, Levy, Thomas, Lohse, Anna, Luashvili, Iryna, Lypova, Jonathan, Mackey, Jhilik, Majumdar, Denys, Malyshev, Dmitry, Malyshev, Vincent, Marandon, Paolo, Marchegiani, Alexandre, Marcowith, Arnaud, Mares, Guillem Marti( extquotesingle)i-Devesa, Ramin, Marx, Gilles, Maurin, Pieter, Meintjes, Manuel, Meyer, Alison, Mitchell, Rafal, Moderski, Lars, Mohrmann, Alessandro, Montanari, Chris, Moore, Paul, Morris, Emmanuel, Moulin, Jacques, Muller, Thomas, Murach, Kaori, Nakashima, Mathieu Naurois (de), Amid, Nayerhoda, Hambeleleni, Ndiyavala, Jacek, Niemiec, Angel, Noel, Paul O( extquotesingle)Brien, Laenita Lorraine Oberholzer, Stefan, Ohm, Laura, Olivera-Nieto, Emma Ona-Wilhelmi (de), Michal, Ostrowski, Sebastian, Panny, Michael, Panter, Dan, Parsons, Giada, Peron, Santiago, Pita, Vincent, Poireau, Dmitry, Prokhorov, Heike, Prokoph, Gerd, Puehlhofer, Michael, Punch, Andreas, Quirrenbach, Patrick, Reichherzer, Anita, Reimer, Olaf, Reimer, Quentin, Remy, Matthieu, Renaud, Brian, Reville, Frank, Rieger, Carlo, Romoli, Gavin, Rowell, Bronislaw, Rudak, Hector Rueda Ricarte, Edna Ruiz Velasco, Vardan, Sahakian, Simon, Sailer, Heiko, Salzmann, David, Sanchez, Andrea, Santangelo, Manami, Sasaki, Johannes, Schaefer, Hester, Schutte, Ullrich, Schwanke, Fabian, Schüssler, Mohanraj, Senniappan, Albert, Seyffert, Shapopi, Jimmy N. S., Kleopas, Shiningayamwe, Rachel, Simoni, Atreyee, Sinha, Helene, Sol, Hugh, Spackman, Andreas, Specovius, Samuel Timothy Spencer, Marion, Spir-Jacob, Lukasz, Stawarz, Riaan, Steenkamp, Christian, Stegmann, Simon, Steinmassl, Constantin, Steppa, Lei, Sun, Tadayuki, Takahashi, Takaaki, Tanaka, Thomas, Tavernier, Andrew, Taylor, Regis, Terrier, Hannes, Thiersen, Charles, Thorpe-Morgan, Martin, Tluczykont, Lenka, Tomankova, Michelle, Tsirou, Naomi, Tsuji, Richard, Tuffs, Yasunobu, Uchiyama, Johann van der Walt, Christopher van Eldik, Carlo van Rensburg, Brian van Soelen, George, Vasileiadis, Johannes, Veh, Christo, Venter, Pascal, Vincent, Jacco, Vink, Völk, Heinrich J., Stefan, Wagner, Jason John Watson, Felix, Werner, Richard, White, Alicja, Wierzcholska, Yu Wun Wong, Hend, Yassin, Anke, Yusafzai, Michael, Zacharias, Roberta, Zanin, Davit, Zargaryan, Andrzej, Zdziarski, Andreas, Zech, Sylvia, Zhu, Andreas, Zmija, Samuel, Zouari, Natalia, Zywucka, The FACT Collaboration, The H.E.S.S. Collaboration, The IceCube Collaboration, The MAGIC Collaboration, The VERITAS Collaboration, and Współautorami artykułu są członkowie Magic Collaboration, IceCube Collaboration, FACT Collaboration, H.E.S.S. Collaboration, VERITAS Collaboration w liczbie 808
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Point source, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, IACT, Astrophysics, law.invention, High Energy Physics - Experiment, Telescope, High Energy Physics - Experiment (hep-ex), law, HESS - Abteilung Hinton, ddc:530, High Energy Physics::Experiment, MAGIC (telescope), Neutrino, Blazar, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation
Abstract: The realtime follow-up of neutrino events is a promising approach to search for astrophysical neutrino sources. It has so far provided compelling evidence for a neutrino point source: the flaring gamma-ray blazar TXS 0506+056 observed in coincidence with the high-energy neutrino IceCube-170922A detected by IceCube. The detection of very-high-energy gamma rays (VHE, $\mathrm{E} > 100\,\mathrm{GeV}$) from this source helped establish the coincidence and constrained the modeling of the blazar emission at the time of the IceCube event. The four major imaging atmospheric Cherenkov telescope arrays (IACTs) - FACT, H.E.S.S., MAGIC, and VERITAS - operate an active follow-up program of target-of-opportunity observations of neutrino alerts sent by IceCube. This program has two main components. One are the observations of known gamma-ray sources around which a cluster of candidate neutrino events has been identified by IceCube (Gamma-ray Follow-Up, GFU). Second one is the follow-up of single high-energy neutrino candidate events of potential astrophysical origin such as IceCube-170922A. GFU has been recently upgraded by IceCube in collaboration with the IACT groups. We present here recent results from the IACT follow-up programs of IceCube neutrino alerts and a description of the upgraded IceCube GFU system., Presented at the 37th International Cosmic Ray Conference (ICRC 2021). See arXiv:2107.06966 for all IceCube contributions. See arXiv:2108.05257 for all H.E.S.S. contributions
Published: 2022

5. MAGIC observations of HESS J1809-193 using the Very Large Zenith Angle technique at energies above TeV

Author: Wrijupan Bhattacharyya, Chiara Righi, Jordi Delgado, M. I. Martínez, Giacomo D'Amico, Chaitanya Priyadarshi, Manuel Artero, Francesco Longo, Katsuaki Asano, Andrés Baquero, Tomislav Terzić, Maria Victoria Fonseca, Kevin Schmidt, Yusuke Suda, Sidika Merve Colak, Carlo Vigorito, Daniel Kerszberg, Jarred Gershon Green, Davide Depaoli, Monica Vazquez Acosta, Nikola Godinovic, Elia Do Souto Espiñeira, Lena Linhoff, Pratik Majumdar, Leonardo Di Venere, Louis Antonelli, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Stefano Menchiari, Michele Palatiello, Paolo Da Vela, Junko Kushida, David H. Green, Lovro Pavletić, Vandad Fallah Ramazani, Francesco Dazzi, Javier Rico, Tokonatsu Yamamoto, Martin Makariev, Josep M. Paredes, Antonio Stamerra, Martin Will, Vitaly Neustroev, Oscar Blanch, Tihomir Surić, Carolin Wunderlich, John Hoang, Marc Ribó, Santiago Ubach, Iva Šnidarić, Lorenzo Bellizzi, Jorge Otero-Santos, Luca Tosti, Ciro Bigongiari, Markus Garczarczyk, Kazuma Ishio, Seiya Nozaki, Manuel Delfino, Ulisses Barres de Almeida, Marina Manganaro, Manuela Mallamaci, Valerio D'Elia, Satoshi Fukami, Hidetoshi Kubo, Tomohiro Inada, Victor A. Acciari, Yating Chai, Dario Hrupec, Stefan Cikota, Alessandro De Angelis, G. Maneva, Abelardo Moralejo, Elisa Prandini, Elena Moretti, Pawel Gliwny, Nicola Giglietto, Mitsunari Takahashi, Masahiro Teshima, Massimo Persic, Adrian Biland, Konstancja Satalecka, Moritz Hütten, Juan Abel Barrio, Michele Doro, Serena Loporchio, Victoria Moreno, Karl Mannheim, Darko Zarić, Narek Sahakyan, Stefano Truzzi, Lluis Font, Tomohiko Oka, Ashot Chilingarian, Maria-Isabel Bernardos, Alice Donini, Josefa González, Alicia López-Oramas, Bernd Schleicher, Roberto Carosi, Carlos Delgado Mendez, Pablo Peñil, Marcel Strzys, Edgar Molina, Tjark Miener, Giacomo Bonnoli, Kyoshi Nishijima, David Paneque, Davide Miceli, Ana Babić, Simona Paiano, Thomas Schweizer, Simone Mender, Javier Herrera, P. G. Prada Moroni, Alessia Spolon, Alicia Fattorini, Léa Jouvin, Cosimo Nigro, Stefano Ansoldi, Jelena Strišković, Sofia Ventura, Alexander Hahn, Riccardo Paoletti, Markus Gaug, Lara Nava, Saša Mićanović, Alessandra Lamastra, Takeshi Nakamori, Daniel Morcuende, Jose Luis Contreras, Vassil Verguilov, Fabrizio Tavecchio, Barbara De Lotto, Camilla Maggio, Daniela Dorner, Alessio Berti, Eduardo Colombo, Ivana Batković, Vincenzo Vitale, Gaia Vanzo, Axel Arbet Engels, Juan Cortina, Marine Pihet, Petar Temnikov, Koji Noda, Elisa Bernardini, D. Dominis Prester, Hendrik Bökenkamp, Francesco Leone, Jenni Jormanainen, Sargis Gasparyan, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Wolfgang Rhode, Bernardo Machado de Oliveira Fraga, Giovanni Busetto, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, Shunsuke Sakurai, Jose Miguel Miranda, Juliane van Scherpenberg, Matteo Cerruti, Yasushi Fukazawa, Ievgen Vovk, Mosè Mariotti, Ivica Puljak, Saverio Lombardi, Andrea Rugliancich, Ramon J. García López, Marie Karjalainen, Dominik Elsaesser, Razmik Mirzoyan, Damir Lelas, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Zeljka Bosnjak, L. Maraschi, Elina Lindfors, Daniel Mazin, Stefano Covino, Giovanni Ceribella, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Christian Fruck, Yuki Iwamura, Julian Sitarek, Daniela Hadasch, and Yoshiki Ohtani
Subjects: Astroparticle physics, Physics, Supernova, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Cosmic ray, MAGIC (telescope), Astrophysics, Zenith
Abstract: The origin of Galactic Cosmic rays (GCRs), whose spectrum extends to PeV energies, is one of the longest-standing problems in astroparticle physics. One of the main sources of GCRs are regarded to be Supernova remnants (SNRs). While SNRs are known to accelerate protons, so far there is no evidence that SNRs can accelerate CRs to PeV energies. Providing that ~10% of the parent Cosmic ray energy is converted to gamma rays, the gamma-ray spectrum extending up to ~100 TeV would be a signature of a so-called Galactic PeVatron, an object responsible for the production of protons up to the knee of the Cosmic ray spectrum. The current multi-wavelength data indicate that HESS J1809-193 is one of the most promising Galactic PeVatron candidates. So far, no firm identification on the source nature has been established as there are several possible counterparts at lower energies; one of them being SNR G11.0−0.0. We report here the results of an observational campaign performed by the MAGIC telescopes on HESS J1809-193 since 2019 in the very-high-energy gamma-ray domain (E>100 GeV). The data were obtained with the Very Large Zenith Angle (VLZA) technique, which increased the collection area significantly to about one square kilometer. We used ~60 hours of collected VLZA data to explore the spectrum and the morphology of the source at energies above several TeV., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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6. Recent MAGIC results on Galactic binaries

Author: Pablo Peñil, Saša Mićanović, Ivana Batković, Francesco Longo, Sargis Gasparyan, Wolfgang Rhode, Giovanni Busetto, Daniel Kerszberg, Shunsuke Sakurai, Marie Karjalainen, Tomohiko Oka, Mosè Mariotti, Kyoshi Nishijima, Tihomir Surić, Giacomo Bonnoli, Takeshi Nakamori, P. G. Prada Moroni, Matteo Cerruti, Elia Do Souto Espiñeira, Pratik Majumdar, Barbara De Lotto, Yuki Iwamura, Camilla Maggio, Daniela Dorner, Alexander Hahn, Lena Linhoff, Tjark Miener, L. Maraschi, Elina Lindfors, Gaia Vanzo, Dominik Elsaesser, Razmik Mirzoyan, David Paneque, John Hoang, Christian Fruck, Thomas Schweizer, Marc Ribó, Daniel Mazin, Damir Lelas, Jelena Strišković, Yasushi Fukazawa, Daniel Morcuende, Jose Luis Contreras, Dario Hrupec, Manuela Mallamaci, Martin Will, Saverio Lombardi, Manuel Artero, Andrea Rugliancich, Stefano Ansoldi, Jorge Otero-Santos, Petar Temnikov, Koji Noda, Karl Mannheim, Massimo Persic, Lea Heckmann, Francesco Gabriele Saturni, Riccardo Paoletti, Marine Pihet, Marina Manganaro, Elisa Bernardini, Alessandro De Angelis, Markus Gaug, Martin Makariev, Hidetoshi Kubo, Tomohiro Inada, Dorota Sobczyńska, Mitsunari Takahashi, Oscar Blanch, Juan Cortina, Vandad Fallah Ramazani, Alicia López-Oramas, Josep M. Paredes, Louis Antonelli, Antonio Stamerra, Elena Moretti, D. Dominis Prester, Lluis Font, Tomislav Terzić, Seiya Nozaki, Konstancja Satalecka, Michele Doro, Julian Sitarek, Juliane van Scherpenberg, Michele Palatiello, Stefano Covino, Ivica Puljak, Serena Loporchio, Jenni Jormanainen, Daniela Hadasch, Katsuaki Asano, Giacomo D'Amico, Davide Depaoli, Hendrik Bökenkamp, Alice Donini, Bernardo Machado de Oliveira Fraga, Yoshiki Ohtani, Jordi Delgado, Maria Victoria Fonseca, Iva Šnidarić, Ž. Bošnjak, Roberto Carosi, Nikola Godinovic, Lara Nava, Ramon J. García López, Kevin Schmidt, Alessio Berti, Abelardo Moralejo, Giovanni Ceribella, Francesco Dazzi, Fabrizio Tavecchio, Ievgen Vovk, Davide Miceli, Jarred Gershon Green, Takashi Saito, Adrian Biland, Alessia Spolon, Eduardo Colombo, Junko Kushida, Lovro Pavletić, Léa Jouvin, Juan Abel Barrio, Marcel Strzys, Dominik Baack, Axel Arbet Engels, Narek Sahakyan, Vassil Verguilov, Yukiho Kobayashi, Carlos Delgado Mendez, Carolin Wunderlich, Ryuji Takeishi, Bernd Schleicher, Edgar Molina, D. M. Strom, Kari Nilsson, Simone Mender, Javier Herrera, Leonardo Di Venere, Andrés Baquero, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Manuel Delfino, Ulisses Barres de Almeida, Ana Babić, Ciro Bigongiari, Yusuke Suda, Carlo Vigorito, Wrijupan Bhattacharyya, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Luca Tosti, Valerio D'Elia, G. Maneva, Victor A. Acciari, Moritz Hütten, Paolo Da Vela, David H. Green, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, Jose Miguel Miranda, Alessandra Lamastra, Vincenzo Vitale, Josefa González, M. I. Martínez, Maria-Isabel Bernardos, Simona Paiano, Alicia Fattorini, Sidika Merve Colak, Francesco Leone, Monica Vazquez Acosta, Yating Chai, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, Victoria Moreno, Darko Zarić, Satoshi Fukami, Lorenzo Bellizzi, Masahiro Teshima, Cosimo Nigro, Sofia Ventura, Markus Garczarczyk, Kazuma Ishio, Santiago Ubach, Chiara Righi, Elisa Prandini, Chaitanya Priyadarshi, Ashot Chilingarian, Stefano Menchiari, and Stefano Truzzi
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Binary number, MAGIC (telescope), Astrophysics, Compact star, Radiation
Abstract: X-ray and gamma-ray binaries are systems consisting of a compact object and normally a non-degenerate companion star. Most of these sources have been shown to emit radiation in a broad frequency range, from radio up to X-rays and sometimes gamma rays. We report on recent results in very high-energy gamma rays above 100 GeV obtained by the MAGIC Collaboration for the Galactic X-ray binaries MAXI J1820+070 and 1A 0535+262, and the gamma-ray binary HESS J0632+057. Multiwavelength data at lower energies are also provided for a better contextualisation of the sources.
Published: 2022

7. Multiwavelength monitoring of gravitationally lensed blazar QSO B0218+357 between 2016 and 2020

Author: Julian, Sitarek, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andres, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovic, Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo, D'Amico, Valerio, D'Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espineira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garcia Lopez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jimenez Martinez, Jenni, Jormanainen, Lea, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, Lopez-Moya, Alicia, Lopez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mose, Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sasa, Micanovic, Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavletic, Pablo, Penil, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Ribo, Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Iva, Snidaric, Dorota, Sobczynska, Alessia, Spolon, Antonio, Stamerra, Jelena, Striskovic, Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suric, Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zaric, Francesco de Palma, Filippo, D'Ammando, Anna, Barnacka, Kazuhiro, Hada, Sahu, Devendra K., Anne, Lähteenmäki, and And
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract: QSO B0218+357 is currently the only gravitationally lensed source from which very-high-energy (VHE, &100GeV) gamma-ray emission has been detected. We report the multiwavelength monitoring observations of this source performed between 2016 and 2020 in radio interferometry, optical, X-ray and gamma-ray bands. During the monitoring individual flares and hints of enhanced states in optical, X-ray and GeV bands have been observed, and the simultaneous data taken by the MAGIC telescopes allow us to search for the VHE gamma-ray emission associated with these events., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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8. FACT - Database-based Analysis and Spectrum Calculations

Author: Laura Eisenberger, Alison Mitchell, Adelina Kalenski, Adrian Biland, Roland Walter, Dominik Baack, Roman Iotov, Maximilian Noethe, Dominik Neise, Daniela Dorner, Dorothee Hildebrand, Jens Buss, Dominik Elsaesser, Thomas Bretz, Vitalii Sliusar, Wolfgang Rhode, Karl Mannheim, Axel Arbet-Engels, Aleksander Paravac, Matteo Balbo, and Bernd Schleicher
Subjects: Database, Computer science, business.industry, Event (computing), Photodetector, computer.software_genre, law.invention, Telescope, Software, Duty cycle, law, Observatory, Latency (engineering), business, computer, Cherenkov radiation
Abstract: The First G-APD Cherenkov Telescope (FACT) is located at the Observatory Roque de los Muchachos on the Canary island La Palma. It uses the imaging air Cherenkov technique to detect gamma rays. With the help of silicon based photosensors in the camera, FACT is an ideal instrument to monitor a small sample of sources with a good time coverage. The automatic operation of the telescope allows an increase of the duty cycle of the instrument. An SQL database is part of the automatic analysis chain, where data on an event basis are stored. This way of storing the data has a several advantages. It can provide easy web-access to all data with no need of creating different user accounts for the analysers and without using special software. The data selection is done via simple queries to the database. This allows very flexible and powerful queries with, for example, user-defined time binning or background suppression. By using observed and simulated events, the complete analysis chain can be done, including the calculation of the measured energy spectrum. This could also be implemented to the Quick-Look Analysis to provide spectral information during the night with a low latency., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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9. Multi-messenger characterization of Mrk501 during historically low X-ray and gamma-ray activity

