Simultaneous multiwavelength observations of the second exceptional gamma-ray flare of PKS 2155-304 in July 2006
- Aharonian, F.
- Akhperjanian, A.G.
- Anton, G.
- Barres de Almeida, U.
- Bazer-Bachi, A.R.
- Becherini, Y.
- Behera, B.
- Bernlöhr, K.
- Bochow, A.
- Boisson, C.
- Borrel, V.
- Boutelier, T.
- Braun, I.
- Brion, E.
- Brucker, J.
- Brun, P.
- Bühler, R.
- Bulik, T.
- Büsching, I.
- Chadwicks, P.M.
- Charbonnier, A.
- Chaves, R.C.G.
- Cheesebrough, A.
- Chounet, L.-M.
- Clapson, A.C.
- Coignet, G.
- Dalton, M.
- Daniel, M.K.
- Davids, I.D.
- Degrange, B.
- Deil, C.
- Dickinson, H.J.
- Djannati-Ataï, A.
- Domainko, W.
- Drury, L.O'C.
- Dubois, F.
- Dubus, G.
- Dyks, J.
- Dyrda, M.
- Egberts, K.
- Emmanoulopoulos, D.
- Espigat, P.
- Farnier, C.
- Feinstein, F.
- Fiasson, A.
- Förster, A.
- Fontaine, G.
- Füssling, M.
- Gabici, S.
- Gallant, Y.A.
- Gérard, L.
- Giebels, B.
- Glicenstein, J.F.
- Glück, B.
- Goret, P.
- Hauser, D.
- Hauser, M.
- Heinz, S.
- Heinzelmann, G.
- Henri, G.
- Hermann, G.
- Hinton, J.A.
- Hoffmann, A.
- Hofmann, W.
- Holleran, M.
- Hoppe, S.
- Horns, D.
- Jacholkowska, A.
- de Jager, O.C.
- Jung, I.
- Katarzynski, K.
- Katz, U.
- Kendziorra, E.
- Kerschhagg, M.
- Khangulyan, D.
- Khélifi, B.
- Keogh, D.
- Komin, Nu.
- Kosack, K.
- Lamanna, G.
- Lenain, J.-P.
- Lohse, T.
- Marandon, V.
- Martin, J.M.
- Martineau-Huynh, O.
- Marcowith, A.
- Masterson, C.
- Maurin, D.
- Mccomb, T.J.L.
- Medina, M.C.
- Moderski, R.
- Moulin, Emmanuel
- Naumann-Godo, M.
- de Naurois, M.
- Nedbal, D.
- Nekrassov, D.
- Niemiec, J.
- Nolan, S.J.
- Ohm, S.
- Olive, J.-P.
- de Ona Wilhelmi, E.
- Orford, K.J.
- Ostrowski, M.
- Panter, M.
- Paz Arribas, M.
- Pedaletti, G.
- Pelletier, G.
- Petrucci, P.-O.
- Pita, S.
- P¨uhlhofer, G.
- Punch, M.
- Quirrenbach, A.
- Raubenheimer, B.C.
- Raue, M.
- Rayner, S.M.
- Renaud, M.
- Rieger, F.
- Ripken, J.
- Rob, L.
- Rosier-Lees, S.
- Rowell, G.
- Rudak, B.
- Rulten, C.B.
- Ruppel, J.
- Sahakian, V.
- Santangelo, A.
- Schlickeiser, R.
- Schock, F.
- Schroder, R.
- Schwanke, U.
- Schwarzburg, S.
- Schwemmer, S.
- Shalchi, A.
- Skilton, J.L.
- Sol, H.
- Spangler, D.
- Stawarz, Ł.
- Steenkamp, R.
- Stegmann, C.
- Superina, G.
- Szostek, A.
- Tam, P.H.
- Tavernet, J.-P.
- Terrier, R.
- Tibolla, O.
- van Eldik, C.
- Vasileiadis, G.
- Venter, C.
- Venter, L.
- Vialle, J.P.
- Vincent, P.
- Vivier, M.
- Volk, H.J.
- Volpe, F.
- Wagner, S.J.
- Ward, M.
- Zdziarski, A.A.
- Zech, A.
DOIAbstract
22 pages, 16 figuresSimultaneous HESS/CHANDRA/optical observations were performed on the BL Lac object PKS 2155-304 in the night of July 29-30 2006, when the source underwent its second major gamma-ray outburst in Summer 2006. This event took place about 44 hours after the July 28 outburst, known for its ultrafast variability. An unprecedented 6 to 8 hours of uninterrupted coverage was achieved, with spectra and light curves measured down to 7 and 2-minute timescales, respectively. The gamma-ray flux reached a maximum of 11x the Crab flux (>400 GeV), with rise/decay timescales of ~1 hour, plus a few smaller-amplitude flares superimposed on the decaying phase. The emission in the X-ray and VHE bands is strongly correlated, both in flux and s...
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