التفاصيل البيبلوغرافية
| العنوان: |
Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and gamma-ray activity in 2015–2016 |
| المؤلفون: |
Acciari, V. A. (V. A.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Asano, K. (K.), Babic, A. (A.), Banerjee, B. (B.), Baquero, A. (A.), de Almeida, U. B. (U. Barres), Barrio, J. A. (J. A.), Becerra Gonzalez, J. (J.), Bednarek, W. (W.), Bellizzi, L. (L.), Bernardini, E. (E.), Bernardos, M. (M.), Berti, A. (A.), Besenrieder, J. (J.), Bhattacharyya, W. (W.), Bigongiari, C. (C.), Blanch, O. (O.), Bonnoli, G. (G.), Bosnjak, Z. (Z.), Busetto, G. (G.), Carosi, R. (R.), Ceribella, G. (G.), Cerruti, M. (M.), Chai, Y. (Y.), Chilingarian, A. (A.), Cikota, S. (S.), Colak, S. M. (S. M.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), D'Amico, G. (G.), D'Elia, V. (V), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Delgado Mendez, C. (C.), Depaoli, D. (D.), Di Girolamo, T. (T.), Di Pierro, F. (F.), Di Venere, L. (L.), Espi Neira, E. D. (E. Do Souto), Prester, D. D. (D. Dominis), Donini, A. (A.), Doro, M. (M.), Ramazani, V. F. (V. Fallah), Fattorini, A. (A.), Ferrara, G. (G.), Foffano, L. (L.), Fonseca, M. V. (M., V), Font, L. (L.), Fruck, C. (C.), Fukami, S. (S.), Garcia Lopez, R. J. (R. J.), Garczarczyk, M. (M.), Gasparyan, S. (S.), Gaug, M. (M.), Giglietto, N. (N.), Giordano, F. (F.), Gliwny, P. (P.), Green, J. G. (J. G.), Green, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Heckmann, L. (L.), Herrera, J. (J.), Hoang, J. (J.), Hrupec, D. (D.), Huetten, M. (M.), Inada, T. (T.), Inoue, S. (S.), Ishio, K. (K.), Iwamura, Y. (Y.), Jormanainen, J. (J.), Jouvin, L. (L.), Kajiwara, Y. (Y.), Karjalainen, M. (M.), Kerszberg, D. (D.), Kobayashi, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Lamastra, A. (A.), Lelas, D. (D.), Leone, F. (F.), Lindfors, E. (E.), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Lopez-Coto, R. (R.), Lopez-Oramas, A. (A.), Loporchio, S. (S.), de Oliveira Fraga, B. M. (B. Machado), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Mallamaci, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Mazin, D. (D.), Mender, S. (S.), Micanovic, S. (S.), Miceli, D. (D.), Miener, T. (T.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Molina, E. (E.), Moralejo, A. (A.), Morcuende, D. (D.), Moreno, V. (V), Moretti, E. (E.), Munar-Adrover, P. (P.), Neustroev, V. (V), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nozaki, S. (S.), Ohtani, Y. (Y.), Oka, T. (T.), Otero-Santos, J. (J.), Palatiello, M. (M.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pavletic, L. (L.), Penil, P. (P.), Perennes, C. (C.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), Prandini, E. (E.), Priyadarshi, C. (C.), Puljak, I. (I), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saha, L. (L.), Sahakyan, N. (N.), Saito, T. (T.), Sakurai, S. (S.), Satalecka, K. (K.), Schleicher, B. (B.), Schmidt, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I), Sobczynska, D. (D.), Spolon, A. (A.), Stamerra, A. (A.), Strom, D. (D.), Strzys, M. (M.), Suda, Y. (Y.), Suric, T. (T.), Takahashi, M. (M.