Author: Lluis Font, Marcel Strzys, Simone Mender, Javier Herrera, Stefano Covino, Christian Fruck, Tjark Miener, David Paneque, Francesco Dazzi, Andrés Baquero, Vandad Fallah Ramazani, Yusuke Suda, Josep M. Paredes, Antonio Stamerra, Cosimo Nigro, Carlo Vigorito, Jelena Strišković, M. I. Martínez, Giacomo D'Amico, Marcos López-Moya, Wlodek Bednarek, Jarred Gershon Green, Sofia Ventura, Javier Rico, Tokonatsu Yamamoto, Dario Hrupec, Mitsunari Takahashi, Giovanni Ceribella, Federico Di Pierro, Ruben Lopez-Coto, John Hoang, Lorenzo Bellizzi, Wrijupan Bhattacharyya, Vitaly Neustroev, Luca Tosti, Jordi Delgado, Manuel Artero, Kevin Schmidt, Marie Karjalainen, Irene Jiménez Martínez, Jose Miguel Miranda, Tihomir Surić, Michele Palatiello, Chiara Righi, Valerio D'Elia, Yuki Iwamura, Francesco Longo, Ciro Bigongiari, Tomislav Terzić, Daniela Dorner, Yating Chai, Stefan Cikota, Massimo Persic, Pawel Gliwny, Nicola Giglietto, G. Maneva, Iva Šnidarić, Giacomo Bonnoli, Gaia Vanzo, Lena Linhoff, P. G. Prada Moroni, Louis Antonelli, L. Maraschi, Elina Lindfors, Junko Kushida, Lovro Pavletić, Elia Do Souto Espiñeira, Alessandra Lamastra, Vincenzo Vitale, Juliane van Scherpenberg, Chaitanya Priyadarshi, Ivica Puljak, Karl Mannheim, Victoria Moreno, Alicia López-Oramas, Thomas Schweizer, Adrian Biland, Davide Depaoli, Marina Manganaro, Carolin Wunderlich, Darko Zarić, Daniel Mazin, Abelardo Moralejo, Satoshi Fukami, Francesco Leone, Ramon J. García López, Stefano Ansoldi, Julian Sitarek, Riccardo Paoletti, Martin Makariev, Petar Temnikov, Oscar Blanch, Leonardo Di Venere, Koji Noda, Elisa Bernardini, Daniela Hadasch, Katsuaki Asano, Ievgen Vovk, Markus Gaug, Masahiro Teshima, Maria Victoria Fonseca, Alessio Berti, Elena Moretti, Maria-Isabel Bernardos, Stefano Menchiari, Markus Garczarczyk, Konstancja Satalecka, Manuela Mallamaci, Jürgen Besenrieder, Dominik Elsaesser, Francesco Giordano, Antonio Tutone, Yoshiki Ohtani, Victor A. Acciari, Alessandro De Angelis, Bernd Schleicher, Edgar Molina, Paolo Da Vela, Razmik Mirzoyan, Josefa González, Michele Doro, Damir Lelas, Nikola Godinovic, Axel Arbet Engels, Sidika Merve Colak, Lea Heckmann, Francesco Gabriele Saturni, Monica Vazquez Acosta, Moritz Hütten, David H. Green, Takeshi Nakamori, Santiago Ubach, Barbara De Lotto, Dorota Sobczyńska, Zeljka Bosnjak, Tomohiko Oka, Roberto Carosi, Matteo Cerruti, Camilla Maggio, Simona Paiano, Kyoshi Nishijima, Alicia Fattorini, Kazuma Ishio, Yasushi Fukazawa, Elisa Prandini, Ashot Chilingarian, Davide Miceli, Alessia Spolon, Léa Jouvin, Vassil Verguilov, Pratik Majumdar, Daniel Kerszberg, Marc Ribó, Martin Will, Jorge Otero-Santos, Hidetoshi Kubo, Tomohiro Inada, Seiya Nozaki, Juan Abel Barrio, Narek Sahakyan, Carlos Delgado Mendez, Manuel Delfino, Ulisses Barres de Almeida, Ana Babić, Sargis Gasparyan, Daniel Morcuende, Jose Luis Contreras, Wolfgang Rhode, Giovanni Busetto, Juan Cortina, Stefano Truzzi, Pablo Peñil, Hendrik Bökenkamp, Saša Mićanović, Ivana Batković, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Shunsuke Sakurai, Alice Donini, Lara Nava, Fabrizio Tavecchio, Eduardo Colombo, Serena Loporchio, D. Dominis Prester, Jenni Jormanainen, Bernardo Machado de Oliveira Fraga, Alexander Hahn, Marine Pihet, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Mosè Mariotti, Saverio Lombardi, and Andrea Rugliancich
Subjects: Physics, Active galactic nucleus, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Flux, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Universe, Crab Nebula, MAGIC (telescope), Blazar, Astrophysics::Galaxy Astrophysics, media_common
Abstract: Blazars, together with other active galactic nuclei, are the most luminous persistent sources in our universe; and therefore a prime candidate for very-high-energy (>0.2 TeV, VHE) gamma-ray observations. For the two MAGIC telescopes, the Mrk501 galaxy is among the brightest observed blazars due to its proximity. We report a multi-wavelength and multi-messenger study of Mrk501 with data from 2017 to 2020, when Mrk501 showed a VHE flux typically below 10% that of the Crab Nebula. During this time, we performed three long observations with NuSTAR, which characterized the hard X-ray emission during three different low-activity flux levels. This Mrk501 dataset provided the unprecedented opportunity to study multi-wavelength variability and correlations with sensitive instruments during historically low X-ray and VHE gamma-ray emission (below 5% of the Crab Nebula flux in the VHE range), which could be considered as the baseline emission of Mrk501. We complemented the broadband spectral energy distributions (SED) of the identified historically low X-ray and VHE gamma-ray flux with data published by IceCube, in order to evaluate the potential existence of a hadronic component that is stable (or slowly variable), and less visible than the leptonic component that may dominate the emission during typical and flaring activity. In this contribution, we will also describe the evolution of the broadband SED comparing different theoretical scenarios., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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10. Periodicity Analysis of Mrk 501 and Mrk 421 in Gamma Rays

Author: Dominik Neise, Torsten Enßlin, Axel Arbet-Engels, Volodymyr Marchenko, Adrian Biland, Adelina Kalenski, Thomas Bretz, Bernd Schleicher, Laura Eisenberger, Dominik Elsaesser, Matteo Balbo, Daniela Dorner, Wolfgang Rhode, Phillip Arras, Roland Walter, Vincent Eberle, Fabian Theissen, Vitalii Sliusar, Karl Mannheim, Natalia Zywucka, Alison Mitchell, Andrija Kostić, Dorothee Hildebrand, Aleksander Paravac, Mariusz Tarnopolski, Michael Kreter, Manuel Boettcher, Dominik Baack, Roman Iotov, Maximilian Noethe, and Jens Buss
Subjects: Physics, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Light curve, law.invention, Telescope, Binary black hole, law, Quasiperiodic function, Blazar, Cherenkov radiation, Astrophysics::Galaxy Astrophysics
Abstract: Blazars, a subclass of active galactic nuclei (AGNs), are highly variable objects. Quasiperiodic oscillations (QPOs), which might originate from a binary black hole located at the AGN core,have been found in some blazar light curves. For the blazars Mrk 421 and Mrk 501, we test the possible QPO behavior using a variety of methods (generalized Lomb-Scargle periodogram,continuous-time autoregressive moving average models, wavelet scalograms, and A−T plane), studying systematic effects in detail. We use gamma-ray light curves from FACT, a ground-based imaging air Cherenkov telescope. We report herein on a 3 sigma significant QPO in Mrk 421., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022

11. FACT - Highlights from more than Eight Years of Unbiased TeV Monitoring

Author: Adelina Kalenski, Aleksander Paravac, Thomas Bretz, Matteo Balbo, Adrian Biland, Bernd Schleicher, Dominik Elsaesser, Roland Walter, Alison Mitchell, Daniela Dorner, Dorothee Hildebrand, Laura Eisenberger, Karl Mannheim, Jens Buss, Wolfgang Rhode, Dominik Baack, Roman Iotov, Maximilian Noethe, Axel Arbet-Engels, Dominik Neise, and Vitalii Sliusar
Subjects: Telescope, Duty cycle, law, Spectral density, Astronomy, Context (language use), MAGIC (telescope), Blazar, Light curve, Cherenkov radiation, law.invention
Abstract: The First G-APD Cherenkov Telescope (FACT) has been monitoring blazars at TeV energies for more than eight years. Using solid state photo sensors and performing robotic operations results in a maximized duty cycle of the instrument and minimized observational gaps, providing an unprecedented data sample of more than 14700~hours of physics data. With an unbiased observing strategy, a small sample of sources is monitored. Results of an automatic quick-look analysis are published with low latency on an open-access website. Since 2014, close to 150 alerts including 11 astronomer's telegrams have been issued triggering target-of-opportunity observations and a variety of multi-wavelength studies. In 2016, FACT alerted MAGIC to a high state of 1ES 2344+51.4. The combined observations revealed a renewed extreme behaviour of the source. Thanks to target-of-opportunity observations and preplanned campaigns, several rich datasets with combined observations with INTEGRAL, XMM-Newton and AstroSAT are available for Mrk 421. Furthermore, dedicated campaigns each observing season provide multi-wavelength light curves and spectral energy distributions for the brightest blazars. The unprecedented, unbiased TeV data sample also provides the unique chance to study the duty cycle and the long-term spectral and temporal behaviour of the sources, including the search for periodic signals. Studying the long-term variability of Mrk 421 and Mrk 501 in the multi-wavelength context, correlations of different wavelengths are investigated searching for delays. In this presentation, selected highlights from more than eights years of monitoring will be summarized, including results from deep multi-instrument campaigns and long-term studies., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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12. BL Lac object 1ES 0647+250, a decade of MWL observations

Author: Francesco Longo, John Hoang, Cosimo Nigro, Abelardo Moralejo, Elia Do Souto Espiñeira, Sofia Ventura, Lluis Font, Alessandra Lamastra, Josefa González, Alexander Hahn, Manuel Artero, Vincenzo Vitale, Chiara Righi, Martin Makariev, Oscar Blanch, Maria-Isabel Bernardos, Tomislav Terzić, Dominik Elsaesser, Razmik Mirzoyan, Marcel Strzys, Daniel Kerszberg, Marine Pihet, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Serena Loporchio, Damir Lelas, Simone Mender, Javier Herrera, Mosè Mariotti, Francesco Leone, Pratik Majumdar, Julian Sitarek, Davide Depaoli, Stefano Truzzi, Bernd Schleicher, Takeshi Nakamori, Lea Heckmann, Francesco Gabriele Saturni, Saverio Lombardi, Alice Donini, Andrea Rugliancich, Edgar Molina, D. Dominis Prester, Marc Ribó, Katsuaki Asano, Chaitanya Priyadarshi, Alessio Berti, Barbara De Lotto, Daniela Hadasch, Dorota Sobczyńska, Zeljka Bosnjak, Sidika Merve Colak, Monica Vazquez Acosta, Tomohiko Oka, Simona Paiano, Giacomo D'Amico, Lara Nava, Vandad Fallah Ramazani, Maria Victoria Fonseca, Martin Will, Hidetoshi Kubo, Tomohiro Inada, Jorge Otero-Santos, Pablo Peñil, Leonardo Di Venere, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Camilla Maggio, Satoshi Fukami, Alicia Fattorini, Fabrizio Tavecchio, Jenni Jormanainen, Josep M. Paredes, Louis Antonelli, L. Maraschi, Seiya Nozaki, Nikola Godinovic, Axel Arbet Engels, Eduardo Colombo, Adrian Biland, Antonio Stamerra, Elina Lindfors, Yoshiki Ohtani, Jordi Delgado, Marcos López-Moya, Ivica Puljak, Wlodek Bednarek, Federico Di Pierro, Giacomo Bonnoli, Kyoshi Nishijima, Bernardo Machado de Oliveira Fraga, Manuel Delfino, Ulisses Barres de Almeida, Tjark Miener, David Paneque, Daniel Mazin, Tihomir Surić, Ruben Lopez-Coto, Kazuma Ishio, Masahiro Teshima, Jarred Gershon Green, Yating Chai, Kevin Schmidt, P. G. Prada Moroni, Ramon J. García López, Stefan Cikota, Matteo Cerruti, Yusuke Suda, Irene Jiménez Martínez, Pawel Gliwny, Nicola Giglietto, Juan Abel Barrio, Narek Sahakyan, Carlo Vigorito, Ana Babić, Massimo Persic, Jelena Strišković, Marina Manganaro, Andrés Baquero, Jose Miguel Miranda, Victoria Moreno, Lena Linhoff, Saša Mićanović, Ivana Batković, Darko Zarić, Roberto Carosi, Daniel Morcuende, Carolin Wunderlich, Jose Luis Contreras, Elisa Prandini, Juan Cortina, Yasushi Fukazawa, Paolo Da Vela, Yuki Iwamura, Junko Kushida, Carlos Delgado Mendez, Karl Mannheim, Lovro Pavletić, Stefano Covino, Marie Karjalainen, David H. Green, Elena Moretti, Davide Miceli, Francesco Dazzi, Hendrik Bökenkamp, Daniela Dorner, Gaia Vanzo, Santiago Ubach, Konstancja Satalecka, Lorenzo Bellizzi, Alessia Spolon, Manuela Mallamaci, Ashot Chilingarian, Ievgen Vovk, Léa Jouvin, Michele Doro, Alessandro De Angelis, Dario Hrupec, M. I. Martínez, Michele Palatiello, Alicia López-Oramas, Giovanni Ceribella, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Stefano Menchiari, Ciro Bigongiari, Mitsunari Takahashi, Vassil Verguilov, Luca Tosti, Petar Temnikov, Sargis Gasparyan, Koji Noda, Wrijupan Bhattacharyya, Valerio D'Elia, Iva Šnidarić, Elisa Bernardini, Markus Garczarczyk, G. Maneva, Takashi Saito, Juliane van Scherpenberg, Wolfgang Rhode, Giovanni Busetto, Dominik Baack, Yukiho Kobayashi, Christian Fruck, Shunsuke Sakurai, Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Victor A. Acciari, Markus Gaug, and Moritz Hütten
Subjects: Physics, Crab Nebula, Astrophysics::High Energy Astrophysical Phenomena, Flux, Spectral energy distribution, MAGIC (telescope), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Blazar, Spectral line, Redshift, BL Lac object
Abstract: The high-peaked BL Lac object 1ES 0647+250 is one of the few distant blazars detected at very-high-energy (VHE, E>100 GeV) γ rays during non-flaring activity. Its redshift is still uncertain, with a recently proposed lower limit of z>0.29. This blazar was first detected by the MAGIC telescopes between 2009 and 2011 during its low state, displaying a flux of around 2% of the Crab Nebula above 100 GeV, but it has shown several periods of high activity, where the VHE γ-ray flux increased by more than one order of magnitude. The VHE spectra of four observed periods are characterized and the redshift of this source is estimated using the HE and VHE spectral shapes. The multi-wavelength data set collected from 2009 to 2020 introduced in this work will serve as the seed for further studies, including detailed studies of the broad-band spectral energy distribution for different activity levels and multi-band variability and correlation studies., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022

