Year: 2025
Type: conference-paper
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).
DOI: 10.22323/1.501.0783
Authors: Lisa Nikolić, Gaia Verna, Marina Manganaro, Giacomo Bonnoli, Ivan Agudo, Giuseppe Silvestri, Davide Cerasole, Francesco Schiavone, Franjo Podobnik, Jorge Otero-Santos
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, Sveučilište u Zagrebu, Comunidad de Madrid, Ministerio de Ciencia, Innovación y Universidades, Centres de Recerca de Catalunya, European Commission, Deutsche Forschungsgemeinschaft, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Fundação de Amparo à Pesquisa do Estado de São Paulo, Ministerstvo Školství, Mládeže a Tělovýchovy, Bundesministerium für Bildung und Forschung, Generalitat de Catalunya, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Max-Planck-Gesellschaft, Narodowe Centrum Nauki, Hrvatska Zaklada za Znanost, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Fundação Araucária, Centre National de la Recherche Scientifique, Ministerio de Ciencia e Innovación, Istituto Nazionale di Astrofisica, Sveučilište Josipa Jurja Strossmayera u Osijeku, Junta de Andalucía, Ministério da Ciência, Tecnologia, Inovações e Comunicações, Istituto Nazionale di Fisica Nucleare, Instituto de Astrofísica de Canarias, Japan Society for the Promotion of Science, Consejo Superior de Investigaciones Científicas, Staatssekretariat für Bildung, Forschung und Innovation, European Regional Development Fund, Agencia Estatal de Investigación, Institut National de Physique Nucléaire et de Physique des Particules, Institute for Cosmic Ray Research, University of Tokyo
Awards: G1059663884, G1089506725, G1105844351, G1162841413, G1175115578, G120905174, G1272927172, G1293671712, G1301723534, G1323383031, G1325701057, G1381791653, G1449231074, G1485410139, G176604203, G1767413778, G1855990336, G1888088267, G1953887145, G195395952, G196419191, G2030784793, G2064873908, G210041235, G2209488408, G2233160401, G2262748287, G2309174360, G2313451655, G2486595072, G2492639332, G2507835933, G2554159582, G2601397997, Cherenkov Telescope Array - participation of the Czech Republic, G265847165, G2660406951, G2753747443, G278595929, G279363373, G282847690, G291036901, G2988934680, Fermi gases in complex lattice structures: from Dirac points to Spin liquids, G3005324705, G3006871385, G300979063, G302750986, G304813024, G3197651753, G320127510, G3207356259, G3384621141, G3413881215, G34346518, G3439265645, G3480869486, G348919436, G3490171961, G357246561, G3622461675, G363809202, G3681454997, G3690828678, G3715634343, G3735356012, G373897614, G3780874795, G3817602061, G3869365384, G393177772, G3978510197, G4042783231, G4087634877, G4104599821, G410571670, G419854590, G4238322289, G425668148, G430777504, G4317403835, G432284461, G434337789, 癌細胞の遊離, 定着機構と転移抑制に関する研究, G451917667, The Preparatory Phase for the Cherenkov Telescope Array
(CTA-PP), G463062595, G4760961572, G483893733, 原子炉による悪性皮膚腫瘍の選択的治療, G488842982, G491712853, G496129201, INtelligent Fast Interconnected and Efficient Devices for Frontier Exploitation in Research and Industry, G5011157824, G5080475149, G5243814431, Very-high-energy Gamma Ray Astronomy in the Multi-messenger Era, G529962013, G531036588, G5421974903, G545007060, G5539323971, G5555131222, G5600317921, G5641063287, G5662822759, G5702163051, G5845768719, G5894067328, G5915139351, G5916014575, G5967599077, Cherenkov Telescope Array: Infrastructure Development and Start of Implementation, G6033112984, G617610489, G624877701, G6309293051, G6393254597, G6438247056, G6513613686, European Science Cluster of Astronomy & Particle physics ESFRI research infrastructures, G6649312515, G6656126374, G6791753710, G69051668, G6927395467, G6941735741, G696452451, G702601109, G7084143925, G7191602444, G7363506711, G7392162325, G7425137858, 古代説話における諸寺縁起の研究, G7805626310, G7863371703, G8017551882, G8079053745, G8347645112, G8373891351, G8497050386, G8546142835, G8639560392, G8684520763, G8752631986, G8752642921, G8792602865, G880499800, G8807499512, G8920101981, G8920660035, G8927985011, G929308097, G99296377
OpenAlex ID: W4414530816
FWCI:
Cites:
Cited by:
Related to: