A1 Refereed original research article in a scientific journal

The 2009 multiwavelength campaign on Mrk 421: Variability and correlation studies




AuthorsAleksic J, Ansokli S, Antonelli LA, Antoranz P, Babic A, Bangale P, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Berger K, Bernardini E, Bilandli A, Bianch O, Bock RK, Bonnefoy S, Bonnoli G, Borracci F, Bretzi T, Carmona E, Carosi A, Fidalgo DC, Colin P, Colombo E, Contreras JL, Cortina J, Covino S, Da Vela P, Dazzi F, De Angelis A, De Caneva G, De Lotto B, Mendez CD, Doert M, Dominguez A, Prester DD, Dorner D, Doro M, Einecke S, Eisenacher D, Elsaesser D, Farina E, Ferenc D, Fonseca MV, Font L, Frantzen K, Fruck C, Lopez RJG, Garczarczyki M, Terrats DG, Gaug M, Giavitto G, Godinovic N, Munoz AG, Gozzini SR, Hadamek A, Hadasch D, Herrero A, Hildebrand D, Hose J, Hrupec D, Idec W, Kadenius V, Kellermann H, Knoetig ML, Krause J, Kushida J, La Barbera A, Lelas D, Lewandowska N, Lindfors E, Longo F, Lombardi S, Lopez M, Lopez-Coto R, Lopez-Oramas A, Lorenz E, Lozano I, Makariev M, Mallot K, Maneva G, Mankuzhiyil N, Mannheim K, Maraschi L, Marcote B, Mariotti M, Martinez M, Mazin D, Menzel U, Meucci M, Miranda JM, Mirzoyan R, Moralejo A, Munar-Adrover P, Nakajima D, Niedzwiecki A, Nilsson K, Nowak N, Orito R, Overkemping A, Paiano S, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Partini S, Persic M, Prada F, Moroni PGP, Prandini E, Preziuso S, Puljak I, Reinthal R, Rhode W, Ribo M, Rico J, Garcia JR, Rugamer S, Saggion A, Saito K, Salvati M, Satalecka K, Scalzotto V, Scapin V, Schuliz C, Schweizer T, Shore SN, Sillanpaa A, Sitarek J, Snidaric I, Sobczynska D, Spanier F, Stamatescu V, Stamerra A, Steinbring T, Storz J, Sun S, Suric T, Takalo L, Tavecchio F, Temnikov P, Terzic T, Tescaro D, Teshima M, Thaele J, Tibolla O, Torres DF, Toyama T, Treves A, Uellenbeck M, Vogler P, Wagner RM, Zandanel F, Zanin R, Archambault S, Behera B, Beilicke M, Benbow W, Bird R, Buckley JH, Bugaev V, Cerruti M, Chen X, Ciupik L, Collins-Hughes E, Cui W, Dumm J, Eisch JD, Falcone A, Federici S, Feng Q, Finley JP, Fleischhack H, Fortin P, Fortson L, Furniss A, Griffin S, Griffiths ST, Grube J, Gyuk G, Hanna D, Holder J, Hughes G, Humensky TB, Johnson CA, Kaaret P, Kertzman M, Khassen Y, Kieda D, Krawczynski H, Krennrich F, Kumar S, Lang MJ, Maier G, McArthur S, Meagher K, Moriarty P, Mukherjee R, Ong RA, Otte AN, Park N, Pichel A, Pohl M, Popkow A, Prokoph H, Quinn MJ, Ragan K, Rajotte J, Reynolds PT, Richards GT, Roache E, Rovero AC, Sembroski GH, Shahinyan K, Staszak D, Telezhinsky I, Theiling M, Tucci JV, Tyler J, Varlotta A, Wakely SP, Weekes TC, Weinstein A, Welsing R, Wilhelm A, Williams DA, Zitzer B, Villata M, Raiteri C, Aller HD, Aller MF, Chen WP, Jordan B, Koptelova E, Kurtanidze OM, Lahteenmak A, McBreen B, Larionov VM, Lin CS, Nikolashvili MG, Angelakis E, Capalbi M, Carraminana A, Carrasco L, Cassaro P, Cesarini A, Fuhrmann L, Giroletti M, Hovatta T, Krichbaum TP, Krimm HA, Max-Moerbeck W, Moody JW, Maccaferri G, Mori Y, Nestoras I, Orlati A, Pace C, Pearson R, Perri M, Readhead ACS, Richards JL, Sadun AC, Sakamoto T, Tammi J, Tornikoski M, Yatsu Y, Zook A

PublisherEDP SCIENCES S A

Publication year2015

JournalAstronomy and Astrophysics

Journal name in sourceASTRONOMY & ASTROPHYSICS

Journal acronymASTRON ASTROPHYS

Article numberARTN A126

Volume576

Number of pages18

ISSN0004-6361

DOIhttps://doi.org/10.1051/0004-6361/201424216


Abstract

Conclusions. The harder-when-brighter behavior in the X-ray spectra and the measured positive X-ray/VHE correlation during the 2009 multiwavelength campaign suggests that the physical processes dominating the emission during non-flaring states have similarities with those occurring during flaring activity. In particular, this observation supports leptonic scenarios as being responsible for the emission of Mrk 421 during non-flaring activity. Such a temporally extended X-ray /VHE correlation is not driven by any single flaring event, and hence is difficult to explain within the standard hadronic scenarios. The highest variability is observed in the X-ray band, which, within the one-zone synchrotron self-Compton scenario, indicates that the electron energy distribution is most variable at the highest energies.




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