13. Search for Gamma-ray Line emission from Dark Matter annihilation in the Galactic Centre with the MAGIC telescopes

Author: Tomohiro Inada, Ana Babic, Andrés Baquero, Ivana Batković, Josefa Becerra Gonzalez, Jürgen Besenrieder, Hendrik Bökenkamp, Zeljka Bosnjak, Elia Do Souto Espiñeira, Ramon J. García López, Nikola Godinovic, Moritz Hütten, Irene Jiménez Martínez, Ruben Lopez-Coto, Marcos López-Moya, Alicia López-Oramas, Mosè Mariotti, Manel Martinez, Saša Mićanović, Lovro Pavletić, Pablo Peñil, Marc Ribó, Iva Šnidarić, Jelena Strišković, Tihomir Surić, Tomislav Terzic, Darko Zarić, Victor A. Acciari, Stefano Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel Artero, Katsuaki Asano, Dominik Baack, Ana Babić, Ulisses Barres de Almeida, Juan Abel Barrio, Josefa Becerra González, Wlodek Bednarek, Lorenzo Bellizzi, Elisa Bernardini, Maria-Isabel Bernardos, Alessio Berti, Wrijupan Bhattacharyya, Ciro Bigongiari, Adrian Biland, Oscar Blanch, Giacomo Bonnoli, Željka Bošnjak, Giovanni Busetto, Roberto Carosi, Giovanni Ceribella, Matteo Cerruti, Yating Chai, Ashot Agassi Chilingarian, Stefan Cikota, Sidika Merve Colak, Eduardo Colombo, Jose Luis Contreras, Juan Cortina, Stefano Covino, Giacomo D'Amico, Valerio D'Elia, Paolo Da Vela, Francesco Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel Delfino, Jordi Delgado, Carlos Delgado Mendez, Davide Depaoli, Federico Di Pierro, Leonardo Di Venere, Dijana Dominis Prester, Alice Donini, Daniela Dorner, Michele Doro, Dominik Elsaesser, Vandad Fallah Ramazani, Alicia Fattorini, Maria Victoria Fonseca, Lluis Font, Christian Fruck, Satoshi Fukami, Yasushi Fukazawa, Markus Garczarczyk, Sargis Gasparyan, Markus Gaug, Nicola Giglietto, Francesco Giordano, Pawel Gliwny, Nikola Godinović, David Green, Jarred Gershon Green, Daniela Hadasch, Alexander Hahn, Lea Heckmann, Javier Herrera, John Hoang, Dario Hrupec, Kazuma Ishio, Yuki Iwamura, Irene Jimenez-Martinez, Jenni Jormanainen, Léa Jouvin, Marie Karjalainen, Daniel Kerszberg, Yukiho Kobayashi, Hidetoshi Kubo, Junko Kushida, Alessandra Lamastra, Damir LELAS, Francesco Leone, Elina Lindfors, Lena Linhoff, Saverio Lombardi, Francesco Longo, Rubén López-Coto, Serena Loporchio, Bernardo Machado de Oliveira Fraga, Camilla Maggio, Pratik Majumdar, Martin MAKARIEV, Manuela Mallamaci, Galina Maneva, Marina Manganaro, Karl Mannheim, Laura Maraschi, Manel Martínez, Daniel Mazin, Stefano Menchiari, Simone Mender, Davide Miceli, Tjark Miener, Jose Miguel Miranda, Razmik Mirzoyan, Edgar Molina, Abelardo Moralejo, Daniel Morcuende, Victoria Moreno, Elena Moretti, Takeshi Nakamori, Lara Nava, Vitaly Neustroev, Cosimo Nigro, Kari Nilsson, Kyoshi Nishijima, Koji Noda, Seiya Nozaki, Yoshiki Ohtani, Tomohiko Oka, Jorge Otero-Santos, Simona Paiano, Michele Palatiello, David Paneque, Riccardo Paoletti, Josep M. Paredes, Massimo Persic, Marine Pihet, Pier Giorgio Prada Moroni, Elisa Prandini, Chaitanya Priyadarshi, Ivica Puljak, Wolfgang Rhode, Javier Rico, Chiara Righi, Andrea Rugliancich, Narek Sahakyan, Takayuki Saito, Shunsuke Sakurai, Konstancja Satalecka, Francesco Gabriele Saturni, Bernd Schleicher, Kevin Schmidt, Thomas Schweizer, Julian Sitarek, Dorota Sobczyńska, Alessia Spolon, Antonio Stamerra, Derek Strom, Marcel C. Strzys, Yusuke Suda, Mitsunari Takahashi, Ryuji Takeishi, Fabrizio Tavecchio, Petar Temnikov, Tomislav Terzić, Masahiro Teshima, Luca Tosti, Stefano Truzzi, Antonio Tutone, Santiago Ubach, Juliane van Scherpenberg, Gaia Vanzo, Monica VAZQUEZ ACOSTA, Sofia Ventura, Vassil VERGUILOV, Carlo francesco Vigorito, Vincenzo Vitale, Ievgen Vovk, Martin Will, Carolin Wunderlich, Tokonatsu Yamamoto, and Daniele Ninci
Subjects: Physics, Annihilation, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Spectral line, Sky, MAGIC (telescope), Zenith, Astrophysics::Galaxy Astrophysics, media_common
Abstract: We present the first search for dark matter (DM) spectral lines in the Galactic centre (GC) region with the MAGIC telescopes. The MAGIC telescopes, located on the Canary island of La Palma (Spain), are sensitive to gamma rays in the energy range from 50 GeV to 50 TeV. MAGIC has performed indirect DM searches in various astrophysical targets, such as dwarf spheroidal galaxies and clusters of galaxies. Observations at high zenith angles significantly increase the telescopes' collection area and sensitivity for gamma rays in the TeV regime. We present the results obtained with more than 200 hours of high-zenith angle observations of the GC region with MAGIC, which allow us to probe promising heavy SUSY models, and to obtain competitive limits to the DM annihilation cross-section at high DM particle mass, compared to existing constraints. We will discuss how we exploit the data from a complex sky region to search for a line-like DM signature., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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14. MAGIC detection of Geminga: an Inverse Compton tail?

Author: Daniela Dorner, Gaia Vanzo, Louis Antonelli, Giacomo D'Amico, Carolin Wunderlich, Juliane van Scherpenberg, Katsuaki Asano, Mosè Mariotti, Juan Abel Barrio, Petar Temnikov, Jarred Gershon Green, Koji Noda, Serena Loporchio, Narek Sahakyan, Elisa Bernardini, D. Dominis Prester, Jenni Jormanainen, Bernardo Machado de Oliveira Fraga, Maria Victoria Fonseca, Manuel Artero, L. Maraschi, Elina Lindfors, Santiago Ubach, Massimo Persic, Alice Donini, Carlos Delgado Mendez, Daniel Mazin, Alexander Hahn, Marina Manganaro, Saverio Lombardi, Marine Pihet, Nikola Godinovic, Alessio Berti, Ievgen Vovk, Lara Nava, Wrijupan Bhattacharyya, Tomislav Terzić, Andrea Rugliancich, Elena Moretti, Fabrizio Tavecchio, Chiara Righi, Davide Depaoli, Axel Arbet Engels, Eduardo Colombo, Daniel Morcuende, Jose Luis Contreras, Takeshi Nakamori, Jordi Delgado, Giacomo Bonnoli, Tihomir Surić, P. G. Prada Moroni, M. I. Martínez, Pratik Majumdar, Juan Cortina, Barbara De Lotto, Konstancja Satalecka, Markus Garczarczyk, Michele Doro, Marie Karjalainen, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Josefa González, Chaitanya Priyadarshi, Leonardo Di Venere, Camilla Maggio, Martin Will, Victor A. Acciari, Kevin Schmidt, Lena Linhoff, Karl Mannheim, Stefano Menchiari, Jorge Otero-Santos, John Hoang, Hendrik Bökenkamp, Luca Tosti, Shunsuke Sakurai, Satoshi Fukami, Vandad Fallah Ramazani, Takashi Saito, Stefano Truzzi, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Francesco Dazzi, Michele Palatiello, Alicia López-Oramas, Seiya Nozaki, Josep M. Paredes, Moritz Hütten, Matteo Cerruti, Pablo Peñil, Valerio D'Elia, Stefano Covino, Masahiro Teshima, Dominik Baack, Antonio Stamerra, Junko Kushida, Saša Mićanović, G. Maneva, Lluis Font, Lovro Pavletić, Cosimo Nigro, Ivana Batković, Yasushi Fukazawa, Roberto Carosi, Sofia Ventura, Francesco Longo, Adrian Biland, Kazuma Ishio, Maria-Isabel Bernardos, Ivica Puljak, Sidika Merve Colak, Iva Šnidarić, Monica Vazquez Acosta, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Yukiho Kobayashi, Davide Miceli, Giovanni Ceribella, Julian Sitarek, Yusuke Suda, Elisa Prandini, Marcel Strzys, Simona Paiano, Alessia Spolon, Léa Jouvin, Alicia Fattorini, Christian Fruck, Ramon J. García López, Daniela Hadasch, Sargis Gasparyan, Manuela Mallamaci, Carlo Vigorito, Elia Do Souto Espiñeira, Ashot Chilingarian, Simone Mender, Javier Herrera, Alessandro De Angelis, Wolfgang Rhode, Giovanni Busetto, Yoshiki Ohtani, Manuel Delfino, Ulisses Barres de Almeida, Vassil Verguilov, Lorenzo Bellizzi, Tomohiko Oka, Kyoshi Nishijima, Ana Babić, Daniel Kerszberg, Martin Makariev, Oscar Blanch, Dominik Elsaesser, Razmik Mirzoyan, Tjark Miener, David Paneque, Yuki Iwamura, Yating Chai, Damir Lelas, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, Marc Ribó, Lea Heckmann, Francesco Gabriele Saturni, Jelena Strišković, Victoria Moreno, Darko Zarić, Dorota Sobczyńska, Hidetoshi Kubo, Tomohiro Inada, Zeljka Bosnjak, Andrés Baquero, Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Ciro Bigongiari, Abelardo Moralejo, Bernd Schleicher, Edgar Molina, Dario Hrupec, Mitsunari Takahashi, Alessandra Lamastra, Vincenzo Vitale, Francesco Leone, Paolo Da Vela, David H. Green, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, and Jose Miguel Miranda
Subjects: Physics, Range (particle radiation), Pulsar, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Inverse, MAGIC (telescope), Astrophysics, Radiation, Curvature, Vela
Abstract: We report the detection of pulsed emission from the Geminga pulsar (PSR J0633+1746) with the MAGIC Telescopes. After the Crab and Vela pulsars, Geminga is the third one detected in the very high energy domain, and its estimated age of ~340 ky makes it the oldest one. The spectrum derived by MAGIC extends from ~15 GeV to 75 GeV and can be well modeled with a simple, soft power-law function. For energies below 40 GeV it overlaps with Fermi-LAT measurements. Joint fits to MAGIC and Fermi-LAT data disfavour the existence of a sub-exponential cut-off in this energy range. Our results are discussed in the framework of the outer gap accelerator model. Such power-law emission can be interpreted as the transition from curvature radiation to inverse Compton (IC) scattering of charges accelerated in the northern outer gap. The IC component is expected to continue towards higher energies. The model fails to fit the overall shape of the spectrum, indicating that a major review is required. The MAGIC Telescopes are two IACTs on the Canary Island of La Palma. In recent years they have significantly improved their performance below 100 GeV with the introduction of a novel trigger system, the Sum-Trigger-II, which halves the energy threshold of the system.
Published: 2021

15. MAGIC and H.E.S.S. detect VHE gamma rays from the blazar OT081 for the first time: a deep multiwavelength study

Author: Marina, Manganaro, Monica, Seglar-Arroyo, Josefa, Becerra-Gonz('(a))lez, David, Sanchez, Matteo, Cerruti, Fabrizio, Tavecchio, Vandad, Fallah-Ramazani, Ivan, Agudo, Stefano, Ciprini, Alexei Vladimir Filippenko, Esteban-Gutierrez, A., Talvikki, Hovatta, Helen, Jermak, Jorstad, Svetlana G., Kopatskaya, Evgenia N., Larionov, Valeri M., Larionova, L. V., Anne, Lähteenmäki, Alan, Marscher, Morozova, D. A., Marko, Pahljina, Merja, Tornikoski, Yuliya, Troitskaya, Troitsky, I., Francesco, Verrecchia, Xiao, H. B., Weaver, Z. R., Weikang, Zheng, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), and And
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Spectral energy distribution, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, MAGIC (telescope), Astrophysics, Emission spectrum, Light curve, Blazar, Astrophysics::Galaxy Astrophysics, Fermi Gamma-ray Space Telescope
Abstract: OT 081 is a luminous blazar well known for its variability in many energy bands. The very-high-energy (VHE; E >100 GeV) gamma-ray emission from the source was discovered by MAGIC and H.E.S.S. during flaring activity in July 2016, after a trigger from the Large Area Telescope (LAT) onboard the Fermi satellite. By analysing the multiwavelength light curves andthe broadband spectral energy distribution (SED), we study the activity of the source and investigate four individual states of activity in the window from MJD 57575 to 57602. The intrinsic gamma-ray spectrum can be described by a power law with spectral indices of 3.27 ± 0.44(MAGIC)and 3.39 ± 0.58(H.E.S.S.) over energy ranges 60–300 GeV and 120–500 GeV, respectively. The combined contemporaneous high-energy (HE;E >100 MeV) through VHE SED shows curvatureand can be described by a log-parabola shape. A simple one-zone synchrotron self-Compton (SSC)model is not sufficient to describe the broadband SED. The presence of broad emission lines in the optical spectrum of the source challenges the categorisation of OT 081 as a BL Lac and, together with the emission scenarios tested, points to the possibility that the source is transitional in nature between a BL Lac and a flat-spectrum radio quasar.
Published: 2021

16. Follow-up observations of GW170817 with the MAGIC telescopes

Author: Antonio Stamerra, Om Sharan Salafia, Alessio Berti, Stefano Covino, Valerio D'Elia, Davide Miceli, Lara Nava, Barbara Patricelli, Chiara Righi, Susumu Inoue, Lucio Angelo Antonelli, Stefano Ansoldi, Barbara De Lotto, Francesco Longo, Fabrizio Tavecchio, Ana Babic, Josefa Becerra Gonzalez, Zeljka Bosnjak, Nikola Godinovic, Ruben Lopez-Coto, Manel Martinez, Tomislav Terzic, Victor A. Acciari, Axel Arbet Engels, Manuel Artero, Katsuaki Asano, Dominik Baack, Ana Babić, Andrés Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana Batković, Josefa Becerra González, Wlodek Bednarek, Lorenzo Bellizzi, Elisa Bernardini, Maria-Isabel Bernardos, Jürgen Besenrieder, Wrijupan Bhattacharyya, Ciro Bigongiari, Adrian Biland, Oscar Blanch, Hendrik Bökenkamp, Giacomo Bonnoli, Željka Bošnjak, Giovanni Busetto, Roberto Carosi, Giovanni Ceribella, Matteo Cerruti, Yating Chai, Ashot Agassi Chilingarian, Stefan Cikota, Sidika Merve Colak, Eduardo Colombo, Jose Luis Contreras, Juan Cortina, Giacomo D'Amico, Paolo Da Vela, Francesco Dazzi, Alessandro De Angelis, Manuel Delfino, Jordi Delgado, Carlos Delgado Mendez, Davide Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espiñeira, Dijana Dominis Prester, Alice Donini, Daniela Dorner, Michele Doro, Dominik Elsaesser, Vandad Fallah Ramazani, Alicia Fattorini, Maria Victoria Fonseca, Lluis Font, Christian Fruck, Satoshi Fukami, Yasushi Fukazawa, Ramon J. García López, Markus Garczarczyk, Sargis Gasparyan, Markus Gaug, Nicola Giglietto, Francesco Giordano, Pawel Gliwny, Nikola Godinović, David Green, Jarred Gershon Green, Daniela Hadasch, Alexander Hahn, Lea Heckmann, Javier Herrera, John Hoang, Dario Hrupec, Moritz Hütten, Tomohiro Inada, Kazuma Ishio, Yuki Iwamura, Irene Jiménez Martínez, Jenni Jormanainen, Léa Jouvin, Marie Karjalainen, Daniel Kerszberg, Yukiho Kobayashi, Hidetoshi Kubo, Junko Kushida, Alessandra Lamastra, Damir LELAS, Francesco Leone, Elina Lindfors, Lena Linhoff, Saverio Lombardi, Rubén López-Coto, Marcos López-Moya, Alicia López-Oramas, Serena Loporchio, Bernardo Machado de Oliveira Fraga, Camilla Maggio, Pratik Majumdar, Martin MAKARIEV, Manuela Mallamaci, Galina Maneva, Marina Manganaro, Karl Mannheim, Laura Maraschi, Mosè Mariotti, Manel Martínez, Daniel Mazin, Stefano Menchiari, Simone Mender, Saša Mićanović, Tjark Miener, Jose Miguel Miranda, Razmik Mirzoyan, Edgar Molina, Abelardo Moralejo, Daniel Morcuende, Victoria Moreno, Elena Moretti, Takeshi Nakamori, Vitaly Neustroev, Cosimo Nigro, Kari Nilsson, Kyoshi Nishijima, Koji Noda, Seiya Nozaki, Yoshiki Ohtani, Tomohiko Oka, Jorge Otero-Santos, Simona Paiano, Michele Palatiello, David Paneque, Riccardo Paoletti, Josep M. Paredes, Lovro Pavletić, Pablo Peñil, Massimo Persic, Marine Pihet, Pier Giorgio Prada Moroni, Elisa Prandini, Chaitanya Priyadarshi, Ivica Puljak, Wolfgang Rhode, Marc Ribó, Javier Rico, Andrea Rugliancich, Narek Sahakyan, Takayuki Saito, Shunsuke Sakurai, Konstancja Satalecka, Francesco Gabriele Saturni, Bernd Schleicher, Kevin Schmidt, Thomas Schweizer, Julian Sitarek, Iva Šnidarić, Dorota Sobczyńska, Alessia Spolon, Jelena Strišković, Derek Strom, Marcel C. Strzys, Yusuke Suda, Tihomir Surić, Mitsunari Takahashi, Ryuji Takeishi, Petar Temnikov, Tomislav Terzić, Masahiro Teshima, Luca Tosti, Stefano Truzzi, Antonio Tutone, Santiago Ubach, Juliane van Scherpenberg, Gaia Vanzo, Monica VAZQUEZ ACOSTA, Sofia Ventura, Vassil VERGUILOV, Carlo francesco Vigorito, Vincenzo Vitale, Ievgen Vovk, Martin Will, Carolin Wunderlich, Tokonatsu Yamamoto, and Darko Zarić
Subjects: Physics, Neutron star, Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, MAGIC (telescope), Maximum flux, Gamma-ray burst
Abstract: The discovery of the electromagnetic counterpart AT2017gfo and the GRB 170817A, associated to the binary neutron star merger GW170817, was one of the major advances in the study of gamma- ray bursts (GRBs) and the hallmark of the multi-messenger astronomy with gravitational waves. Another breakthrough in GRB physics is represented by the discovery of the highly energetic, teraelectronvolt (TeV) component in the GRB 190114C, possibly an universal component in all GRBs. This conclusion is also suggested by the hint of TeV emission in the short GRB 160821B and a few more events reported in the literature. The missing observational piece is the joint detection of TeV emission and gravitational waves from a short GRB and its progenitor. MAGIC observed the counterpart AT2017gfo as soon as the visibility conditions allowed it, namely from January to June 2018. These observations correspond to the maximum flux level observed in the radio and X-ray bands. The upper limits derived from TeV observations are compared with the modelling of the late non-thermal emission using the multi-frequency SED.
Published: 2021

