{"paper":{"title":"The Great Markarian 421 Flare of February 2010: Multiwavelength variability and correlation studies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Arbet Engels, A. Babi\\'c, A. Berti, A. Biland, A. Brill, A. C. Rovero, A. C. S. Readhead, A. De Angelis, A. Falcone, A. Fattorini, A. Fern\\'andez-Barral, A. Furniss, A. Gent, A. Hahn, A. J. Chromey, A. L\\\"ahteenm\\\"aki, A. Lamastra, Alan P. Marscher, Alberto C. Sadun, A. L\\'opez-Oramas, A. Moralejo, A. Niedzwiecki, A. N. Otte, A. Petrashyk, A. Pichel, A. Rugliancich, A. Somero, A. Stamerra, A. U. Abeysekara, A. Weinstein, A. Wilhelm, B. Banerjee, B. De Lotto, B. Jordan, B. Machado de Oliveira Fraga, B. Stevenson, B. Zitzer (VERITAS Collaboration), C. A. Johnson, C. Bigongiari, C. Fruck, C. Giuri, C. Maggio, C. M. Raiteri, C. Nigro, C. Righi, C. Rulten, D. A. Morozova, D. A. Williams, D. Baack, D. Dominis Prester, D. Dorner, D. Elsaesser, D. Fidalgo, D. Galindo, D. Green, D. Guberman, D. Hadasch, D. Horan, D. Hrupec, D. Kieda, D. Lelas, D. Mazin, D. Miceli, D. Morcuende, D. Nieto, D. Ninci, D. Paneque, D. Sobczynska, D. Strom, D. Zari\\'c (MAGIC Collaboration), E. Bernardini, E. Colombo, E. Do Souto Espi\\~nera, E. G. Larionova, E. Lindfors, E. Molina, E. Moretti, E. Prandini, E. Pueschel, E. Roache, F. Dazzi, F. Di Pierro, F. Krennrich, F. Leone, F. Longo, F. Tavecchio, G. Bonnoli, G. Busetto, G. Ceribella, G. Ferrara, G. H. Gillanders, G. H. Sembroski, G. Hughes, G. Madejski, G. Maneva, G. T. Richards, G. Vanzo, H. D. Aller, H. Kubo, H. Talvikki, I. Puljak, I. Sadeh, I. S. Troitsky, I. Sushch, I. Vovk, I. \\v{S}nidari\\'c, J. A. Barrio, J. Becerra Gonz\\'alez, J. Besenrieder, J. Cortina, J. Delgado, J. Dumm, J. H. Buckley, J. Herrera, J. Hoang, J. Holder, J. Kushida, J. L. Christiansen, J. L. Contreras, J. L. Richards, J. M. Miranda, J. M. Paredes, J. Palacio, J. P. Finley, J. Quinn, J. Rico, J. Sitarek, J. Tammi, J. Tyler, J. van Scherpenberg, J. Ward Moody, K. Ishio, K. Mannheim, K. Nilsson, K. Nishijima, K. Noda, K. Ragan, K. Satalecka, K. Shahinyan, L. A. Antonelli, L.A. Sigua, L. Bellizzi, L. Foffano, L. Font, L. Fortson, L. Maraschi, L. Nogu\\'es, L. Saha, M. Buchovecky, M. Delfino, M. Doro, M. F. Aller, M. Garczarczyk, M. Gaug, M.G. Nikolashvili, M. J. Lang, M. K. Daniel, M. Kertzman, M. Krause, M. L\\'opez, M. Makariev, M. Mallamaci, M. Manganaro, M. Mariotti, M. Mart\\'inez, M. Minev, M. Nievas Rosillo, M. Nievas-Rosillo, M. N\\\"othe, M. Palatiello, M. Peresano, M. Persic, M. Pohl, M. Rib\\'o, M. Santander, M. Strzys, M. T. Carini, M. Teshima, M. Tornikoski, M. Vazquez Acosta, M. V. Fonseca, M. Villata (Multiwavelength Partners), M. Will, N. Galante, N. Godinovi\\'c, N. Kelley-Hoskins, N. Park, N. Sahakyan, N. Torres-Alb\\`a, O. Blanch, O. Gueta, O. Hervet, O.M. Kurtanidze, P. Da Vela, P. G. Prada Moroni, P. Kaaret, P. Kar, P. Majumdar, P. Moriarty, P. Munar-Adrover, P. Pe\\~nil, P. S. Smith, P. Temnikov, P. T. Reynolds, P. Wilcox, Q. Feng, R. A. Ong, R. Bird, R. Brose, R. Carosi, R. J. Garc\\'ia L\\'opez, R. L\\'opez-Coto, R. Mirzoyan, R. Mukherjee, R. M. Wells, R. Paoletti, R. R. Prado, S. Ansoldi, S. Cikota, S. Covino, S. Einecke, S. Gallozzi, S. Gasparyan, S. Inoue, S. Kumar, S. Lombardi, S. Masuda, S. M. Colak, S. O'Brien, S.O. Kurtanidze, S. Paiano, S. P. Wakely, S. Sun, S. Tsujimoto, Svetlana G. Jorstad, T. B. Humensky, T. Hassan, T. Nelson, T. Saito, T. Sakamoto, T. Schweizer, T. Suri\\'c, T. Terzi\\'c, U. Barres de Almeida, U. Colin, V. A. Acciari, V. D'Elia, V. Fallah Ramazani, V. M. Larionov, V. Moreno, V. Neustroev, V. V. Vassiliev, W. Bednarek, W. Benbow, W. Bhattacharyya, W. Max-Moerbeck, W. Rhode, Y. Chai, Y. Iwamura","submitted_at":"2020-02-10T05:53:35Z","abstract_excerpt":"We report on variability and correlation studies using multiwavelength observations of the blazar Mrk 421 during the month of February, 2010 when an extraordinary flare reaching a level of $\\sim$27~Crab Units above 1~TeV was measured in very-high-energy (VHE) $\\gamma$-rays with the VERITAS observatory. This is the highest flux state for Mrk 421 ever observed in VHE $\\gamma$-rays. Data are analyzed from a coordinated campaign across multiple instruments including VHE $\\gamma$-ray (VERITAS, MAGIC), high-energy (HE) $\\gamma$-ray (Fermi-LAT), X-ray (Swift}, RXTE, MAXI), optical (including the GASP"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.03567","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.03567/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}