{"paper":{"title":"Long-term monitoring of PKS 2155$-$304 with ATOM and H.E.S.S.: investigation of optical/$\\gamma$-ray correlations in different spectral states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Abramowski, A.A. Zdziarski, A. Balzer, A. Barnacka, A. Djannati-Ata\\\"i, A. Donath, A. Fiasson, A. F\\\"orster, A.G. Akhperjanian, A. Hillert, A. Ivascenko, A. Jacholkowska, A. Lemi\\`ere, A. Lopatin, A. Marcowith, A.M. Taylor, A.M.W. Mitchell, A. Quirrenbach, A. Reimer, A. Santangelo, A. Schulz, A. Viana, A. Wierzcholska, A. W\\\"ornlein, A. Zech, B. Degrange, B. Giebels, B. Kh\\'elifi, B. Opitz, B. Peyaud, B. Rudak, B. van Soelen, C. Boisson, C.B. Rulten, C.-C. Lu, C. Couturier, C. Deil, C. Farnier, C. Jahn, C. Romoli, C. Stegmann, C. Trichard, C. van Eldik, C. Venter, D.A. Sanchez, D. Berge, D. Fernandez, D. Gottschall, D. Hadsch, D. Horns, D. Klochkov, D. Kolitzus, D. Salek, D. Wouters, D. Zaborov, E. Birsin, E. Moulin, E.O. Ang\\\"uner, F. Aharonian, F. Ait Benkhali, F. Brun, F. Feinstein, F. Jankowsky, F. Krayzel, F. Rieger, F. Sch\\\"ussler, F. Spanier, F. Spies, F. Stinzing, F. Volpe, G. Cologna, G. Dubus, G. Fontaine, G. Giavitto, G. Heinzelmann, G. Henri, G. Hermann, G. Lamanna, G. Maurin, G. Pelletier, G. P\\\"uhlhofer, G. Rowell, G. Spengler, G. Vasileiadis, H.J. V\\\"olk, H. Laffon, H. Odaka, H. Poon, H. Sol, H.-S. Zechlin (H.E.S.S. Collaboration), I.D. Davids, I. Jung, I. Oya, I. Reichardt, I. Sushch, J.A. Hinton, J. Becker Tjus, J. Biteau, J. Bolmont, J. Bregeon, J. Conrad, J. Dyks, J.F. Glicenstein, J. Hahn, J. Harris, J. Lefaucheur, J. M\\'ehault, J. Niemiec, J. Perez, J.-P. Lenain, J.-P. Tavernet, J. Veh, J. Vink, K. Bernl\\\"ohr, K. Dutson, K. Egberts, K. Katarzy\\'nski, K. Kosack, K. Mor{\\aa}, K. Stycz, K. Valerius, L. Oakes, L.O'C. Drury, L. Rob, \\L. Stawarz, M.A. Kastendieck, M. Backes, M. B\\\"ottcher, M. Bryan, M. Chr\\'etien, M. Dalton, M. de Naurois, M. Dyrda, M. F\\\"u{\\ss}ling, M. Gajdus, M. Grudzi\\'nska, M.-H. Grondin, M. Holler, M. Jamrozy, M. Janiak, M. Kieffer, M. Lemoine-Goumard, M. Mayer, M. Meyer, M. Mohamed, M. Ostrowski, M. Panter, M. Paz Arribas, M. Punch, M. Renaud, M. Tluczykont, M.V. Fernandes, M. Vorster, M. Ward, M. Weidinger, M. Zacharias, N. Chakraborty, N. Maxted, Nu. Komin, N.W. Pekeur, O. Hervet, O. Reimer, P. Bordas, P. Brun, P. deWilt, P. Eger, P. Espigat, P. Hofverberg, P.J. Meintjes, P.M. Chadwick, P.-O. Petrucci, P.P. Kr\\\"uger, P. Vincent, P. Wagner, P. Willmann, Q. Weitzel, R.C.G. Chaves, R. Chalme-Calvet, R. de los Reyes, R.D. Parsons, R. Marx, R. Moderski, R.M. Wagner, R. Schlickeiser, R. Steenkamp, R. Terrier, R. White, R. Yang, S. Balenderan, S. Bernhard, S. Carrigan, S. Casanova, S. Colafrancesco, S. Fegan, S. Gabici, S. H\\\"affner, S.J. Nolan, S.J. Wagner, S. Kaufmann, S. Klepser, S. Krakau, S. Ohm, S. Pita, S. Raab, S. Rosier-Lees, S. Schwarzburg, S. Schwemmer, T. Bulik, T. Edwards, T. Garrigoux, T.J.L. McComb, T. Lohse, T. Murach, T. Tavernier, T. Vuillaume, U. Katz, U. Menzler, U. Schwanke, V. Lefranc, V. Marandon, V. Sahakian, V. Zabalza, W. Domainko, W. Hofmann, W. Klu\\'zniak, Y.A. Gallant, Y. Becherini, Y. Cui","submitted_at":"2014-08-31T19:07:26Z","abstract_excerpt":"In this paper we report on the analysis of all the available optical and very high-energy $\\gamma$-ray ($>$200 GeV) data for the BL Lac object PKS 2155$-$304, collected simultaneously with the ATOM and H.E.S.S. telescopes from 2007 until 2009. This study also includes X-ray (RXTE, Swift) and high-energy $\\gamma$-ray (Fermi-LAT) data. During the period analysed, the source was transitioning from its flaring to quiescent optical states,and was characterized by only moderate flux changes at different wavelengths on the timescales of days and months. A flattening of the optical continuum with an i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.0253","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":""},"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"}