17. Shedding light on the highest energy emission from GRBs with MAGIC observations

Author: Adrian Biland, Chiara Righi, D. Dominis Prester, Jenni Jormanainen, Tomohiko Oka, Tjark Miener, Chaitanya Priyadarshi, Bernardo Machado de Oliveira Fraga, Sargis Gasparyan, Dominik Elsaesser, Razmik Mirzoyan, David Paneque, Wolfgang Rhode, Damir Lelas, Jordi Delgado, Kyoshi Nishijima, Pratik Majumdar, Lea Heckmann, Giovanni Busetto, Daniela Dorner, Francesco Gabriele Saturni, Kevin Schmidt, Jelena Strišković, Dorota Sobczyńska, Zeljka Bosnjak, Yusuke Suda, Satoshi Fukami, Andrés Baquero, Julian Sitarek, Marina Manganaro, Daniela Hadasch, Yoshiki Ohtani, Carlo Vigorito, Martin Will, Junko Kushida, Gaia Vanzo, Ivica Puljak, Jorge Otero-Santos, Lovro Pavletić, Masahiro Teshima, Javier Rico, Tokonatsu Yamamoto, Kazuma Ishio, Seiya Nozaki, Elena Moretti, Ramon J. García López, Francesco Longo, Katsuaki Asano, Ciro Bigongiari, Vitaly Neustroev, Christian Fruck, Lena Linhoff, Daniel Morcuende, Jose Luis Contreras, Serena Loporchio, Wrijupan Bhattacharyya, Konstancja Satalecka, Michele Doro, M. I. Martínez, Santiago Ubach, Luca Tosti, Maria Victoria Fonseca, Juan Cortina, Petar Temnikov, Koji Noda, Juan Abel Barrio, Manuel Artero, Elisa Bernardini, Alexander Hahn, Abelardo Moralejo, Marie Karjalainen, Valerio D'Elia, Elisa Prandini, Narek Sahakyan, Nikola Godinovic, Tomislav Terzić, Louis Antonelli, Marine Pihet, Michele Palatiello, Manuela Mallamaci, Davide Depaoli, Bernd Schleicher, Hendrik Bökenkamp, Carlos Delgado Mendez, Alessandro De Angelis, G. Maneva, Edgar Molina, Carolin Wunderlich, Elia Do Souto Espiñeira, Daniel Kerszberg, Takashi Saito, Alice Donini, Leonardo Di Venere, Iva Šnidarić, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Victor A. Acciari, John Hoang, Dominik Baack, Matteo Cerruti, Ashot Chilingarian, Moritz Hütten, Lara Nava, Yukiho Kobayashi, Fabrizio Tavecchio, Eduardo Colombo, Takeshi Nakamori, Ryuji Takeishi, Barbara De Lotto, Martin Makariev, D. M. Strom, Kari Nilsson, Yuki Iwamura, Camilla Maggio, Mosè Mariotti, Oscar Blanch, Yasushi Fukazawa, Manuel Delfino, Ulisses Barres de Almeida, Ana Babić, Markus Garczarczyk, Saverio Lombardi, Josefa González, Juliane van Scherpenberg, Andrea Rugliancich, Alessandra Lamastra, Ievgen Vovk, Marc Ribó, Stefano Menchiari, Hidetoshi Kubo, Vincenzo Vitale, Tomohiro Inada, Maria-Isabel Bernardos, Francesco Leone, Simona Paiano, Alicia Fattorini, Massimo Persic, Roberto Carosi, Paolo Da Vela, Lluis Font, Giacomo Bonnoli, David H. Green, Davide Miceli, P. G. Prada Moroni, Marcel Strzys, Francesco Dazzi, Alessia Spolon, Léa Jouvin, Simone Mender, Javier Herrera, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Vassil Verguilov, Ruben Lopez-Coto, Irene Jiménez Martínez, Jose Miguel Miranda, Tihomir Surić, Yating Chai, Karl Mannheim, Stefan Cikota, Alicia López-Oramas, Pawel Gliwny, Nicola Giglietto, Cosimo Nigro, Sofia Ventura, Victoria Moreno, Darko Zarić, Alessio Berti, Axel Arbet Engels, Stefano Covino, Giovanni Ceribella, L. Maraschi, Elina Lindfors, Daniel Mazin, Sidika Merve Colak, Monica Vazquez Acosta, Giacomo D'Amico, Lorenzo Bellizzi, Jarred Gershon Green, Vandad Fallah Ramazani, Josep M. Paredes, Antonio Stamerra, Dario Hrupec, Mitsunari Takahashi, Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Stefano Truzzi, Pablo Peñil, Saša Mićanović, Ivana Batković, Susume Inoue, and Shunsuke Sakurai
Subjects: Physics, High energy, Experimental proof, Orders of magnitude (time), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, MAGIC (telescope), Gamma-ray burst, Energy (signal processing), Cherenkov radiation, Afterglow
Abstract: On 14th January 2019, the MAGIC collaboration achieved the first significant detection at TeV energies of a gamma-ray burst (GRB), namely GRB 190114C. This observation sets the first experimental proof of very high energy (VHE, >~100 GeV) gamma-ray emission in GRBs, after more than 50 years from the first GRB detection and many searches with Cherenkov telescopes in the last decades. The data collected by MAGIC and by more than 20 other ground-based and space-borne instruments, spanning 17 orders of magnitude in energy, revealed a new GeV-TeV emission component in the GRB afterglow. This unprecedented multi-wavelength dataset, including VHE data for the first time, allowed a detailed study of the broadband emission. A one-zone synchrotron-self Compton scenario with internal $\gamma$-$\gamma$ absorption could be used to describe the broadband emission, using parameters compatible with those found in previous studies of GRB afterglows below the GeV energy range. This detection opened a new era in the studies of GRBs, leading to new questions such as the universality of TeV emission in different types of GRBs. In this contribution, we will present the GRB follow-up program performed by the MAGIC collaboration, which started more than 15 years ago. We will highlight the results on GRB 190114C, discuss the implications for GRB physics, and report the latest developments and the prospects for future observations of GRBs with the MAGIC telescopes.
Published: 2021

18. Upper limits on the WIMP annihilation cross section from a joint analysis of dwarf spheroidal satellite galaxy observations with the MAGIC telescopes

Author: Maria-Isabel Bernardos, Lena Linhoff, Simona Paiano, Alice Donini, Alicia Fattorini, Takashi Saito, M. I. Martínez, L. Maraschi, Daniela Dorner, Francesco Dazzi, Daniel Kerszberg, Ryuji Takeishi, Elina Lindfors, Lara Nava, Yating Chai, Francesco Longo, Gaia Vanzo, D. M. Strom, Dominik Baack, Dario Hrupec, Stefan Cikota, Pawel Gliwny, Stefano Menchiari, Daniel Mazin, D. Dominis Prester, Kari Nilsson, Nicola Giglietto, Chiara Righi, John Hoang, Mosè Mariotti, Fabrizio Tavecchio, Juliane van Scherpenberg, Yukiho Kobayashi, Mitsunari Takahashi, Eduardo Colombo, Tjark Miener, Ciro Bigongiari, Jenni Jormanainen, Tihomir Surić, Christian Fruck, Javier Rico, Tokonatsu Yamamoto, David Paneque, Victoria Moreno, Vitaly Neustroev, Lluis Font, Elia Do Souto Espiñeira, Darko Zarić, Matteo Cerruti, Bernardo Machado de Oliveira Fraga, Stefano Covino, Petar Temnikov, Jelena Strišković, Chaitanya Priyadarshi, Manuela Mallamaci, Yasushi Fukazawa, Michele Palatiello, Koji Noda, Saverio Lombardi, Marc Ribó, Elisa Bernardini, Marcel Strzys, Alessandro De Angelis, Martin Makariev, Giacomo Bonnoli, Luca Tosti, Andrea Rugliancich, Manuel Delfino, Ievgen Vovk, P. G. Prada Moroni, Satoshi Fukami, Ulisses Barres de Almeida, Oscar Blanch, Markus Garczarczyk, Giovanni Ceribella, Iva Šnidarić, Simone Mender, Javier Herrera, Josefa González, Sargis Gasparyan, Marina Manganaro, Valerio D'Elia, Thomas Schweizer, Hidetoshi Kubo, Tomohiro Inada, Karl Mannheim, Andrés Baquero, Masahiro Teshima, Julian Sitarek, Sidika Merve Colak, Ana Babić, Katsuaki Asano, Elena Moretti, Tomohiko Oka, Louis Antonelli, Konstancja Satalecka, Alexander Hahn, Michele Doro, Abelardo Moralejo, Monica Vazquez Acosta, Daniela Hadasch, Yuki Iwamura, Alicia López-Oramas, Wolfgang Rhode, Stefano Ansoldi, Maria Victoria Fonseca, Giovanni Busetto, Serena Loporchio, Marine Pihet, G. Maneva, Daniel Morcuende, Jose Luis Contreras, Yoshiki Ohtani, Kyoshi Nishijima, Riccardo Paoletti, Markus Gaug, Stefano Truzzi, Kazuma Ishio, Juan Cortina, Santiago Ubach, Nikola Godinovic, Lorenzo Bellizzi, Jordi Delgado, Bernd Schleicher, Takeshi Nakamori, Adrian Biland, Edgar Molina, Marie Karjalainen, Barbara De Lotto, Hendrik Bökenkamp, Vandad Fallah Ramazani, Massimo Persic, Pablo Peñil, Josep M. Paredes, Antonio Stamerra, Camilla Maggio, Kevin Schmidt, Junko Kushida, Lovro Pavletić, Saša Mićanović, Ivana Batković, D. Ninci, Roberto Carosi, Cosimo Nigro, Davide Miceli, Alessia Spolon, Sofia Ventura, Giacomo D'Amico, Léa Jouvin, Carolin Wunderlich, Vassil Verguilov, Shunsuke Sakurai, Jarred Gershon Green, Dominik Elsaesser, Razmik Mirzoyan, Damir Lelas, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Zeljka Bosnjak, Victor A. Acciari, Ivica Puljak, Moritz Hütten, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ramon J. García López, Ruben Lopez-Coto, Irene Jiménez Martínez, Wrijupan Bhattacharyya, Jose Miguel Miranda, Alessandra Lamastra, Vincenzo Vitale, Alessio Berti, Pratik Majumdar, Yusuke Suda, Francesco Leone, Paolo Da Vela, Axel Arbet Engels, David H. Green, Martin Will, Jorge Otero-Santos, Carlo Vigorito, Seiya Nozaki, Juan Abel Barrio, Narek Sahakyan, Carlos Delgado Mendez, Davide Depaoli, Leonardo Di Venere, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Manuel Artero, Tomislav Terzić, Elisa Prandini, and Ashot Chilingarian
Subjects: Physics, Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Coma (optics), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy, Draco (constellation), WIMP, Satellite galaxy, MAGIC (telescope), Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: Dwarf spheroidal galaxies (dSphs) are among the best candidates to perform indirect searches for DM, having the highest known mass-to-light ratio and being free of astrophysical gamma-ray emitting sources. The Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes, located on the Canary Island of La Palma, have observed a fair amount of optimal dSphs in the recent years. This is the outcome of diversifying the observation strategy in order to avoid possible biases in target selection and to improve previous results. In this contribution we will report on new MAGIC results obtained from 52.1 hours of observation of the Draco dSph in 2018 and 49.5 hours of the Coma Berenices dSph in 2019. We will also present the results of a joint analysis of Draco and Coma Berenices dSphs with other dSphs observed by MAGIC so far. The selected dataset accounts for 354.4 hours of good quality data, resulting in one of the largest dSphs samples ever collected by an array of Cherenkov telescopes. This allows us to derive the most constraining limits from dSphs, among Cherenkov telescopes, on the WIMP annihilation cross section for different annihilation channels in the WIMP mass range 70 GeV to 100 TeV.
Published: 2021

19. #meetTheMAGICians: Science communication and visibility of young researchers

Author: Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Vandad Fallah Ramazani, Josep M. Paredes, Antonio Stamerra, Daniel Kerszberg, Dominik Elsaesser, Stefano Covino, Razmik Mirzoyan, Marcos López-Moya, Elia Do Souto Espiñeira, Jordi Delgado, Katsuaki Asano, Damir Lelas, Juan Abel Barrio, Wlodek Bednarek, Federico Di Pierro, D. Dominis Prester, Lea Heckmann, Francesco Gabriele Saturni, Maria Victoria Fonseca, Sargis Gasparyan, Chiara Righi, Dario Hrupec, Lena Linhoff, Narek Sahakyan, Ciro Bigongiari, Ruben Lopez-Coto, Daniel Morcuende, Jose Luis Contreras, Marc Ribó, Dorota Sobczyńska, Zeljka Bosnjak, Kevin Schmidt, Nikola Godinovic, Jenni Jormanainen, Wolfgang Rhode, Carlos Delgado Mendez, Juan Cortina, Martin Makariev, Serena Loporchio, Stefano Menchiari, Irene Jiménez Martínez, Bernardo Machado de Oliveira Fraga, Ivica Puljak, Giovanni Busetto, Mitsunari Takahashi, Takeshi Nakamori, Giovanni Ceribella, Oscar Blanch, Hidetoshi Kubo, Tomohiro Inada, Barbara De Lotto, Junko Kushida, Lovro Pavletić, Stefano Truzzi, Andrés Baquero, John Hoang, Cosimo Nigro, Camilla Maggio, Sidika Merve Colak, Yusuke Suda, Giacomo Bonnoli, Matteo Cerruti, M. I. Martínez, Daniela Dorner, Gaia Vanzo, Lluis Font, Abelardo Moralejo, Chaitanya Priyadarshi, Jose Miguel Miranda, Pablo Peñil, Ramon J. García López, Sofia Ventura, Hendrik Bökenkamp, Pratik Majumdar, Monica Vazquez Acosta, P. G. Prada Moroni, Carlo Vigorito, Martin Will, Satoshi Fukami, Yasushi Fukazawa, Paolo Da Vela, Petar Temnikov, Marcel Strzys, Koji Noda, Manuela Mallamaci, Jorge Otero-Santos, Bernd Schleicher, Edgar Molina, Louis Antonelli, Saša Mićanović, Elisa Bernardini, Simone Mender, Seiya Nozaki, Javier Herrera, L. Maraschi, Alessandro De Angelis, Elina Lindfors, David H. Green, Alexander Hahn, Marie Karjalainen, Tihomir Surić, Ivana Batković, Ryuji Takeishi, Maria-Isabel Bernardos, Alice Donini, D. M. Strom, Kari Nilsson, Julian Sitarek, Roberto Carosi, Daniel Mazin, Carolin Wunderlich, Manuel Artero, Marine Pihet, Daniela Hadasch, Juliane van Scherpenberg, Giacomo D'Amico, Masahiro Teshima, Lorenzo Bellizzi, Davide Miceli, Tomohiko Oka, Lara Nava, Simona Paiano, Massimo Persic, Alessia Spolon, Yoshiki Ohtani, Alicia Fattorini, Léa Jouvin, Karl Mannheim, Tomislav Terzić, Fabrizio Tavecchio, Ievgen Vovk, Davide Depaoli, Eduardo Colombo, Manuel Delfino, Ulisses Barres de Almeida, Vassil Verguilov, Yating Chai, Alicia López-Oramas, Kyoshi Nishijima, Jarred Gershon Green, Stefan Cikota, Pawel Gliwny, Javier Rico, Tokonatsu Yamamoto, Francesco Dazzi, Nicola Giglietto, Leonardo Di Venere, Ana Babić, Jürgen Besenrieder, Victoria Moreno, Francesco Giordano, Antonio Tutone, Vitaly Neustroev, Darko Zarić, Alessio Berti, Axel Arbet Engels, Luca Tosti, Victor A. Acciari, Santiago Ubach, Shunsuke Sakurai, Valerio D'Elia, Alessandra Lamastra, Vincenzo Vitale, Francesco Leone, Moritz Hütten, G. Maneva, Mosè Mariotti, Adrian Biland, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Wrijupan Bhattacharyya, Saverio Lombardi, Andrea Rugliancich, Yuki Iwamura, Christian Fruck, Josefa González, Tjark Miener, David Paneque, Jelena Strišković, Michele Palatiello, Markus Garczarczyk, Kazuma Ishio, Iva Šnidarić, Elisa Prandini, Ashot Chilingarian, Marina Manganaro, Elena Moretti, Konstancja Satalecka, Michele Doro, and Francesco Longo
Subjects: Computer science, business.industry, Internet privacy, Visibility (geometry), Science communication, business
Published: 2021

20. Multiwavelength observations in 2019-2020 of a new very-high-energy gamma-ray emitter: the flat spectrum radio quasar QSO B1420+326

