Recent observations of PKS 2155-304 with MAGIC and LST-1 in a multi-wavelength context
- Autori: Martinez, I.J.; Santos, A.C.; Hassan, T.; Acciari, V.; Burelli, I.; Cortina, J.; Della Volpe, D.; Diaz Ginzo, C.; Garcia-Lago, F.F.; Jorge, I.; Martinez, G.; Mirzoyan, R.; Polo, M.; Raiola, A.; Rodriguez-Vazquez, J.J.; Saha, P.; Schweizer, T.; Stanic, L.; Abe, K.; Abe, S.; Abhir, J.; Abhishek, A.; Acciari, V.A.; Aguasca-Cabot, A.; Agudo, I.; Aniello, T.; Ansoldi, S.; Antonelli, L.A.; Arbet Engels, A.; Arcaro, C.; Arnesen, T.T.H.; Babic, A.; Bakshi, C.; Barres De Almeida, U.; Barrio, J.A.; Barrios-Jimenez, L.; Batkovic, I.; Baxter, J.; Becerra Gonzalez, J.; Bednarek, W.; Bernardini, E.; Bernete, J.; Berti, A.; Besenrieder, J.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Bosnjak, Z.; Bronzini, E.; Burelli, I.; Campoy-Ordaz, A.; Carosi, A.; Carosi, R.; Carretero-Castrillo, M.; Zhang, W.; Cerasole, D.; Ceribella, G.; Cervino, A.; Chai, Y.; Chilingarian, A.; Cifuentes, A.; Colombo, E.; Contreras, J.L.; Cortina, J.; Covino, S.; D'Amico, G.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Lotto, B.; De Menezes, R.; Delfino, M.; Delgado, J.; Delgado Mendez, C.; Di Pierro, F.; Di Tria, R.; Di Venere, L.; Dinesh, A.; Dominis Prester, D.; Donini, A.; Dorner, D.; Doro, M.; Eisenberger, L.; Elsaesser, D.; Yoshikoshi, T.; Farina, L.; Foffano, L.; Font, L.; Frose, S.; Fukazawa, Y.; Garcia Lopez, R.J.; Garcia Soto, S.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giesbrecht Paiva, J.G.; Giglietto, N.; Giordano, F.; Yoshida, T.; Godinovic, N.; Gradetzke, T.; Grau, R.; Green, D.; Green, J.G.; Gunther, P.; Hadasch, D.; Hahn, A.; Harutyunyan, G.; Hashizume, M.; Hassan, T.; Heckmann, L.; Herrera Llorente, J.; Hrupec, D.; Imazawa, R.; Israyelyan, D.; Itokawa, T.; Jahanvi, J.; Jimenez Martinez, I.; Jimenez Quiles, J.; Jormanainen, J.; Kankkunen, S.; Kayanoki, T.; Khachatryan, M.; Kluge, G.W.; Konrad, J.; Kouch, P.M.; Koziol, G.; Kubo, H.; Kushida, J.; Lainez, M.; Lamastra, A.; Lelas, D.; Lindfors, E.; Lombardi, S.; Longo, F.; Lopez-Coto, R.; Lopez-Moya, M.; Lopez-Oramas, A.; Loporchio, S.; Lorini, A.; Lulic, L.; Lyard, E.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Maneva, G.; Manganaro, M.; Mangano, S.; Mannheim, K.; Marchesi, S.; Mariotti, M.; Martinez, M.; Marusevec, P.; Mas-Aguilar, A.; Mazin, D.; Yeung, P.K.H.; Yao, Y.; Menon, S.; Miceli, D.; Miranda, J.M.; Mirzoyan, R.; Molero Gonzalez, M.; Molina, E.; Mondal, H.A.; Moralejo, A.; Nakamori, T.; Nanci, C.; Nava, L.; Negro, A.; Neustroev, V.; Nickel, L.; Nievas Rosillo, M.; Nigro, C.; Nikolic, L.; Nilsson, K.; Nozaki, S.; Okumura, A.; Otero-Santos, J.; Paiano, S.; Paneque, D.; Paoletti, R.; Paredes, J.M.; Pavletic, L.; Peresano, M.; Persic, M.; Yamazaki, R.; Pirola, G.; Podobnik, F.; Prada