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Tosti, L. (L.), Truzzi, S. (S.), van Scherpenberg, J. (J.), Vanzo, G. (G.), Vazquez Acosta, M. (M.), Ventura, S. (S.), Verguilov, V. (V.), Vigorito, C. F. (C. F.), Vitale, V. (V.), Vovk, I. (I), Will, M. (M.), Zaric, D. (D.), Arbet-Engels, A. (A.), Baack, D. (D.), Balbo, M. (M.), Beck, M. (M.), Biederbeck, N. (N.), Biland, A. (A.), Bretz, T. (T.), Bruegge, K. (K.), Buss, J. (J.), Dorner, D. (D.), Elsaesser, D. (D.), Hildebrand, D. (D.), Iotov, R. (R.), Klinger, M. (M.), Mannheim, K. (K.), Neise, D. (D.), Neronov, A. (A.), Noethe, M. (M.), Paravac, A. (A.), Sliusar, V. (V), Theissen, F. (F.), Walter, R. (R.), Valverde, J. (J.), Horan, D. (D.), Giroletti, M. (M.), Perri, M. (M.), Verrecchia, F. (F.), Leto, C. (C.), Sadun, A. C. (A. C.), Moody, J. W. (J. W.), Joner, M. (M.), Marscher, A. P. (A. P.), Jorstad, S. G. (S. G.), Lahteenmaki, A. (A.), Tornikoski, M. (M.), Ramakrishnan, V. (V), Jarvela, E. (E.), Vera, R. J. (R. J. C.), Righini, S. (S.), Lien, A. Y. (A. Y.) |
| بيانات النشر: |
Oxford University Press |
| سنة النشر: |
2021 |
| المجموعة: |
Jultika - University of Oulu repository / Oulun yliopiston julkaisuarkisto |
| مصطلحات موضوعية: |
BL Lacertae objects: individual: Mrk 421, galaxies: active, methods: data analysis, methods: observational, radiation mechanisms: non-thermal |
| الوصف: |
We report a characterization of the multiband flux variability and correlations of the nearby (z = 0.031) blazar Markarian 421 (Mrk 421) using data from Metsähovi, Swift, Fermi-LAT, MAGIC, FACT, and other collaborations and instruments from 2014 November till 2016 June. Mrk 421 did not show any prominent flaring activity, but exhibited periods of historically low activity above 1 TeV (F> 1 TeV < 1.7 × 10⁻¹² ph cm⁻² s⁻¹) and in the 2–10 keV (X-ray) band (F2–10 keV < 3.6 × 10⁻¹¹ erg cm⁻² s⁻¹), during which the Swift-BAT data suggest an additional spectral component beyond the regular synchrotron emission. The highest flux variability occurs in X-rays and very high-energy (E > 0.1 TeV) gamma-rays, which, despite the low activity, show a significant positive correlation with no time lag. The HRkeV and HRTeV show the harder-when-brighter trend observed in many blazars, but the trend flattens at the highest fluxes, which suggests a change in the processes dominating the blazar variability. Enlarging our data set with data from years 2007 to 2014, we measured a positive correlation between the optical and the GeV emission over a range of about 60 d centred at time lag zero, and a positive correlation between the optical/GeV and the radio emission over a range of about 60 d centred at a time lag of \(43_{-6}^{+9}\) d. This observation is consistent with the radio-bright zone being located about 0.2 parsec downstream from the optical/GeV emission regions of the jet. The flux distributions are better described with a lognormal function in most of the energy bands probed, indicating that the variability in Mrk 421 is likely produced by a multiplicative process. |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| العلاقة: |
info:eu-repo/semantics/altIdentifier/pissn/0035-8711; info:eu-repo/semantics/altIdentifier/eissn/1365-2966 |
| الإتاحة: |
http://urn.fi/urn:nbn:fi-fe2021071341434Test |
| حقوق: |
info:eu-repo/semantics/openAccess ; © 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. |
| رقم الانضمام: |
edsbas.3F978BE6 |
| قاعدة البيانات: |
BASE |