Author: Davide Depaoli, Davide Miceli, Alessia Spolon, Léa Jouvin, Leonardo Di Venere, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, John Hoang, Vassil Verguilov, Francesco Longo, Jordi Delgado, Vandad Fallah Ramazani, Josep M. Paredes, Alexander Hahn, Luca Tosti, Antonio Stamerra, Kevin Schmidt, Valerio D'Elia, Marine Pihet, Roberto Angioni, G. Maneva, Louis Antonelli, Massimo Persic, Alessio Berti, Giacomo D'Amico, Wrijupan Bhattacharyya, Junko Kushida, Carolin Wunderlich, D. Dominis Prester, Lovro Pavletić, Katsuaki Asano, Markus Garczarczyk, Yusuke Suda, Elia Do Souto Espiñeira, Abelardo Moralejo, Victor A. Acciari, Axel Arbet Engels, Jenni Jormanainen, Monica Orienti, Maria Victoria Fonseca, Moritz Hütten, Takashi Saito, Carlo Vigorito, Stefano Menchiari, Bernardo Machado de Oliveira Fraga, Maria-Isabel Bernardos, Daniela Dorner, Adrian Biland, Jarred Gershon Green, Kazuma Ishio, Gaia Vanzo, Yating Chai, Stefan Cikota, Nikola Godinovic, Alessandra Lamastra, Chiara Righi, Dominik Baack, Martin Makariev, Dario Hrupec, Oscar Blanch, Lena Linhoff, Michele Palatiello, Vincenzo Vitale, Roberto Carosi, Cosimo Nigro, Yukiho Kobayashi, Mitsunari Takahashi, Petar Temnikov, Pratik Majumdar, Elisa Prandini, Lluis Font, Koji Noda, Simona Paiano, Sofia Ventura, Alicia Fattorini, Pawel Gliwny, Nicola Giglietto, Elisa Bernardini, Daniel Kerszberg, Stefano Covino, Juliane van Scherpenberg, Francesco Leone, Chaitanya Priyadarshi, Dominik Elsaesser, Manuel Artero, Razmik Mirzoyan, Marcel Strzys, Martin Will, Jorge Otero-Santos, Julian Sitarek, Marcos López-Moya, Tomislav Terzić, Takeshi Nakamori, Ashot Chilingarian, Yuki Iwamura, Marc Ribó, Josefa González, Tihomir Surić, Wlodek Bednarek, Simone Mender, Javier Herrera, Damir Lelas, Barbara De Lotto, Federico Di Pierro, Daniela Hadasch, Ruben Lopez-Coto, Ievgen Vovk, Seiya Nozaki, Svetlana G. Jorstad, Iva Šnidarić, Camilla Maggio, Victoria Moreno, Hidetoshi Kubo, Tomohiro Inada, Irene Jiménez Martínez, Santiago Ubach, M. I. Martínez, Yoshiki Ohtani, Lea Heckmann, Christian Fruck, Francesco Gabriele Saturni, Jose Miguel Miranda, Bernd Schleicher, Darko Zarić, Karl Mannheim, Paolo Da Vela, Satoshi Fukami, David H. Green, Thomas Schweizer, Dorota Sobczyńska, Zeljka Bosnjak, Alicia López-Oramas, Stefano Ansoldi, Juan Abel Barrio, Edgar Molina, Narek Sahakyan, Masahiro Teshima, Shunsuke Sakurai, Riccardo Paoletti, Markus Gaug, Marina Manganaro, Giovanni Ceribella, Stefano Truzzi, Manuela Mallamaci, F. D'Ammando, Pablo Peñil, Alessandro De Angelis, Matteo Cerruti, Carlos Delgado Mendez, Saša Mićanović, Elena Moretti, Ivica Puljak, Ivana Batković, Giacomo Bonnoli, Konstancja Satalecka, P. G. Prada Moroni, Yasushi Fukazawa, Michele Doro, Tomohiko Oka, Kyoshi Nishijima, Sidika Merve Colak, Monica Vazquez Acosta, Sargis Gasparyan, Andrés Baquero, Ramon J. García López, Tjark Miener, David Paneque, Wolfgang Rhode, Francesco Dazzi, Giovanni Busetto, Jelena Strišković, L. Maraschi, Elina Lindfors, Lorenzo Bellizzi, Daniel Mazin, Ciro Bigongiari, Marie Karjalainen, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Daniel Morcuende, Jose Luis Contreras, Juan Cortina, Hendrik Bökenkamp, Serena Loporchio, Manuel Delfino, Ulisses Barres de Almeida, Alice Donini, Ana Babić, Lara Nava, Fabrizio Tavecchio, Eduardo Colombo, Mosè Mariotti, Saverio Lombardi, and Andrea Rugliancich
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Quasar, Optical polarization, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, law.invention, Luminosity, law, Spectral energy distribution, Spectroscopy, Equivalent width, Astrophysics::Galaxy Astrophysics, Flare
Abstract: The flat-spectrum radio quasar QSO B1420+326 underwent an enhanced $\gamma$-ray flux state seen by Fermi-LAT at the turn of 2019/2020. Compared to the low state both the position and luminosity of the two spectral energy distribution peaks changed by at least two orders of magnitude. The high state resulted in the discovery of the very-high-energy (>100 GeV) $\gamma$-ray emission from the source by the MAGIC telescopes. The organized multiwavelength campaign allow us to trace the broadband emission of the source through different phases of the flaring activity. The source was observed by 20 instruments in radio, near-infrared, optical, ultra-violet, X-ray and $\gamma$-ray bands. We use dedicated optical spectroscopy results to estimate the accretion disc and the dust torus luminosity. The optical spectroscopy shows a prominent FeII bump with flux evolving together with the continuum emission and a MgII line with varying equivalent width. The $\gamma$-ray flare was accompanied by a rotation of the optical polarization vector and emission of a new superluminal radio knot. We model spectral energy distributions in different flare phases in the framework of combined synchrotron-self-Compton and external Compton scenario in which the shape of the electron energy distribution is determined from cooling processes.
Published: 2021

21. Studying the Extreme Behaviour of 1ES 2344+51.4

Author: Daniela Dorner, Alexei V. Filippenko, Valeri M. Larionov, Vandad Fallah Ramazani, Vitalii Sliusar, Marina Manganaro, J. A. Acosta-Pulido, C. M. Raiteri, WeiKang Zheng, Axel Arbet-Engels, Matteo Cerruti, and Talvikki Hovatta
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Flux, FOS: Physical sciences, Astrophysics, Redshift, Spectral line, Synchrotron, law.invention, Crab Nebula, 13. Climate action, law, Spectral energy distribution, MAGIC (telescope), Astrophysics - High Energy Astrophysical Phenomena, Flare
Abstract: The BL Lac type object 1ES 2344+51.4 (redshift z = 0.044) was one of the first sources to be included in the extreme high-peaked BL Lac (EHBL) family. EHBLs are characterised by a broadband spectral energy distribution (SED) featuring the synchrotron peak above ∼ 1017 Hz. From previous studies of 1ES 2344+51.4 in the very-high-energy (VHE, >100 GeV) gamma-ray range, its inverse Compton (IC) peak is expected around 200 GeV. 1ES 2344+51.4 was first detected in the VHE range by Whipple in 1995 during a very bright outburst showing around 60% of the flux of the Crab Nebula above 350 GeV. In 1996, during another flare in the X-ray band, observations with Beppo-SAX revealed a large 0.1-10 keV flux variability on timescales of a few hours and an impressive frequency shift of the synchrotron peak to above 1018 Hz. Later on, this extreme behaviour of the source motivated several multiwavelength campaigns, during most of which the source appeared to be in a low state and showing no clear signs of “extremeness”. In August 2016, FACT detected 1ES 2344+51.4 in a high state and triggered multiwavelength observations. The VHE observations show a flux level similar to the historical maximum of 1995. The combination of MAGIC, FACT, and Fermi-LAT spectra provides an unprecedented characterisation of the IC peak. It is the first time that simultaneous HE and VHE data are presented for this object during a flaring episode. We find an atypically hard spectrum in the VHE γ-rays as well as a hard X-ray spectrum, revealing a renewed extreme behaviour., PoS: Proceedings of Science, 358, ISSN:1824-8039, Proceedings of 36th International Cosmic Ray Conference (ICRC 2019)
Published: 2021
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22. Very-high-energy gamma-ray emission from {GRB} 201216C detected by {MAGIC}

Author: Ramon J. García López, Marie Karjalainen, Alessio Berti, Takeshi Nakamori, Manuel Artero, Dominik Elsaesser, Razmik Mirzoyan, Damir Lelas, Barbara De Lotto, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Axel Arbet Engels, Manuel Delfino, Ulisses Barres de Almeida, Javier Rico, Tokonatsu Yamamoto, Camilla Maggio, Lorenzo Bellizzi, Lena Linhoff, Alice Donini, Juliane van Scherpenberg, Tomislav Terzić, Stefano Covino, Tihomir Surić, Dario Hrupec, D. Dominis Prester, Vitaly Neustroev, Daniela Dorner, Gaia Vanzo, Stefano Menchiari, Davide Depaoli, Mitsunari Takahashi, Pratik Majumdar, Kazuma Ishio, Luca Tosti, Chiara Righi, Ana Babić, Lara Nava, Martin Will, Jenni Jormanainen, Roberto Carosi, M. I. Martínez, Ciro Bigongiari, Valerio D'Elia, Alessandra Lamastra, Karl Mannheim, Katsuaki Asano, Yating Chai, Vincenzo Vitale, Jorge Otero-Santos, Francesco Longo, Shunsuke Sakurai, Petar Temnikov, Daniel Kerszberg, Fabrizio Tavecchio, Matteo Cerruti, Elisa Prandini, Bernardo Machado de Oliveira Fraga, G. Maneva, Chaitanya Priyadarshi, Stefan Cikota, Pawel Gliwny, Manuela Mallamaci, Nicola Giglietto, Eduardo Colombo, Seiya Nozaki, Koji Noda, Giovanni Ceribella, Elisa Bernardini, Daniel Morcuende, Jose Luis Contreras, Leonardo Di Venere, Alicia López-Oramas, Alessandro De Angelis, Maria Victoria Fonseca, Tjark Miener, Abelardo Moralejo, Sargis Gasparyan, Juan Cortina, Marc Ribó, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Yasushi Fukazawa, Victoria Moreno, David Paneque, Nikola Godinovic, Massimo Persic, Wolfgang Rhode, Francesco Leone, Giovanni Busetto, Adrian Biland, Santiago Ubach, Juan Abel Barrio, Narek Sahakyan, Elia Do Souto Espiñeira, Stefano Truzzi, Pablo Peñil, Ashot Chilingarian, Hidetoshi Kubo, Tomohiro Inada, Giacomo Bonnoli, Serena Loporchio, Hendrik Bökenkamp, Takashi Saito, Josefa González, John Hoang, Davide Miceli, Tomohiko Oka, Cosimo Nigro, Carlos Delgado Mendez, Lluis Font, Saša Mićanović, Ivana Batković, Dominik Baack, Satoshi Fukami, Bernd Schleicher, P. G. Prada Moroni, Jelena Strišković, Kyoshi Nishijima, Maria-Isabel Bernardos, Edgar Molina, Yukiho Kobayashi, Martin Makariev, Oscar Blanch, Yusuke Suda, Thomas Schweizer, Sofia Ventura, Marcos López-Moya, Ryuji Takeishi, Christian Fruck, L. Maraschi, Elina Lindfors, Stefano Ansoldi, Wlodek Bednarek, Federico Di Pierro, D. M. Strom, Kari Nilsson, Marcel Strzys, Carlo Vigorito, Masahiro Teshima, Alessia Spolon, Léa Jouvin, Vassil Verguilov, Riccardo Paoletti, Daniel Mazin, Simone Mender, Javier Herrera, Markus Gaug, Ievgen Vovk, Alexander Hahn, Giacomo D'Amico, Ruben Lopez-Coto, Andrés Baquero, Francesco Dazzi, Jordi Delgado, Vandad Fallah Ramazani, Josep M. Paredes, Jarred Gershon Green, Marina Manganaro, Marine Pihet, Yuki Iwamura, Antonio Stamerra, Ž. Bošnjak, Markus Garczarczyk, Irene Jiménez Martínez, Elena Moretti, Simona Paiano, Kevin Schmidt, Konstancja Satalecka, Michele Doro, Alicia Fattorini, Jose Miguel Miranda, Michele Palatiello, Junko Kushida, Lovro Pavletić, Paolo Da Vela, Iva Šnidarić, Julian Sitarek, David H. Green, Daniela Hadasch, Yoshiki Ohtani, Louis Antonelli, Carolin Wunderlich, Victor A. Acciari, Moritz Hütten, Wrijupan Bhattacharyya, Darko Zarić, Mosè Mariotti, Saverio Lombardi, Sidika Merve Colak, Monica Vazquez Acosta, Andrea Rugliancich, and Ivica Puljak
Subjects: Physics, High energy, Range (particle radiation), Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics, MAGIC (telescope), Electron, Astrophysics::Cosmology and Extragalactic Astrophysics, Gamma-ray burst, Redshift
Abstract: Gamma-ray bursts (GRBs) are the most energetic phenomena in the Universe. Many aspects of GRB physics are still under debate, such as the origin of their gamma-ray emission above the GeV energy range. In 2019, MAGIC detected TeV gamma rays from the long GRB 190114C, whose emission can be well explained by synchrotron-self Compton emission by relativistic electrons. However, it is still unclear whether such a process is common in GRBs, given the reduced number of GRBs detected until now at the very high energies (VHE). GRB 201216C is a long GRB and is the second one detected by MAGIC in this energy range. After receiving the alert provided by Swift-BAT, MAGIC automatically slewed to the GRB position, starting observations 56 seconds after the GRB onset. In the offline analyses of the collected data, we confirmed the detection of gamma-ray emission with a significance above 5 sigma. Following measurements from optical facilities, the redshift of this GRB was estimated to be 𝑧� = 1.1. This makes GRB 201216C the most distant object ever detected by ground-based gamma-ray telescopes. In this contribution we will show the analysis results of the MAGIC data, also in comparison with past detected GRBs in the same energy range. Finally, accounting for available multi-wavelength observations, we will comment on the possible origin of the VHE emission detected by MAGIC., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2021

23. Studying the long-term spectral and temporal evolution of 1ES 1959$\mathplus$650

Author: Shunsuke, Sakurai, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babi('(c)), Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonz('(a))lez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo Bonnoli, ( (Z))eljka Bo( (s))njak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovi('(c)), David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Rub('(e))n, L('(o))pez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Mart('(i))nez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzi('(c)), Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), Matteo, Balbo, Thomas, Bretz, Jens, Buss, Laura, Eisenberger, Dorothee, Hildebrand, Roman, Iotov, Adelina, Kalenski, Alison, Mitchell, Dominik, Neise, Maximilian, Noethe, Aleksander, Paravac, Vitalii, Sliusar, Roland, Walter, Pietro, Grespan, Mari, Takahashi, Yasuyuki, Nabatame, and And
Published: 2021

24. Multi-epoch monitoring of {TXS} 0506$\mathplus$056 with {MAGIC} and {MWL} partners

Author: Konstancja, Satalecka, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), Tommaso, Aniello, Filippo D( extquotesingle)Ammando, Ilaria, Viale, Talvikki, Hovatta, Edwards, Philip G., Sebastian, Kiehlmann, Anthony, Readhead, Matthias, Kadler, Uwe, Bach, David, Berge, Sara, Buson, Florian, Eppel, Marcello, Giroletti, Olivier, Hervet, Andrea, Gokus, Jonas, He(ss)dörfer, Shoko, Koyama, Alex, Kraus, Thomas, Krichbaum, Raniere de Menezes, Roopesh, Ojha, Giorgios, Paraschos, Elisa, Pueschel, Florian, Rösch, Eduardo, Ros, Jonas, Sinapius, Jörn, Wilms, Michael, Zacharias, Jamie, Stevens, and And
Published: 2021

25. Discovery of TXS 1515-273 at VHE gamma-rays and modelling of its Spectral Energy Distribution

Author: Daniel Kerszberg, Marie Karjalainen, Katsuaki Asano, Alexander Hahn, Davide Depaoli, Tomohiko Oka, Monica Orienti, Sara Cutini, Daniel Morcuende, Maria Victoria Fonseca, Marc Ribó, Jose Luis Contreras, Marine Pihet, Kyoshi Nishijima, Juan Cortina, Nikola Godinovic, Abelardo Moralejo, Hidetoshi Kubo, Tomohiro Inada, Tihomir Surić, Pratik Majumdar, Leonardo Di Venere, Jürgen Besenrieder, Hendrik Bökenkamp, Martin Will, Jorge Otero-Santos, Francesco Giordano, Antonio Tutone, Seiya Nozaki, Dominik Elsaesser, Juan Abel Barrio, Stefano Covino, Stefano Menchiari, Lena Linhoff, Davide Miceli, Dario Hrupec, Mitsunari Takahashi, Narek Sahakyan, Razmik Mirzoyan, Damir Lelas, Lluis Font, Lea Heckmann, Alessia Spolon, Léa Jouvin, Matteo Cerruti, Satoshi Fukami, Carlos Delgado Mendez, Alice Donini, Karl Mannheim, D. Dominis Prester, Bernd Schleicher, Edgar Molina, Jordi Delgado, Takeshi Nakamori, Jenni Jormanainen, Francesco Gabriele Saturni, Manuel Delfino, Ulisses Barres de Almeida, Dorota Sobczyńska, Zeljka Bosnjak, Armin Nabizadeh, Maria-Isabel Bernardos, Giovanni Ceribella, Vassil Verguilov, Bernardo Machado de Oliveira Fraga, Marcel Strzys, Simone Mender, Javier Herrera, Yusuke Suda, Barbara De Lotto, Kevin Schmidt, Yasushi Fukazawa, Alicia López-Oramas, John Hoang, Carlo Vigorito, Camilla Maggio, Daniela Dorner, Lara Nava, Ana Babić, Sidika Merve Colak, Gaia Vanzo, Elisabetta Bissaldi, Ivica Puljak, Ciro Bigongiari, Manuela Mallamaci, Simona Paiano, Thomas Schweizer, Fabrizio Tavecchio, Monica Vazquez Acosta, Eduardo Colombo, Sargis Gasparyan, Junko Kushida, Alessio Berti, Ievgen Vovk, Ramon J. García López, Ryuji Takeishi, D. M. Strom, Stefano Ansoldi, Masahiro Teshima, Alicia Fattorini, Manuel Artero, Riccardo Paoletti, Markus Gaug, Lovro Pavletić, L. Maraschi, Kari Nilsson, Marcos López-Moya, Axel Arbet Engels, M. I. Martínez, Elina Lindfors, Vandad Fallah Ramazani, Josep M. Paredes, Daniel Mazin, Tomislav Terzić, Julian Sitarek, Antonio Stamerra, Francesco Longo, Massimo Persic, Giacomo D'Amico, Daniela Hadasch, Francesco Dazzi, Roberto Carosi, Wolfgang Rhode, Giovanni Busetto, Serena Loporchio, Lorenzo Bellizzi, Cosimo Nigro, Yoshiki Ohtani, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Sofia Ventura, Elia Do Souto Espiñeira, Jarred Gershon Green, Juliane van Scherpenberg, Irene Jiménez Martínez, F. D'Ammando, Andrés Baquero, Jose Miguel Miranda, Martin Makariev, Yating Chai, Oscar Blanch, Paolo Da Vela, Giacomo Bonnoli, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, David H. Green, P. G. Prada Moroni, Victoria Moreno, Darko Zarić, Santiago Ubach, Shunsuke Sakurai, Alessandra Lamastra, Vincenzo Vitale, Francesco Leone, Stefano Truzzi, Pablo Peñil, Saša Mićanović, Mosè Mariotti, Ivana Batković, Chiara Righi, Chaitanya Priyadarshi, Adrian Biland, Saverio Lombardi, Andrea Rugliancich, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Luca Tosti, Valerio D'Elia, G. Maneva, Victor A. Acciari, Moritz Hütten, Kazuma Ishio, Wrijupan Bhattacharyya, Elisa Prandini, Louis Antonelli, Carolin Wunderlich, Ashot Chilingarian, Josefa González, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Christian Fruck, Yuki Iwamura, Markus Garczarczyk, Michele Palatiello, Iva Šnidarić, Tjark Miener, David Paneque, Jelena Strišković, Marina Manganaro, Elena Moretti, Konstancja Satalecka, Michele Doro, Petar Temnikov, Koji Noda, Elisa Bernardini, and Alessandro De Angelis
Subjects: Physics, law, Astrophysics::High Energy Astrophysical Phenomena, Broadband, Gamma ray, Spectral energy distribution, Astrophysics, MAGIC (telescope), Peak location, Blazar, Synchrotron, law.invention
Abstract: In February 2019, a flaring state of the extreme blazar candidate TXS 1515-273 was registered by the Fermi-LAT, which triggered observations with the MAGIC telescopes and the X-ray satellites Swift, XMM-Newton and NuStar. The observations led to the discovery of the source at very-high-energy (VHE, 100 GeV < E < $ 100 TeV) gamma-ray energies and the detection of short time scales of variability (1 h) in several X-ray bands. The analysis of the observed variability helped us to constrain the physical parameters of the emission region. Thanks to the high-quality X-ray data, the synchrotron peak location was determined. The source was classified as a high synchrotron peaked source during the flaring activity. We constructed the broadband spectral energy distribution from radio to TeV. We interpreted it assuming leptonic emission and taking into account the constraints from the X-ray variability. We tested two scenarios: a simple one-zone model and a two-component model. Both models were found to describe the data well from X-ray to VHE gamma ray, but the two-zone model allows for a more accurate modelling of the emission at radio and optical energies.
Published: 2021