Moroni, P.G.; Prandini, E.; Rhode, W.; Ribo, M.; Rico, J.; Righi, C.; Roy, A.; Ruina, A.; Sahakyan, N.; Saturni, F.G.; Schmitz, K.; Schmuckermaier, F.; Schubert, J.L.; Schweizer, T.; Sciaccaluga, A.; Silvestri, G.; Simongini, A.; Yamamoto, T.; Sliusar, V.; Wojtowicz, J.; Stamerra, A.; Striskovic, J.; Strom, D.; Strzys, M.; Suda, Y.; Tajima, H.; Takahashi, M.; Takeishi, R.; Temnikov, P.; Terauchi, K.; Terzic, T.; Teshima, M.; Tutone, A.; Ubach, S.; Van Scherpenberg, J.; Vazquez Acosta, M.; Ventura, S.; Verna, G.; Viale, I.; Vigliano, A.; Vigorito, C.F.; Visentin, E.; Vitale, V.; Vovk, I.; Walter, R.; Wersig, F.; Will, M.; Yamamoto, T.; Yeung, P.K.H.; Abe, K.; Abe, S.; Abhishek, A.; Acero, F.; Aguasca-Cabot, A.; Agud, I.; Alispach, C.; Ambrosino, D.; Ambrosino, F.; Antonelli, L.A.; Aramo, C.; Arbet-Engels, A.; Arcaro, C.; Arnesen, T.T.H.; Asano, K.; Aubert, P.; Baktash, A.; Balbo, M.; Bamba, A.; Baquero Larriva, A.; Barbosa Martins, V.; Barres De Almeida, U.; Barrio, J.A.; Barrios Jimenez, L.; Batkovic, I.; Baxter, J.; Becerra Gonzalez, J.; Bernardini, E.; Bernete, J.; Berti, A.; Bigongiari, C.; Bissaldi, E.; Blanch, O.; Bonnoli, G.; Bordas, P.; Borkowski, G.; Briscioli, A.; Brunelli, G.; Buces, J.; Bulgarelli, A.; Bunse, M.; Burelli, I.; Burmistrov, L.; Cardillo, M.; Caroff, S.; Carosi, A.; Carraro, R.; Carrasc
- Anno di pubblicazione: 2025
- Tipologia: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/700195
Abstract
PKS 2155-304 is a well-known high-frequency peaked BL Lac (HBL) at redshift z=0.116, which has been extensively studied across the electromagnetic spectrum due to its rapid and large-amplitude variability. Several violent outbursts in X-rays and γ-rays have been observed in the past, with intra-night variability in very-high-energy γ-rays (VHE; E > 100 GeV) detected down to the minute timescale. The alternation of quiescent and enhanced states, observed with a tentative quasi-periodicity of 1.74 ± 0.13 years in high-energy (HE; 100 MeV < E < 100 GeV) γ-rays, makes this source a key target also for ground-based γ-ray instruments and in particular for the Imaging Atmospheric Cherenkov Telescopes. Its brightness, proximity, and well-determined redshift make this γ-ray source a prime target for fundamental physics studies, including tests of Lorentz Invariance Violation (LIV), searches for axion-like particles (ALPs), and constraints on the distribution of the extragalactic background light (EBL). In the last two years, PKS 2155-304 has been independently monitored by the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes and the first Large-Sized Telescope (LST-1) of the Cherenkov Telescope Array Observatory (CTAO) located at the Roque de Los Muchachos Observatory (La Palma, Spain). The observations were carried out at large zenith angles (LZA; ZA > 55°), and the VHE data have been complemented with simultaneous observations in HE γ-rays (Fermi-LAT), X-rays (Swift-XRT) and optical wavelengths (ASAS-SN).