Adams_2021_ApJ_923_241.pdf (4.6 MB)
Observation of the Gamma-Ray Binary HESS J0632+057 with the HESS, MAGIC, and VERITAS Telescopes
journal contributionposted on 2022-05-20, 08:54 authored by CB Adams, W Benbow, A Brill, JH Buckley, M Capasso, AJ Chromey, M Errando, A Falcone, KA Farrell, Q Feng, JP Finley, GM Foote, L Fortson, A Furniss, A Gent, GH Gillanders, C Giuri, O Gueta, D Hanna, T Hassan, O Hervet, J Holder, B Hona, TB Humensky, W Jin, P Kaaret, M Kertzman, D Kieda, TK Kleiner, F Krennrich, S Kumar, MJ Lang, M Lundy, G Maier, CE McGrath, P Moriarty, R Mukherjee, D Nieto, M Nievas-Rosillo, S O'Brien, RA Ong, AN Otte, N Park, S Patel, K Pfrang, A Pichel, M Pohl, RR Prado, J Quinn, K Ragan, PT Reynolds, D Ribeiro, E Roache, AC Rovero, JL Ryan, M Santander, S Schlenstedt, GH Sembroski, R Shang, D Tak, VV Vassiliev, A Weinstein, DA Williams, TJ Williamson, VA Acciari, S Ansoldi, LA Antonelli, A Arbet Engels, M Artero, K Asano, D Baack, A Babic, A Baquero, U Barres de Almeida, JA Barrio, I Batkovic, J Becerra Gonzalez, W Bednarek, L Bellizzi, E Bernardini, M Bernardos, A Berti, J Besenrieder, W Bhattacharyya, C Bigongiari, A Biland, O Blanch, H Boekenkamp, G Bonnoli, G Busetto, Z Bosnjak, R Carosi, G Ceribella, M Cerruti, Y Chai, A Chilingarian, S Cikota, SM Colak, E Colombo, JL Contreras, J Cortina, S Covino, G D'Amico, V D'Elia, P Da Vela, F Dazzi, A De Angelis, B De Lotto, M Delfino, J Delgado, C Delgado Mendez, D Depaoli, F Di Pierro, L Di Venere, E Do Souto Espineira, D Dominis Prester, A Donini, D Dorner, M Doro, D Elsaesser, V Fallah Ramazani, A Fattorini, M Fonseca, L Font, C Fruck, S Fukami, Y Fukazawa, RJ Garcia Lopez, M Garczarczyk, S Gasparyan, M Gaug, N Giglietto, F Giordano, P Gliwny, N Godinovic, JG Green, D Green, D Hadasch, A Hahn, L Heckmann, J Herrera, J Hoang, D Hrupec, M Huetten, T Inada, K Ishio, Y Iwamura, I Jimenez Martinez, J Jormanainen, L Jouvin, M Karjalainen, D Kerszberg, Y Kobayashi, H Kubo, J Kushida, A Lamastra, D Lelas, F Leone, E Lindfors, L Linhoff, S Lombardi, F Longo, R Lopez-Coto, M Lopez-Moya, A Lopez-Oramas, S Loporchio, B Machado de Oliveira Fraga, C Maggio, P Majumdar, M Makariev, M Mallamaci, G Maneva, M Manganaro, K Mannheim, L Maraschi, M Mariotti, M Martinez, D Mazin, S Menchiari, S Mender, S Micanovic, D Miceli, T Miener, JM Miranda, R Mirzoyan, E Molina, A Moralejo, D Morcuende, V Moreno, E Moretti, T Nakamori, L Nava, V Neustroev, C Nigro, K Nilsson, K Nishijima, K Noda, S Nozaki, Y Ohtani, T Oka, J Otero-Santos, S Paiano, M Palatiello, D Paneque, R Paoletti, JM Paredes, L Pavletic, P Penil, M Persic, M Pihet, PG Prada Moroni, E Prandini, C Priyadarshi, I Puljak, W Rhode, M Ribo, J Rico, C Righi, A Rugliancich, L Saha, N Sahakyan, T Saito, S Sakurai, K Satalecka, FG Saturni, B Schleicher, K Schmidt, T Schweizer, J Sitarek, D Sobczynska, A Spolon, A Stamerra, J Striskovic, D Strom, M Strzys, Y Suda, T Suric, M Takahashi, R Takeishi, F Tavecchio, P Temnikov, T Terzic, M Teshima, L Tosti, S Truzzi, A Tutone, S Ubach, J van Scherpenberg, G Vanzo, M Vazquez Acosta, S Ventura, V Verguilov, CF Vigorito, V Vitale, I Vovk, M Will, C Wunderlich, T Yamamoto, D Zaric, H Abdalla, F Aharonian, F Ait Benkhali, EO Anguner, C Arcaro, H Ashkar, M Backes, V Barbosa Martins, M Barnard, R Batzofin, Y Becherini, D Berge, K Bernlohr, B Bi, M Bottcher, C Boisson, J Bolmont, M de Bony de Lavergne, M Breuhaus, R Brose, F Brun, T Bulik, S Caroff, S Casanova, T Chand, A Chen, G Cotter, J Damascenev Mbarubucyeye, J Devin, A Djannati-Atai, K Egberts, J-P Ernenwein, S Fegan, A Fiasson, G Fichet de Clairfontaine, G Fontaine, M Fussling, S Funk, S Gabici, G Giavitto, D Glawion, JF Glicenstein, M-H Grondin, JA Hinton, W Hofmann, TL Holch, M Holler, D Horns, Zhiqiu Huang, M Jamrozy, F Jankowsky, V Joshi, I Jung-Richardt, E Kasai, K Katarzynski, B Khelifi, Nu Komin, K Kosack, D Kostunin, S Le Stum, A Lemiere, J-P Lenain, F Leuschner, C Levy, T Lohse, A Luashvili, I Lypova, J Mackey, J Majumdar, D Malyshev, V Marandon, P Marchegiani, A Marcowith, G Marti-Devesa, R Marx, G Maurin, PJ Meintjes, A Mitchell, R Moderski, L Mohrmann, A Montanari, E Moulin, J Muller, T Murach, M de Naurois, A Nayerhoda, J Niemiec, A Priyana Noel, P O'Brien, S Ohm, L Olivera-Nieto, E de Ona Wilhelmi, M Ostrowski, S Panny, M Panter, RD Parsons, G Peron, V Poireau, DA Prokhorov, H Prokoph, G Puehlhofer, M Punch, A Quirrenbach, P Reichherzer, A Reimer, O Reimer, M Renaud, F Rieger, C Romoli, G Rowell, B Rudak, H Rueda Ricarte, E Ruiz-Velasco, V Sahakian, S Sailer, H Salzmann, DA Sanchez, A Santangelo, M Sasaki, HM Schutte, U Schwanke, F Schussler, M Senniappan, JNS Shapopi, R Simoni, H Sol, A Specovius, S Spencer, R Steenkamp, S Steinmassl, L Sun, T Takahashi, T Tanaka, R Terrier, N Tsuji, Y Uchiyama, C van Eldik, B van Soelen, J Veh, C Venter, J Vink, SJ Wagner, R White, A Wierzcholska, Yu Wun Wong, M Zacharias, D Zargaryan, AA Zdziarski, A Zech, SJ Zhu, S Zouari, N Zywucka, Y Moritani, DF Torres