26. Protons Spectrum from {MAGIC} Telescopes data

Author: Javier Rico, Tokonatsu Yamamoto, Serena Loporchio, Lorenzo Bellizzi, Vitaly Neustroev, Daniela Dorner, Ivica Puljak, Chiara Righi, Alessandra Lamastra, Alice Donini, Takashi Saito, Lara Nava, Fabrizio Tavecchio, Eduardo Colombo, Davide Depaoli, Luca Tosti, Vincenzo Vitale, Gaia Vanzo, Ryuji Takeishi, D. M. Strom, Lena Linhoff, Dominik Baack, Kari Nilsson, Valerio D'Elia, Kazuma Ishio, Ciro Bigongiari, Jordi Delgado, Wrijupan Bhattacharyya, Ramon J. García López, Stefano Menchiari, Stefano Covino, Leonardo Di Venere, G. Maneva, Francesco Leone, Chaitanya Priyadarshi, Ž. Bošnjak, Yukiho Kobayashi, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Daniel Morcuende, Jose Luis Contreras, Thomas Schweizer, Kevin Schmidt, Juan Abel Barrio, Manuela Mallamaci, Juan Cortina, Lluis Font, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Alessandro De Angelis, Giacomo D'Amico, Paolo Da Vela, Adrian Biland, David H. Green, Giovanni Ceribella, Narek Sahakyan, Petar Temnikov, Koji Noda, Sidika Merve Colak, Elisa Bernardini, Hendrik Bökenkamp, Shunsuke Sakurai, Dominik Elsaesser, Satoshi Fukami, Razmik Mirzoyan, Roberto Carosi, Alexander Hahn, Monica Vazquez Acosta, Marcel Strzys, M. I. Martínez, Elisa Prandini, Daniel Kerszberg, Victor A. Acciari, Damir Lelas, Junko Kushida, Tomohiko Oka, Simone Mender, Manuel Artero, Lovro Pavletić, Javier Herrera, Andrés Baquero, Carlos Delgado Mendez, Marine Pihet, Lea Heckmann, Francesco Gabriele Saturni, Vandad Fallah Ramazani, Cosimo Nigro, Josep M. Paredes, L. Maraschi, Yuki Iwamura, Tomislav Terzić, Elina Lindfors, Kyoshi Nishijima, Manuel Delfino, Ulisses Barres de Almeida, Daniel Mazin, Moritz Hütten, Jarred Gershon Green, Yating Chai, Stefano Truzzi, D. Dominis Prester, Dorota Sobczyńska, Masahiro Teshima, Antonio Stamerra, Sofia Ventura, Abelardo Moralejo, Pablo Peñil, Stefan Cikota, Ana Babić, Pawel Gliwny, Nicola Giglietto, Julian Sitarek, Ashot Chilingarian, Josefa González, Yusuke Suda, Marcos López-Moya, Christian Fruck, Jenni Jormanainen, Victoria Moreno, Francesco Longo, Daniela Hadasch, Wlodek Bednarek, Marc Ribó, Federico Di Pierro, Carlo Vigorito, Maria-Isabel Bernardos, Louis Antonelli, Ruben Lopez-Coto, Pratik Majumdar, Bernardo Machado de Oliveira Fraga, Saša Mićanović, Darko Zarić, Ivana Batković, Giacomo Bonnoli, Yoshiki Ohtani, Santiago Ubach, Massimo Persic, Irene Jiménez Martínez, P. G. Prada Moroni, Marie Karjalainen, Bernd Schleicher, Carolin Wunderlich, Alessio Berti, Martin Will, Hidetoshi Kubo, Tomohiro Inada, Simona Paiano, Edgar Molina, Alicia Fattorini, Davide Miceli, Jorge Otero-Santos, Axel Arbet Engels, Dario Hrupec, Seiya Nozaki, Tihomir Surić, Francesco Dazzi, Alessia Spolon, Mitsunari Takahashi, Léa Jouvin, Elia Do Souto Espiñeira, Sargis Gasparyan, Markus Garczarczyk, Mosè Mariotti, Karl Mannheim, Vassil Verguilov, Wolfgang Rhode, Giovanni Busetto, Alicia López-Oramas, Martin Makariev, Saverio Lombardi, Oscar Blanch, Andrea Rugliancich, Katsuaki Asano, Maria Victoria Fonseca, Nikola Godinovic, John Hoang, Michele Palatiello, Matteo Cerruti, Iva Šnidarić, Marina Manganaro, Yasushi Fukazawa, Elena Moretti, Ievgen Vovk, Takeshi Nakamori, Konstancja Satalecka, Barbara De Lotto, Camilla Maggio, Michele Doro, Tjark Miener, David Paneque, Jelena Strišković, Juliane van Scherpenberg, and Jose Miguel Miranda
Subjects: Physics, COSMIC cancer database, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Cosmic ray, MAGIC (telescope), Nuclear Experiment, Proton energy, Cherenkov radiation, Spectral line
Abstract: Imaging Atmospheric Cherenkov telescopes (IACTs) are designed to detect cosmic gamma rays. As a by-product, IACTs detect Cherenkov flashes generated by millions of hadronic air showers every night. We present the proton energy spectrum from several hundred GeV to several hundred TeV, retrieved from the hadron induced showers detected by the MAGIC telescopes. The protons are discriminated from He and other heavy nuclei by means of using machine learning classification. The energy estimation is based on a specially developed deep neural network regressor. In the last decade, Deep Learning methods gained much interest in the scientific community for their ability to extract complex relations in data and process large datasets in a short time. The proton energy spectrum obtained in this work is compared to the spectra obtained by dedicated cosmic ray experiments.
Published: 2021

27. Monitoring the magnetar {SGR} 1935$\mathplus$2154 with the {MAGIC} telescopes

Author: Alicia, L('(o))pez-Oramas, Irene Jim('(e))nez Mart('(i))nez, Tarek, Hassan, John, Hoang, Susumu, Inoue, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), Filippo, Ambrosino, Alice, Borghese, Francesco Coti Zelati, Hessels, Jason W. T., Franz, Kirsten, Benito, Marcote, Ould-Boukattine, Omar S., Alessandro, Papitto, and Snelders and, Mark P.
Published: 2021

28. The variability patterns of {PG} 1553$\mathplus$113: a {MAGIC} perspective

Author: Elisa, Prandini, Antonio, Stamerra, Talvikki, Hovatta, Tommaso, Aniello, Paolo Da Vela, Luca, Foffano, Ioannis, Liodakis, Kari, Nilsson, Pablo, Pe(~(n))il, Sofia, Ventura, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, and Darko Zari('(c)) and
Published: 2021

29. Multiwavelength variability and correlation studies of Mrk421 during historically low X-ray and $\upgamma$-ray activity in 2015{\textendash}2016

Author: Biswajit, Banerjee, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babi('(c)), Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonz('(a))lez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo Bonnoli, ( (Z))eljka Bo( (s))njak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovi('(c)), David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Rub('(e))n, L('(o))pez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Mart('(i))nez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzi('(c)), Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), Matteo, Balbo, Thomas, Bretz, Jens, Buss, Laura, Eisenberger, Dorothee, Hildebrand, Roman, Iotov, Adelina, Kalenski, Alison, Mitchell, Dominik, Neise, Maximilian, Noethe, Aleksander, Paravac, Vitalii, Sliusar, Roland, Walter, Valverde, J., Horan, D., Giroletti, M., Perri, M., Verrecchia, F., Leto, C., Sadun, A. C., Moody, J. W., Joner, M., Marscher, A. P., Jorstad, S. G., Lähteenmäki, A., ( extasciitilde)Tornikoski, M., Ramakrishnan, V., Järvelä, E., Vera, R. J. C., Righini, S., Lien, A. Y., and And
Published: 2021

30. Understanding the origin of the extended gamma-ray emission and the physical nature of {HESS} J1841-055 using observations at {TeV} energies with the {MAGIC} telescopes

Author: Jordi Delgado, Marcel Strzys, Kevin Schmidt, Josefa González, Ivica Puljak, Simone Mender, Javier Herrera, Lena Linhoff, Junko Kushida, Lovro Pavletić, Louis Antonelli, Ramon J. García López, Manuela Mallamaci, Vandad Fallah Ramazani, Francesco Longo, Alessandro De Angelis, Stefano Truzzi, Josep M. Paredes, Antonio Stamerra, Julian Sitarek, Pablo Peñil, Katsuaki Asano, Carolin Wunderlich, Stefano Menchiari, Maria Victoria Fonseca, Daniela Hadasch, Kazuma Ishio, Markus Garczarczyk, Elia Do Souto Espiñeira, Lab Saha, Elisa Prandini, Tihomir Surić, Yoshiki Ohtani, Nikola Godinovic, Saša Mićanović, Marcos López-Moya, Ashot Chilingarian, Christian Fruck, Yating Chai, Stefan Cikota, Alexander Hahn, Martin Makariev, Mosè Mariotti, John Hoang, Wlodek Bednarek, Federico Di Pierro, Oscar Blanch, Pawel Gliwny, Marine Pihet, Ivana Batković, Nicola Giglietto, Dominik Elsaesser, Serena Loporchio, Razmik Mirzoyan, Davide Depaoli, Damir Lelas, Tomohiko Oka, D. Dominis Prester, Karl Mannheim, Wrijupan Bhattacharyya, Massimo Persic, Ruben Lopez-Coto, Andrés Baquero, Alice Donini, Kyoshi Nishijima, Victoria Moreno, Jenni Jormanainen, Saverio Lombardi, Darko Zarić, Alicia López-Oramas, Lea Heckmann, Irene Jiménez Martínez, Francesco Gabriele Saturni, Juan Abel Barrio, Thomas Schweizer, Francesco Dazzi, Dorota Sobczyńska, Zeljka Bosnjak, Tjark Miener, David Paneque, Bernardo Machado de Oliveira Fraga, Lara Nava, Andrea Rugliancich, Victor A. Acciari, Maria-Isabel Bernardos, Narek Sahakyan, Stefano Ansoldi, Jose Miguel Miranda, Riccardo Paoletti, Fabrizio Tavecchio, Moritz Hütten, Markus Gaug, Ciro Bigongiari, Eduardo Colombo, Cosimo Nigro, Jelena Strišković, Marina Manganaro, Sofia Ventura, Leonardo Di Venere, Lorenzo Bellizzi, Abelardo Moralejo, Sargis Gasparyan, Marie Karjalainen, Carlos Delgado Mendez, Wolfgang Rhode, Giovanni Busetto, Simona Paiano, Alicia Fattorini, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Alessandra Lamastra, Elena Moretti, Bernd Schleicher, Giacomo Bonnoli, Edgar Molina, P. G. Prada Moroni, Konstancja Satalecka, M. I. Martínez, Alessio Berti, Vincenzo Vitale, Daniel Morcuende, Jose Luis Contreras, Michele Doro, Axel Arbet Engels, Shunsuke Sakurai, Juan Cortina, Sidika Merve Colak, Michele Palatiello, Monica Vazquez Acosta, Yuki Iwamura, Pratik Majumdar, Hendrik Bökenkamp, Francesco Leone, Martin Will, Jorge Otero-Santos, Iva Šnidarić, Yusuke Suda, Seiya Nozaki, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Paolo Da Vela, Carlo Vigorito, David H. Green, Takashi Saito, Manuel Delfino, Ulisses Barres de Almeida, Dominik Baack, Yukiho Kobayashi, Ana Babić, Manuel Artero, Tomislav Terzić, Roberto Carosi, Davide Miceli, Alessia Spolon, Léa Jouvin, Vassil Verguilov, Daniel Kerszberg, Marc Ribó, Hidetoshi Kubo, Tomohiro Inada, Adrian Biland, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Luca Tosti, Valerio D'Elia, G. Maneva, Daniela Dorner, Gaia Vanzo, Petar Temnikov, Koji Noda, Elisa Bernardini, Takeshi Nakamori, Barbara De Lotto, Camilla Maggio, Satoshi Fukami, Masahiro Teshima, Chiara Righi, Chaitanya Priyadarshi, Santiago Ubach, Giacomo D'Amico, Jarred Gershon Green, Dario Hrupec, Mitsunari Takahashi, Stefano Covino, Giovanni Ceribella, L. Maraschi, Elina Lindfors, Daniel Mazin, Matteo Cerruti, Yasushi Fukazawa, Juliane van Scherpenberg, Ievgen Vovk, and Lluis Font
Subjects: Physics, Wavelength, Previous generation, High energy, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, MAGIC (telescope), Astrophysics
Abstract: With the improved sensitivity with respect to the previous generation, current space-borne and ground-based gamma-ray telescopes have made the number of γ-ray sources detected at GeV- TeV energies increase many folds over the last decade. Many of the detected extended gamma-ray sources are not associated with any known sources at other wavelengths. Understanding the nature of these sources and the origin of the observed high energy gamma-ray emission remains a great challenge. Using the MAGIC telescopes, we have observed one such unassociated gamma-ray source, named HESS J1841-055 at TeV energies. We investigate the physical nature and origin of the γ-ray emission from this extended source. In this paper, we present the results of our detailed investigation on this source using MAGIC data and other multi-waveband information on nearby sources. The results included in this proceeding and shown in this presentation were published in ref. [1]. The details about the analysis, interpretation and modelling can be found in the aforementioned reference.
Published: 2021

31. Analysis of the W 44 Supernova Remnant and its surroundings with Fermi-{LAT} and {MAGIC}

Author: Leonardo Di Venere, Riccardo Di Tria, Francesco, Giordano, David, Green, Alexander, Hahn, Pantaleo, Francesca Romana, Marcel, Strzys, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Giacomo D( extquotesingle)Amico, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Pawel, Gliwny, Nikola, Godinovic, Jarred Gershon Green, Daniela, Hadasch, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), and And
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Angular resolution, Cosmic ray, MAGIC (telescope), Astrophysics, Diffusion (business), Supernova remnant, Spectral line, Fermi Gamma-ray Space Telescope
Abstract: The well-known supernova remnant (SNR) W 44 is observed in high-energy gamma rays and widely studied to investigate cosmic ray (CR) acceleration. Several analyses of the W 44 surroundings showed the presence of gamma-ray emission offset from the radio SNR shell. This emission is thought to originate from escaped high-energy CRs. We present a detailed analysis of the W 44 region as seen by Fermi-LAT, focusing on the spatial and spectral characteristics of both W44 SNR and its surroundings. The spatial analysis was limited to energies above 1 GeV in order to exploit the improved angular resolution of the instrument, deriving a detailed description of the region morphology. Observations of the north-western region of W 44, also known as SRC-1 from previous works, were conducted with the MAGIC telescopes in the very high-energy gamma-ray band. We analysed MAGIC data exploiting the spatial information derived with the Fermi-LAT analysis at GeV energies. Here we show the results of both analyses and the combined Fermi-LAT and MAGIC spectra, thus obtaining constraining information on the diffusion of the escaped CRs.
Published: 2021

