Naslov
Observation of the Gamma-Ray Binary HESS J0632+057 with the H.E.S.S., MAGIC, and VERITAS Telescopes

Autori
Adams, C. B. ; Benbow, W. ; Brill, A. ; Buckley, J. H. ; Capasso, M. ; Chromey, A. J. ; Errando, M. ; Falcone, A. ; A Farrell, K. ; Feng, Q. ; Finley, J. P. ; M Foote, G. ; Fortson, L. ; Furniss, A. ; Gent, A. ; Gillanders, G. H. ; Giuri, C. ; Gueta, O. ; Hanna, D. ; Hassan, T. ; Hervet, O. ; Holder, J. ; Hona, B. ; Humensky, T. B. ; Jin, W. ; Kaaret, P. ; Kertzman, M. ; Kieda, D. ; K Kleiner, T. ; Krennrich, F. ; Kumar, S. ; Lang, M. J. ; Lundy, M. ; Maier, G. ; E McGrath, C. ; Moriarty, P. ; Mukherjee, R. ; Nieto, D. ; Nievas-Rosillo, M. ; O’Brien, S. ; Ong, R. A. ; Otte, A. N. ; Park, N. ; Patel, S. ; Pfrang, K. ; Pichel, A. ; Pohl, M. ; Prado, R. R. ; Quinn, J. ; Ragan, K. ; Reynolds, P. T. ; Ribeiro, D. ; Roache, E. ; Rovero, A. C. ; Ryan, J. L. ; Santander, M. ; Schlenstedt, S. ; Sembroski, G. H. ; Shang, R. ; Tak, D. ; Vassiliev, V. V. ; Weinstein, A. ; Williams, D. A. ; J Williamson, T. ; Acciari, V. A. ; Ansoldi, S. ; Antonelli, L. A. ; Arbet Engels, A. ; Artero, M. ; Asano, K. ; Baack, D. ; Babić, A. ; Baquero, A. ; Barres de Almeida, U. ; Barrio, J. A. ; Batković, I. ; Becerra González, J. ; Bednarek, W. ; Bellizzi, L. ; Bernardini, E. ; Bernardos, M. ; Berti, A. ; Besenrieder, J. ; Bhattacharyya, W. ; Bigongiari, C. ; Biland, A. ; Blanch, O. ; Bökenkamp, H. ; Bonnoli, G. ; Bošnjak, Ž. ; Busetto, G. ; Carosi, R. ; Ceribella, G. ; Cerruti, M. ; Chai, Y. ; Chilingarian, A. ; Cikota, S. ; Colak, S. M. ; Colombo, E. ; Contreras, J. L. ; Cortina, J. ; Covino, S. ; D’Amico, G. ; D’Elia, V. ; Da Vela, P. ; Dazzi, F. ; De Angelis, A. ; De Lotto, B. ; Delfino, M. ; Delgado, J. ; Delgado Mendez, C. ; Depaoli, D. ; Di Pierro, F. ; Di Venere, L. ; Do Souto Espiñeira, E. ; Dominis Prester, D. ; Donini, A. ; Dorner, D. ; Doro, M. ; Elsaesser, D. ; Fallah Ramazani, V. ; Fattorini, A. ; Fonseca, M. V. ; Font, L. ; Fruck, C. ; Fukami, S. ; Fukazawa, Y. ; García López, R. J. ; Garczarczyk, M. ; Gasparyan, S. ; Gaug, M. ; Giglietto, N. ; Giordano, F. ; Gliwny, P. ; Godinović, N. ; Green, J. G. ; Green, D. ; Hadasch, D. ; Hahn, A. ; Heckmann, L. ; Herrera, J. ; Hoang, J. ; Hrupec, D. ; Hütten, M. ; Inada, T. ; Ishio, K. ; Iwamura, Y. ; Jiménez Martínez, I. ; Jormanainen, J. ; Jouvin, L. ; Karjalainen, M. ; Kerszberg, D. ; Kobayashi, Y. ; Kubo, H. ; Kushida, J. ; Lamastra, A. ; Lelas, D. ; Leone, F. ; Lindfors, E. ; Linhoff, L. ; Lombardi, S. ; Longo, F. ; López- Coto, R. ; López-Moya, M. ; López-Oramas, A. ; Loporchio, S. ; Machado de Oliveira Fraga, B. ; Maggio, C. ; Majumdar, P. ; Makariev, M. ; Mallamaci, M. ; Maneva, G. ; Manganaro, M. ; Mannheim, K. ; Maraschi, L. ; Mariotti, M. ; Martínez, M. ; Mazin, D. ; Menchiari, S. ; Mender, S. ; Mićanović, S. ; Miceli, D. ; Miener, T. ; Miranda, J. M. ; Mirzoyan, R. ; Molina, E. ; Moralejo, A. ; Morcuende, D. ; Moreno, V. ; Moretti, E. ; Nakamori, T. ; Nava, L. ; Neustroev, V. ; Nigro, C. ; Nilsson, K. ; Nishijima, K. ; Noda, K. ; Nozaki, S. ; Ohtani, Y. ; Oka, T. ; Otero-Santos, J. ; Paiano, S. ; Palatiello, M. ; Paneque, D. ; Paoletti, R. ; Paredes, J. M. ; Pavletić, L. ; Peñil, P. ; Persic, M. ; Pihet, M. ; Prada Moroni, P. G. ; Prandini, E. ; Priyadarshi, C. ; Puljak, I. ; Rhode, W. ; Ribó, M. ; Rico, J. ; Righi, C. ; Rugliancich, A. ; Saha, L. ; Sahakyan, N. ; Saito, T. ; Sakurai, S. ; Satalecka, K. ; Saturni, F. G. ; Schleicher, B. ; Schmidt, K. ; Schweizer, T. ; Sitarek, J. ; Šnidarić, I. ; Sobczynska, D. ; Spolon, A. ; Stamerra, A. ; Strišković, J. ; Strom, D. ; Strzys, M. ; Suda, Y. ; Surić, T. ; Takahashi, M. ; Takeishi, R. ; Tavecchio, F. ; Temnikov, P. ; Terzić, T. ; Teshima, M. ; Tosti, L. ; Truzzi, S. ; Tutone, A. ; Ubach, S. ; van Scherpenberg, J. ; Vanzo, G. ; Vazquez Acosta, M. ; Ventura, S. ; Verguilov, V. ; Vigorito, C. F. ; Vitale, V. ; Vovk, I. ; Will, M. ; Wunderlich, C. ; Yamamoto, T. ; Zarić, D. et al.,

Kolaboracija
MAGIC Collaboration

Izvornik
The Astrophysical Journal (0004-637X) 923 (2021), 2; 241-271

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
gamma-ray binaries — binaries: general — gamma rays:stars — Xrays: binaries — stars: individual (HESSJ0632+057)

Sažetak
The results of gamma-ray observations of the binary system HESS J0632+057 collected during 450 hours over 15 years, 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 VHE 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 of 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 the time scale 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 can not find any correlation of optical Hα parameters with X-ray or gamma-ray energy fluxes 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 time scales. 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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