The results of gamma-ray observations of the binary system HESS J0632 + 057 collected during 450 hr over 15 yr, between 2004 and 2019, are presented. Data taken with the atmospheric Cherenkov telescopes H.E.S.S., MAGIC, and VERITAS at energies above 350 GeV were used together with observations at X-ray energies obtained with Swift-XRT, Chandra, XMM-Newton, NuSTAR, and Suzaku. Some of these observations were accompanied by measurements of the Hα emission line. A significant detection of the modulation of the very high-energy gamma-ray fluxes with a period of 316.7 4.4 days is reported, consistent with the period of 317.3 0.7 days obtained with a refined analysis of X-ray data. The analysis of data from four orbital cycles with dense observational coverage reveals short-timescale variability, with flux-decay timescales of less than 20 days at very high energies. Flux variations observed over a timescale of several years indicate orbit-to-orbit variability. The analysis confirms the previously reported correlation of X-ray and gamma-ray emission from the system at very high significance, but cannot find any correlation of optical Hα parameters with fluxes at X-ray or gamma-ray energies in simultaneous observations. The key finding is that the emission of HESS J0632 + 057 in the X-ray and gamma-ray energy bands is highly variable on different timescales. The ratio of gamma-ray to X-ray flux shows the equality or even dominance of the gamma-ray energy range. This wealth of new data is interpreted taking into account the insufficient knowledge of the ephemeris of the system, and discussed in the context of results reported on other gamma-ray binary systems.
The support of the Namibian authorities and of the University of Namibia in facilitating the construction and operation of H.E.S.S. is gratefully acknowledged, as is the support by the German Ministry for Education and Research (BMBF), the Max Planck Society, the German Research Foundation (DFG), the Helmholtz Association, the Alexander von Humboldt Foundation, the French Ministry of Higher Education, Research and Innovation, the Centre National de la Recherche Scientifique (CNRS/IN2P3 and CNRS/INSU), the Commissariat à l'énergie atomique et aux énergies alternatives (CEA), the U.K. Science and Technology Facilities Council (STFC), the Knut and Alice Wallenberg Foundation, the National Science Centre, Poland grant no. 2016/22/M/ST9/00382, the South African Department of Science and Technology and National Research Foundation, the University of Namibia, the National Commission on Research, Science & Technology of Namibia (NCRST), the Austrian Federal Ministry of Education, Science and Research and the Austrian Science Fund (FWF), the Australian Research Council (ARC), the Japan Society for the Promotion of Science, and the University of Amsterdam. We appreciate the excellent work of the technical support staff in Berlin, Zeuthen, Heidelberg, Palaiseau, Paris, Saclay, Tübingen, and Namibia in the construction and operation of the equipment. This work benefited from services provided by the H.E.S.S. Virtual Organisation, supported by the national resource providers of the EGI Federation. The MAGIC collaboration would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF, MPG and HGF; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish Ministerio de Ciencia e Innovación (MICINN) (PID2019-104114RB-C31, PID2019-104114RB-C32, PID2019-104114RB-C33, PID2019-105510GB-C31,PID2019-107847RB-C41, PID2019-1
CitationAdams, C. B., et al. "Observation of the Gamma-Ray Binary HESS J0632+ 057 with the HESS, MAGIC, and VERITAS Telescopes." The Astrophysical Journal 923.2 (2021): 241.
Author affiliationDepartment of Physics and Astronomy
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