32. Multi-epoch monitoring of TXS 0506+056 with MAGIC and MWL partners

Author: Ivica Puljak, Josefa González, Ciro Bigongiari, Davide Miceli, Alessia Spolon, Léa Jouvin, Chiara Righi, Marina Manganaro, Ievgen Vovk, Yusuke Suda, Elena Moretti, Sargis Gasparyan, Vassil Verguilov, Ramon J. García López, Pratik Majumdar, Carlo Vigorito, Marcos López-Moya, Wlodek Bednarek, Dario Hrupec, Konstancja Satalecka, Juliane van Scherpenberg, Federico Di Pierro, Michele Doro, Javier Rico, Tokonatsu Yamamoto, Wolfgang Rhode, Giovanni Busetto, Vitaly Neustroev, Lorenzo Bellizzi, Ruben Lopez-Coto, John Hoang, Martin Will, Thomas Schweizer, Florian Eppel, Kazuma Ishio, F. D'Ammando, Mitsunari Takahashi, Luca Tosti, Raniere de Menezes, Davide Depaoli, Jorge Otero-Santos, Christian Fruck, Irene Jiménez Martínez, Marcello Giroletti, Andrés Baquero, Matteo Cerruti, Valerio D'Elia, Chaitanya Priyadarshi, Stefano Ansoldi, Seiya Nozaki, Yasushi Fukazawa, Sara Buson, Sebastian Kiehlmann, Jamie Stevens, Alessio Berti, Elisa Prandini, G. Maneva, Florian Rösch, Tjark Miener, Philip G. Edwards, Takeshi Nakamori, Jose Miguel Miranda, David Paneque, Alexander Hahn, Riccardo Paoletti, Markus Gaug, Shoko Koyama, Abelardo Moralejo, Barbara De Lotto, Leonardo Di Venere, Jelena Strišković, Tomohiko Oka, Giacomo Bonnoli, Adrian Biland, Juan Abel Barrio, Camilla Maggio, Michele Palatiello, Roberto Carosi, Jonas Heßdörfer, P. G. Prada Moroni, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Alessandra Lamastra, Narek Sahakyan, Kyoshi Nishijima, Shunsuke Sakurai, Daniel Kerszberg, Santiago Ubach, Marine Pihet, Axel Arbet Engels, Vincenzo Vitale, Manuel Delfino, Ulisses Barres de Almeida, Iva Šnidarić, Georgios Paraschos, Sidika Merve Colak, Stefano Truzzi, Lena Linhoff, Maria-Isabel Bernardos, Olivier Hervet, Pablo Peñil, Ashot Chilingarian, Monica Vazquez Acosta, Telamon, Marie Karjalainen, Bernd Schleicher, Matthias Kadler, Stefano Menchiari, Saša Mićanović, D. Dominis Prester, Edgar Molina, Elisa Pueschel, Ivana Batković, Carlos Delgado Mendez, Satoshi Fukami, Takashi Saito, Manuel Artero, Marc Ribó, Jonas Sinapius, Ilaria Viale, Francesco Leone, Vandad Fallah Ramazani, Josep M. Paredes, Antonio Stamerra, Manuela Mallamaci, Alessandro De Angelis, Katsuaki Asano, Jenni Jormanainen, Anthony C. S. Readhead, Dominik Baack, Yating Chai, Hidetoshi Kubo, Tomohiro Inada, Masahiro Teshima, Alice Donini, Ana Babić, Bernardo Machado de Oliveira Fraga, Tomislav Terzić, Simona Paiano, Cosimo Nigro, Lluis Font, Stefan Cikota, Paolo Da Vela, Pawel Gliwny, Julian Sitarek, Nicola Giglietto, Yukiho Kobayashi, Roopesh Ojha, Markus Garczarczyk, L. Maraschi, Sofia Ventura, Alicia Fattorini, Elina Lindfors, David H. Green, Victoria Moreno, Darko Zarić, D. Berge, Daniel Morcuende, Jose Luis Contreras, Eduardo Ros, Alex Kraus, Lara Nava, M. I. Martínez, Dominik Elsaesser, Andrea Gokus, Thomas P. Krichbaum, Francesco Dazzi, Tihomir Surić, Fabrizio Tavecchio, Razmik Mirzoyan, Michael Zacharias, Juan Cortina, Marcel Strzys, Giacomo D'Amico, Eduardo Colombo, Damir Lelas, Daniel Mazin, Yuki Iwamura, Maria Victoria Fonseca, Daniela Dorner, Lea Heckmann, Francesco Gabriele Saturni, Simone Mender, Javier Herrera, Hendrik Bökenkamp, Dorota Sobczyńska, Zeljka Bosnjak, Gaia Vanzo, Karl Mannheim, Jarred Gershon Green, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Daniela Hadasch, Alicia López-Oramas, Serena Loporchio, Nikola Godinovic, Massimo Persic, Petar Temnikov, Stefano Covino, Koji Noda, Elisa Bernardini, Giovanni Ceribella, Yoshiki Ohtani, Francesco Longo, Jordi Delgado, Elia Do Souto Espiñeira, Uwe Bach, Jörn Wilms, Kevin Schmidt, Talvikki Hovatta, Martin Makariev, Oscar Blanch, Junko Kushida, Lovro Pavletić, Wrijupan Bhattacharyya, Victor A. Acciari, Moritz Hütten, Louis Antonelli, Carolin Wunderlich, Mosè Mariotti, Tommaso Aniello, Saverio Lombardi, and Andrea Rugliancich
Subjects: Physics, Epoch (reference date), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Magic (paranormal), media_common
Abstract: The measurement of an astrophysical flux of high-energy neutrinos by IceCube is an important step towards finding the long-sought sources of cosmic rays. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. The real-time followup of neutrino events turned out to be the most successful approach in neutrino point-source searches. It brought, among others, the most compelling evidence for a neutrino point source: the flaring gamma-ray blazar TXS 0506+056 in coincidence with a single high-energy neutrino from IceCube (IceCube-170922A). The fast multiwavelength(MWL) follow-up of this alert was key for establishing this coincidence and constraining the subsequent theoretical modeling for this event. In the long run, accurate and contemporaneous MWL spectral measurements are essential ingredients in investigating the physical processes leading to particle acceleration and emission of radiation. A deeper understanding of those processes allows us to put constraints on the potential neutrino emission. Here we present the light curves and simultaneous spectral energy distributions from November 2017 till February 2021 of MAGIC and MWL monitoring of TXS 0506+056. The more than the two year-long rise and high state of the radio light curve of TXS 0506+056, which started near the time of the IceCube neutrino detection, seems to have ended, as indicated by a steep decrease in the first half of 2021. We also present the theoretical interpretation of our observations., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2021

33. 5.5 years multi-wavelength variability of Mrk 421: evidences of leptonic emission from the radio to TeV

Author: Adrian Biland, Dominik Baack, Roman Iotov, Marvin Beck, Maximilian Noethe, Thomas Bretz, Daniela Dorner, Jens Buss, Michael Blank, Karl Mannheim, Axel Arbet-Engels, Wolfgang Rhode, Amit Shukla, Bernd Schleicher, Matteo Balbo, Vitalii Sliusar, Dominik Elsaesser, Dominik Neise, Manuel Doerr, M. Bulinski, Dorothee Hildebrand, Aleksander Paravac, K. Sedlaczek, K. Bruegge, Laurits Tani, Marc Klinger, Fabian Theissen, and Roland Walter
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, High Energy Physics::Experiment, Multi wavelength, Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract: Mrk 421 is a high-synchrotron-peaked blazar featuring bright and persistent GeV and TeV emission. We use the longest and densest ongoing unbiased observing campaign obtained at TeV and GeV energies during 5.5 years with the FACT telescope and the Fermi-LAT detector. The contemporaneous multi-wavelength observations were used to characterize the variability of the source and to constrain the underlying physical mechanisms. We study and correlate light curves obtained by nine different instruments from radio to gamma rays and found two significant results. The TeV and X-ray light curves are very well correlated with lag, if any, shorter than a day. The GeV light curve varies independently and accurately leads the variations observed at long wavelengths, in particular in the radio band. We find that the observations match the predictions of leptonic models and suggest that the physical conditions vary along the jet, when the emitting region moves outwards., PoS: Proceedings of Science, 354, ISSN:1824-8039, Proceedings of High Energy Phenomena in Relativistic Outflows VII PoS (HEPRO VII9)
Published: 2020

34. Long-term multi-band photometric monitoring of Mrk 501

Author: Bernd Schleicher, Adrian Biland, Dorothee Hildebrand, Dominik Elsaesser, Jens Buss, Daniela Dorner, Laura Eisenberger, Alison Mitchell, Adelina Kalenski, Axel Arbet-Engels, Karl Mannheim, Matteo Balbo, Aleksander Paravac, Dominik Baack, Roland Walter, Roman Iotov, Maximilian Noethe, Dominik Neise, Thomas Bretz, Wolfgang Rhode, and Vitalii Sliusar
Subjects: Photon, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, law.invention, Telescope, law, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, Cherenkov radiation, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Computer Science::Information Retrieval, Compton scattering, Astronomy and Astrophysics, Light curve, Astrophysics - Astrophysics of Galaxies, Synchrotron, 3. Good health, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Precession, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Radio-to-TeV observations of the bright nearby (z=0.034) blazar Markarian 501 (Mrk 501), performed from December 2012 to April 2018, are used to study the emission mechanisms in its relativistic jet. We examined the multi-wavelength variability and the correlations of the light curves obtained by eight different instruments, including the First G-APD Cherenkov Telescope (FACT), observing Mrk 501 in very high-energy (VHE) gamma-rays at TeV energies. We identified individual TeV and X-ray flares and found a sub-day lag between variability in these two bands. Simultaneous TeV and X-ray variations with almost zero lag are consistent with synchrotron self-Compton (SSC) emission, where TeV photons are produced through inverse Compton scattering. The characteristic time interval of 5-25 days between TeV flares is consistent with them being driven by Lense-Thirring precession., 10 pages, 11 figures, Astronomy and astrophysics pre-print. arXiv admin note: text overlap with arXiv:2101.10651
Published: 2021

35. FACT - Probing the Periodicity of Mrk 421 and Mrk 501

Author: Matteo Balbo, Dominik Elsaesser, Daniela Dorner, Axel Arbet-Engels, M. Bulinski, K. Sedlaczek, Adrian Biland, Amit Shukla, Aleksander Paravac, Roland Walter, Dorothee Hildebrand, Thomas Bretz, Andrii Neronov, Dominik Neise, Wolfgang Rhode, Elan von Willert, Sebastian Achim Mueller, Karl Mannheim, Vitalii Sliusar, Bernd Schleicher, Marc Klinger, Fabian Theissen, Laurits Tani, Michael Blank, Manuel Doerr, K. Bruegge, Marvin Beck, Dominik Baack, Roman Iotov, Maximilian Noethe, and Jens Buss
Subjects: Physics, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Light curve, Accretion (astrophysics), law.invention, Telescope, Crab Nebula, law, Blazar, Astrophysics::Galaxy Astrophysics, Fermi Gamma-ray Space Telescope
Abstract: Markarian 421 and Markarian 501 are Active Galactic Nuclei and two of the most prominent sources of very high energetic gamma rays. In contrast to the predominantly stable Crab Nebula, the two blazars have extremely variable gamma-ray fluxes. Those could be caused by erratic accretion flow instabilities, but also by processes leading to quasi periodic oscillations (QPOs). Recently, hints of such a QPO of Mrk 501 with a period of about 322 days have been observed with the Large Area Telescope on-board of the Fermi satellite at GeV energies featuring global and local significances of the signal above 99%. The First G-APD Cherenkov Telescope (FACT) has monitored a small sample of known TeV gamma-ray sources including Mrk 421 and Mrk 501 over the last seven years. Therefore, it is ideally suited for periodicity studies of Active Galactic Nuclei, as they require unbiased and continuous long-term observations. Based on measurements of the well-known gamma-ray flux originating from the Crab Nebula, corrections to the measured light curves are applied. In total, 2500~hours of data for each of the two blazars have been analysed using the Lomb-Scargle algorithm. The resulting periodogram of Mrk 501 shows a hint of QPO with a similar period as the one observed by Fermi/LAT., PoS: Proceedings of Science, 358, ISSN:1824-8039, Proceedings of 36th International Cosmic Ray Conference (ICRC 2019)
Published: 2019

36. Fractional Variability: a Tool to Study Blazar Variability

Author: Sergej Grischagin, Dominik Elsaesser, F. Schulz, Dorothee Hildebrand, Adrian Biland, M. Bulinski, Vitalii Sliusar, Aleksander Paravac, Thomas Bretz, Matteo Balbo, Bernd Schleicher, Lena Linhoff, Axel Arbet-Engels, Andrii Neronov, Dominik Neise, Roland Walter, Wolfgang Rhode, Elan von Willert, Sebastian Achim Mueller, K. Bruegge, Michael Blank, Manuel Doerr, K. Sedlaczek, Daniela Dorner, Amit Shukla, Karl Mannheim, Dominik Baack, Maximilian Noethe, Jens Buss, Balbo, Matteo, Dorner, Daniela, Neronov, Andrii, Sliusar, Vitalii, and Walter, Roland
Subjects: Complete data, Active galactic nucleus, lcsh:Astronomy, Electromagnetic spectrum, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics, Radiation, Blazar, 01 natural sciences, lcsh:QB1-991, 0103 physical sciences, Range (statistics), ddc:530, Variability, 010303 astronomy & astrophysics, Physics, Active galactic nuclei, 010308 nuclear & particles physics, Astronomy and Astrophysics, Light curve, Aktiver galaktischer Kern, Fractional variability, Blazars, Variabilität, ddc:520
Abstract: Active Galactic Nuclei emit radiation over the whole electromagnetic spectrum up to TeV energies. Blazars are one subtype with their jets pointing towards the observer. One of their typical features is extreme variability on timescales, from minutes to years. The fractional variability is an often used parameter for investigating the degree of variability of a light curve. Different detection methods and sensitivities of the instruments result in differently binned data and light curves with gaps. As they can influence the physics interpretation of the broadband variability, the effects of these differences on the fractional variability need to be studied. In this paper, we study the systematic effects of completeness in time coverage and the sampling rate. Using public data from instruments monitoring blazars in various energy ranges, we study the variability of the bright TeV blazars Mrk 421 and Mrk 501 over the electromagnetic spectrum, taking into account the systematic effects, and compare our findings with previous results. Especially in the TeV range, the fractional variability is higher than in previous studies, which can be explained by the much longer (seven years compared to few weeks) and more complete data sample., Galaxies, 7 (2)
Published: 2019

37. Resolving the origin of very-high-energy gamma-ray emission from the PeVatron candidate SNR G106.3+2.7 using MAGIC telescopes

Author: M. I. Martínez, Giacomo D'Amico, Manuel Artero, Christian Fruck, Manuel Delfino, Ulisses Barres de Almeida, Jarred Gershon Green, Jordi Delgado, Tomislav Terzić, Lluis Font, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ana Babić, Ruben Lopez-Coto, Lena Linhoff, Marcel Strzys, Kevin Schmidt, Irene Jiménez Martínez, Davide Depaoli, Sargis Gasparyan, Simone Mender, Javier Herrera, Jose Miguel Miranda, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Daniel Kerszberg, Juan Abel Barrio, Lorenzo Bellizzi, Luca Tosti, Wolfgang Rhode, Junko Kushida, Giovanni Busetto, Paolo Da Vela, Lovro Pavletić, Narek Sahakyan, Serena Loporchio, Takeshi Nakamori, Francesco Longo, Barbara De Lotto, Abelardo Moralejo, Manuela Mallamaci, Leonardo Di Venere, Valerio D'Elia, Alessandro De Angelis, David H. Green, Camilla Maggio, Marina Manganaro, Jürgen Besenrieder, Stefano Truzzi, G. Maneva, Carlos Delgado Mendez, Pablo Peñil, Francesco Giordano, Antonio Tutone, Adrian Biland, Alexander Hahn, L. Maraschi, Elina Lindfors, Wrijupan Bhattacharyya, Daniel Mazin, Elia Do Souto Espiñeira, Elena Moretti, Yuki Iwamura, Stefano Covino, Saša Mićanović, Thomas Schweizer, Stefano Menchiari, Daniela Dorner, Giovanni Ceribella, Gaia Vanzo, Marine Pihet, Konstancja Satalecka, Stefano Ansoldi, Marc Ribó, Michele Doro, Ivana Batković, Riccardo Paoletti, Martin Makariev, Chiara Righi, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Yating Chai, Oscar Blanch, Markus Gaug, Stefan Cikota, Maria-Isabel Bernardos, Michele Palatiello, Tomohiko Oka, Alice Donini, Petar Temnikov, Mosè Mariotti, Koji Noda, Pratik Majumdar, Elisa Bernardini, Marie Karjalainen, Yusuke Suda, Takashi Saito, D. Dominis Prester, Pawel Gliwny, Nicola Giglietto, Cosimo Nigro, Kyoshi Nishijima, Hidetoshi Kubo, Tomohiro Inada, Bernd Schleicher, Iva Šnidarić, Markus Garczarczyk, Martin Will, Vandad Fallah Ramazani, Simona Paiano, Josep M. Paredes, Jenni Jormanainen, Carlo Vigorito, Dominik Baack, Lara Nava, Alessandra Lamastra, Chaitanya Priyadarshi, Edgar Molina, Vincenzo Vitale, Antonio Stamerra, Yukiho Kobayashi, Jorge Otero-Santos, Fabrizio Tavecchio, Louis Antonelli, Josefa González, Bernardo Machado de Oliveira Fraga, Alicia Fattorini, Sofia Ventura, Eduardo Colombo, Victoria Moreno, Satoshi Fukami, Massimo Persic, Darko Zarić, Seiya Nozaki, Daniel Morcuende, Jose Luis Contreras, Carolin Wunderlich, Francesco Leone, Juan Cortina, Masahiro Teshima, Tihomir Surić, Saverio Lombardi, Hendrik Bökenkamp, Tjark Miener, David Paneque, Ciro Bigongiari, Jelena Strišković, Andrea Rugliancich, Ivica Puljak, Santiago Ubach, Karl Mannheim, Victor A. Acciari, Giacomo Bonnoli, Alicia López-Oramas, Dario Hrupec, Sidika Merve Colak, Monica Vazquez Acosta, P. G. Prada Moroni, Moritz Hütten, Roberto Carosi, Shunsuke Sakurai, Mitsunari Takahashi, Alessio Berti, Kazuma Ishio, Andrés Baquero, Ramon J. García López, John Hoang, Davide Miceli, Axel Arbet Engels, Elisa Prandini, Alessia Spolon, Léa Jouvin, Dominik Elsaesser, Razmik Mirzoyan, Juliane van Scherpenberg, Ashot Chilingarian, Damir Lelas, Vassil Verguilov, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Zeljka Bosnjak, Katsuaki Asano, Maria Victoria Fonseca, Francesco Dazzi, Ievgen Vovk, Nikola Godinovic, Matteo Cerruti, Yasushi Fukazawa, Julian Sitarek, Daniela Hadasch, and Yoshiki Ohtani
Subjects: Physics, Air shower, Pulsar, Astrophysics::High Energy Astrophysical Phenomena, Continuum (design consultancy), Gamma ray, Angular resolution, Astrophysics::Cosmology and Extragalactic Astrophysics, MAGIC (telescope), Astrophysics, Supernova remnant, Pulsar wind nebula, Astrophysics::Galaxy Astrophysics
Abstract: The supernova remnant (SNR) G106.3+2.7 associated with a 100 TeV gamma-ray source reported by HAWC, Tibet AS$\gamma$, and LHAASO Collaborations is one of the promising PeVatron candidates. Because the SNR contains an energetic pulsar wind nebula (PWN) dubbed Boomerang powered by the pulsar PSR J2229+6114, it is unclear whether the gamma-ray emission originates from the SNR or PWN complex and whether it is caused by hadronic or leptonic processes. We observed gamma rays above 200 GeV in the vicinity of the SNR G106.3+2.7 using the MAGIC telescopes for total $\sim120$ hours between May 2017 and August 2019 with an angular resolution of 0.07--0.10 degrees, achieving an unprecedented exposure for this object at these energies. An extended gamma-ray emission spatially correlated with the radio continuum emission at the head and tail of SNR G106.3+2.7 was detected using the MAGIC telescopes. We found a significant gamma-ray emission above 5.65 TeV only from the SNR tail region, while no significant emission in the same band is found at the SNR head region containing the Boomerang PWN. Therefore, the gamma rays above 10 TeV detected with the air shower experiments are, likely, mainly emitted from the SNR tail region. In this presentation, we discuss the morphology of the gamma-ray emission from this complex region and attempt self-consistent multi-wavelength modeling of the energy spectrum.

38. Monitoring the magnetar SGR 1935+2154 with the MAGIC telescopes

Author: Marcos López-Moya, Wlodek Bednarek, Stefano Covino, Federico Di Pierro, Pratik Majumdar, Ruben Lopez-Coto, Alessandra Lamastra, Vincenzo Vitale, Filippo Ambrosino, Irene Jiménez Martínez, Francesco Leone, Mark P. Snelders, Jose Miguel Miranda, Adrian Biland, Takeshi Nakamori, Martin Will, Francesco Longo, Jordi Delgado, Paolo Da Vela, Francesco Dazzi, Jorge Otero-Santos, Vandad Fallah Ramazani, David H. Green, Barbara De Lotto, Giacomo D'Amico, Josep M. Paredes, Antonio Stamerra, Roberto Carosi, Giovanni Ceribella, Franz Kirsten, John Hoang, Sidika Merve Colak, Abelardo Moralejo, Camilla Maggio, Daniela Dorner, Gaia Vanzo, Seiya Nozaki, Elia Do Souto Espiñeira, Kevin Schmidt, Monica Vazquez Acosta, Marina Manganaro, Daniel Kerszberg, Daniel Morcuende, Jose Luis Contreras, Davide Depaoli, Jarred Gershon Green, Tomohiko Oka, Serena Loporchio, Massimo Persic, Giacomo Bonnoli, D. Dominis Prester, Marc Ribó, Martin Makariev, L. Maraschi, Lorenzo Bellizzi, P. G. Prada Moroni, Hidetoshi Kubo, Juliane van Scherpenberg, Tomohiro Inada, Petar Temnikov, Juan Cortina, Elina Lindfors, Koji Noda, Francesco Coti Zelati, Juan Abel Barrio, Santiago Ubach, Narek Sahakyan, Shunsuke Sakurai, Kyoshi Nishijima, Elisa Bernardini, Ivica Puljak, Junko Kushida, Lovro Pavletić, Davide Miceli, Alessia Spolon, Léa Jouvin, Oscar Blanch, Stefano Menchiari, Bernd Schleicher, Jenni Jormanainen, Satoshi Fukami, Hendrik Bökenkamp, Omar S. Ould-Boukattine, Elena Moretti, Konstancja Satalecka, Leonardo Di Venere, Carlos Delgado Mendez, Edgar Molina, Lluis Font, Vassil Verguilov, Alice Borghese, Bernardo Machado de Oliveira Fraga, Dario Hrupec, Michele Doro, Katsuaki Asano, Alessandro Papitto, Daniel Mazin, Jürgen Besenrieder, Lena Linhoff, Ramon J. García López, Francesco Giordano, Javier Rico, Antonio Tutone, Marcel Strzys, Simone Mender, Thomas Schweizer, Tokonatsu Yamamoto, Sargis Gasparyan, Yating Chai, Ievgen Vovk, Vitaly Neustroev, Mitsunari Takahashi, Javier Herrera, Maria Victoria Fonseca, Masahiro Teshima, Stefano Ansoldi, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, Riccardo Paoletti, Markus Gaug, Luca Tosti, Michele Palatiello, Nikola Godinovic, Wolfgang Rhode, Benito Marcote, Giovanni Busetto, Victoria Moreno, Ryuji Takeishi, Ciro Bigongiari, Chiara Righi, Darko Zarić, Stefano Truzzi, D. M. Strom, Kari Nilsson, Wrijupan Bhattacharyya, Valerio D'Elia, Manuela Mallamaci, Julian Sitarek, Alice Donini, Jason W. T. Hessels, G. Maneva, Pablo Peñil, Alessandro De Angelis, Marie Karjalainen, Daniela Hadasch, Iva Šnidarić, Alexander Hahn, Saša Mićanović, Chaitanya Priyadarshi, Yoshiki Ohtani, Ivana Batković, Yusuke Suda, Marine Pihet, Matteo Cerruti, Manuel Delfino, Ulisses Barres de Almeida, Louis Antonelli, Lara Nava, Dominik Elsaesser, Razmik Mirzoyan, Mosè Mariotti, Damir Lelas, Lea Heckmann, Andrés Baquero, Francesco Gabriele Saturni, Tarek M. Hassan, Yasushi Fukazawa, Carolin Wunderlich, Ana Babić, Dorota Sobczyńska, Fabrizio Tavecchio, Zeljka Bosnjak, Eduardo Colombo, Carlo Vigorito, Tjark Miener, Victor A. Acciari, David Paneque, Jelena Strišković, Moritz Hütten, Saverio Lombardi, Andrea Rugliancich, Takashi Saito, Dominik Baack, Alessio Berti, Yukiho Kobayashi, Axel Arbet Engels, Cosimo Nigro, Sofia Ventura, Yuki Iwamura, Susumu Inoue, Tihomir Surić, Karl Mannheim, Christian Fruck, Alicia López-Oramas, Maria-Isabel Bernardos, Simona Paiano, Alicia Fattorini, M. I. Martínez, Manuel Artero, Markus Garczarczyk, Josefa González, Tomislav Terzić, Kazuma Ishio, Elisa Prandini, and Ashot Chilingarian
Subjects: Physics, Wavelength, Fast radio burst, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Context (language use), Astrophysics, MAGIC (telescope), Magnetar, Astrophysics::Galaxy Astrophysics, Cherenkov radiation, Optical telescope
Abstract: The Galactic magnetar SGR 1935+2154 was associated with a bright, millisecond-timescale fast radio burst (FRB) which occured in April 2020, during a flaring episode. This was the first time an FRB was unequivocally associated with a Galactic source, and the first FRB for which the nature of the emitting source was identified. Moreover, it was the first FRB with a counterpart at another wavelength correlated in time, an atypical, hard X-ray burst, which provides clear evidence for accompanying non-thermal processes. The MAGIC Telescopes are Imaging Air Cherenkov Telescopes (IACTs) sensitive to very-high-energy (VHE, E>100 GeV) gamma rays. Located at the center of the camera lies the MAGIC Central pixel, a single fully-modified photosensor-to- readout chain to measure millisecond-duration optical signals, displaying a maximum sensitivity at a wavelength of 350 nm. This allows MAGIC to operate simultaneously both as a VHE gamma- ray and a fast optical telescope. The MAGIC telescopes have monitored SGR 1935+2154 in a multiwavelength campaign involving X-ray, radio and optical facilities. In this contribution, we will show the results on the search for the VHE counterpart of the first SGR-FRB source in this multiwavelength context, as well as the search for fast optical bursts with the MAGIC Central Pixel.

39. Observation of a relatively low luminosity long duration GRB 201015A by the MAGIC telescopes

Author: Dominik Elsaesser, Razmik Mirzoyan, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Damir Lelas, Lea Heckmann, Francesco Gabriele Saturni, Alexander Hahn, Dorota Sobczyńska, Zeljka Bosnjak, Dario Hrupec, Mitsunari Takahashi, Luca Tosti, Manuel Delfino, Ulisses Barres de Almeida, Valerio D'Elia, G. Maneva, Ana Babić, Michele Palatiello, Marine Pihet, Mosè Mariotti, Kazuma Ishio, Ievgen Vovk, Matteo Cerruti, Jordi Delgado, Yusuke Suda, Adrian Biland, Abelardo Moralejo, Yasushi Fukazawa, D. Dominis Prester, Lena Linhoff, Elisa Prandini, Yuki Iwamura, Kevin Schmidt, Carlo Vigorito, Francesco Longo, Stefano Truzzi, Juliane van Scherpenberg, Ivica Puljak, Jenni Jormanainen, Alice Donini, Satoshi Fukami, Davide Miceli, Saverio Lombardi, Daniel Morcuende, Davide Depaoli, Jose Luis Contreras, Bernardo Machado de Oliveira Fraga, Ashot Chilingarian, Vandad Fallah Ramazani, Christian Fruck, Josep M. Paredes, Antonio Stamerra, Andrea Rugliancich, Juan Cortina, Iva Šnidarić, Ramon J. García López, L. Maraschi, Wrijupan Bhattacharyya, Pratik Majumdar, Elina Lindfors, Pablo Peñil, M. I. Martínez, Masahiro Teshima, Alessia Spolon, Léa Jouvin, Hendrik Bökenkamp, Leonardo Di Venere, Daniel Mazin, Daniela Dorner, Gaia Vanzo, Markus Garczarczyk, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Elia Do Souto Espiñeira, Chiara Righi, Giacomo Bonnoli, Takashi Saito, P. G. Prada Moroni, Bernd Schleicher, Edgar Molina, Martin Will, Saša Mićanović, Junko Kushida, Lovro Pavletić, Jorge Otero-Santos, Lara Nava, Marie Karjalainen, Dominik Baack, Ryuji Takeishi, Petar Temnikov, Koji Noda, Josefa González, D. M. Strom, Kari Nilsson, Ivana Batković, Manuela Mallamaci, Louis Antonelli, Yukiho Kobayashi, Elisa Bernardini, Chaitanya Priyadarshi, Alessandro De Angelis, Stefano Covino, Thomas Schweizer, Seiya Nozaki, Stefano Ansoldi, Riccardo Paoletti, Takeshi Nakamori, Vassil Verguilov, Martin Makariev, Oscar Blanch, Francesco Dazzi, Fabrizio Tavecchio, Markus Gaug, Barbara De Lotto, Manuel Artero, Carolin Wunderlich, Camilla Maggio, Eduardo Colombo, Tjark Miener, David Paneque, Giovanni Ceribella, Tomislav Terzić, Santiago Ubach, Juan Abel Barrio, Tomohiko Oka, Narek Sahakyan, Maria-Isabel Bernardos, Jelena Strišković, Kenta Terauchi, Ciro Bigongiari, Daniel Kerszberg, Kyoshi Nishijima, Marina Manganaro, Shunsuke Sakurai, Carlos Delgado Mendez, Victor A. Acciari, Elena Moretti, Julian Sitarek, Simona Paiano, Konstancja Satalecka, Alicia Fattorini, Michele Doro, Marc Ribó, Serena Loporchio, Moritz Hütten, Hidetoshi Kubo, Tomohiro Inada, Daniela Hadasch, Roberto Carosi, Yoshiki Ohtani, Andrés Baquero, Massimo Persic, Stefano Menchiari, Alessandra Lamastra, Vincenzo Vitale, Lluis Font, Francesco Leone, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, Jose Miguel Miranda, Paolo Da Vela, David H. Green, Marcel Strzys, Katsuaki Asano, Maria Victoria Fonseca, Sidika Merve Colak, Monica Vazquez Acosta, Simone Mender, Javier Herrera, Yating Chai, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, Nikola Godinovic, Victoria Moreno, Darko Zarić, John Hoang, Lorenzo Bellizzi, Giacomo D'Amico, Jarred Gershon Green, Cosimo Nigro, Sofia Ventura, Sargis Gasparyan, Alessio Berti, Wolfgang Rhode, Giovanni Busetto, Axel Arbet Engels, Tihomir Surić, Karl Mannheim, and Alicia López-Oramas
Subjects: Physics, education.field_of_study, High energy, Astrophysics::High Energy Astrophysical Phenomena, Population, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift, Luminosity, Supernova, MAGIC (telescope), Gamma-ray burst, education, Short duration
Abstract: Starting from the first announcement of unequivocal detection of very high energy (VHE) emission from a gamma-ray burst (GRB) by the MAGIC telescopes (GRB 190114C), four additional detections of VHE emission from GRBs by ground-based telescopes were reported. These observations have revealed a new, energetic component that has become an additional probe to explore GRB physics. In order to deepen our understanding of the origin of this new component, and in general of the origin of radiation from GRBs, further observations by VHE instruments are crucial. In this work we report fast follow-up observations by the MAGIC telescopes of GRB 201015A, a GRB detected by the Swift/BAT. As measured by BAT, the prompt emission lasted 9.8 +/- 3.5 seconds, suggesting that this GRB belongs to the class of long events. This was later confirmed by optical observations, which allowed to measure the redshift (𝑧 = 0.42) and found the associated type Ic-BL supernova. Having a prompt isotropic-equivalent energy of 𝐸iso ∼10^{50} erg, this GRB is a relatively low energy event as compared to the population of long GRBs. Observations with the MAGIC telescopes started about 30 seconds after the GRB onset and were performed under good observational conditions. The accurate analysis of the MAGIC data reveals a strong hint of detection and implies a significant energy release in the TeV range, smaller but comparable with that of the prompt emission in the keV-MeV band.

40. Recent results on LIV studies using MAGIC telescopes from the observation of GRB 190114C

Author: Giacomo D( extquotesingle)Amico, Acciari, Victor A., Stefano, Ansoldi, Lucio Angelo Antonelli, Axel Arbet Engels, Manuel, Artero, Katsuaki, Asano, Dominik, Baack, Ana, Babic, Andr('(e))s, Baquero, Ulisses Barres de Almeida, Juan Abel Barrio, Ivana, Batkovi('(c)), Josefa Becerra Gonzalez, Wlodek, Bednarek, Lorenzo, Bellizzi, Elisa, Bernardini, Maria-Isabel, Bernardos, Alessio, Berti, Jürgen, Besenrieder, Wrijupan, Bhattacharyya, Ciro, Bigongiari, Adrian, Biland, Oscar, Blanch, Hendrik, Bökenkamp, Giacomo, Bonnoli, Zeljka, Bosnjak, Giovanni, Busetto, Roberto, Carosi, Giovanni, Ceribella, Matteo, Cerruti, Yating, Chai, Ashot, Chilingarian, Stefan, Cikota, Sidika Merve Colak, Eduardo, Colombo, Jose Luis Contreras, Juan, Cortina, Stefano, Covino, Valerio D( extquotesingle)Elia, Paolo Da Vela, Francesco, Dazzi, Alessandro De Angelis, Barbara De Lotto, Manuel, Delfino, Jordi, Delgado, Carlos Delgado Mendez, Davide, Depaoli, Federico Di Pierro, Leonardo Di Venere, Elia Do Souto Espi(~(n))eira, Dijana Dominis Prester, Alice, Donini, Daniela, Dorner, Michele, Doro, Dominik, Elsaesser, Vandad Fallah Ramazani, Alicia, Fattorini, Maria Victoria Fonseca, Lluis, Font, Christian, Fruck, Satoshi, Fukami, Yasushi, Fukazawa, Garc('(i))a L('(o))pez, Ramon J., Markus, Garczarczyk, Sargis, Gasparyan, Markus, Gaug, Giglietto, Nicola, Francesco, Giordano, Pawel, Gliwny, Nikola, Godinovic, David, Green, Jarred Gershon Green, Daniela, Hadasch, Alexander, Hahn, Lea, Heckmann, Javier, Herrera, John, Hoang, Dario, Hrupec, Moritz, Hütten, Tomohiro, Inada, Kazuma, Ishio, Yuki, Iwamura, Irene Jim('(e))nez Mart('(i))nez, Jenni, Jormanainen, L('(e))a, Jouvin, Marie, Karjalainen, Daniel, Kerszberg, Yukiho, Kobayashi, Hidetoshi, Kubo, Junko, Kushida, Alessandra, Lamastra, Damir, Lelas, Francesco, Leone, Elina, Lindfors, Lena, Linhoff, Saverio, Lombardi, Francesco, Longo, Ruben, Lopez-Coto, Marcos, L('(o))pez-Moya, Alicia, L('(o))pez-Oramas, Loporchio, Serena, Bernardo Machado de Oliveira Fraga, Camilla, Maggio, Pratik, Majumdar, Martin, Makariev, Manuela, Mallamaci, Galina, Maneva, Marina, Manganaro, Karl, Mannheim, Laura, Maraschi, Mos(`(e)), Mariotti, Manel, Martinez, Daniel, Mazin, Stefano, Menchiari, Simone, Mender, Sa( (s))a Mi('(c))anovi('(c)), Davide, Miceli, Tjark, Miener, Jose Miguel Miranda, Razmik, Mirzoyan, Edgar, Molina, Abelardo, Moralejo, Daniel, Morcuende, Victoria, Moreno, Elena, Moretti, Takeshi, Nakamori, Lara, Nava, Vitaly, Neustroev, Cosimo, Nigro, Kari, Nilsson, Kyoshi, Nishijima, Koji, Noda, Seiya, Nozaki, Yoshiki, Ohtani, Tomohiko, Oka, Jorge, Otero-Santos, Simona, Paiano, Michele, Palatiello, David, Paneque, Riccardo, Paoletti, Paredes, Josep M., Lovro, Pavleti('(c)), Pablo, Pe(~(n))il, Massimo, Persic, Marine, Pihet, Pier Giorgio Prada Moroni, Elisa, Prandini, Chaitanya, Priyadarshi, Ivica, Puljak, Wolfgang, Rhode, Marc, Rib('(o)), Javier, Rico, Chiara, Righi, Andrea, Rugliancich, Narek, Sahakyan, Takayuki, Saito, Shunsuke, Sakurai, Konstancja, Satalecka, Francesco Gabriele Saturni, Bernd, Schleicher, Kevin, Schmidt, Thomas, Schweizer, Julian, Sitarek, Iva, ( (S))nidari('(c)), Dorota, Sobczy('(n))ska, Alessia, Spolon, Antonio, Stamerra, Jelena Stri( (s))kovi('(c)), Derek, Strom, Marcel, Strzys, Yusuke, Suda, Tihomir, Suri('(c)), Mitsunari, Takahashi, Ryuji, Takeishi, Fabrizio, Tavecchio, Petar, Temnikov, Tomislav, Terzic, Masahiro, Teshima, Luca, Tosti, Stefano, Truzzi, Antonio, Tutone, Santiago, Ubach, Juliane van Scherpenberg, Gaia, Vanzo, Monica VAZQUEZ ACOSTA, Sofia, Ventura, Vassil, Verguilov, Carlo Francesco Vigorito, Vincenzo, Vitale, Ievgen, Vovk, Martin, Will, Carolin, Wunderlich, Tokonatsu, Yamamoto, Darko, Zari('(c)), C('(e))dric, Perennes, and And
Subjects: Physics, Astronomy, MAGIC (telescope), Gamma-ray burst

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