HESS Observations and VLT Spectroscopy of PG 1553+113
- Aharonian, F.
- Akhperjanian, A.G.
- Barres de Almeida, U.
- Bazer-Bachi, A.R.
- Behera, B.
- Beilicke, M.
- Benbow, W.
- Bernlohr, K.
- Boisson, C.
- Bolz, O.
- Borrel, V.
- Braun, I.
- Brion, E.
- Brown, A.M.
- Buhler, R.
- Bulik, T.
- Busching, I.
- Boutelier, T.
- Carrigan, S.
- Chadwick, P.M.
- Chounet, L.-M.
- Clapson, A.C.
- Coignet, G.
- Cornils, R.
- Costamante, L.
- Dalton, M.
- Degrange, B.
- Dickinson, H.J.
- Djannati-Ataï, A.
- Domainko, W.
- Drury, L.O'C.
- Dubois, F.
- Dubus, G.
- Dyks, J.
- Egberts, K.
- Emmanoulopoulos, D.
- Espigat, P.
- Farnier, C.
- Feinstein, F.
- Fiasson, A.
- Forster, A.
- Fontaine, G.
- Funk, Seb.
- Fusling, M.
- Gallant, Y.A.
- Giebels, B.
- Glicenstein, J.F.
- Gluck, B.
- Goret, P.
- Hadjichristidis, C.
- Hauser, D.
- Hauser, M.
- 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.
- Kendziorra, E.
- Kerschhaggl, M.
- Khelifi, B.
- Keogh, D.
- Komin, Nu.
- Kosack, K.
- Lamanna, G.
- Latham, I.J.
- Lemiere, A.
- Lemoine-Goumard, M.
- Lenain, J.-P.
- Lohse, T.
- Martin, J.M.
- Martineau-Huynh, O.
- Marcowith, A.
- Masterson, C.
- Maurin, D.
- Maurin, G.
- Mccomb, T.J.L.
- Moderski, R.
- Moulin, Emmanuel
- de Naurois, M.
- Nedbal, D.
- Nolan, S.J.
- Ohm, S.
- Olive, J.-P.
- de Ona Wilhelmi, E.
- Orford, K.J.
- Osborne, J.L.
- Ostrowski, M.
- Panter, M.
- Pedaletti, G.
- Pelletier, G.
- Petrucci, P.-O.
- Pita, S.
- Puhlhofer, G.
- Punch, M.
- Ranchon, S.
- Raubenheimer, B.C.
- Raue, M.
- Rayner, S.M.
- Renaud, M.
- Ripken, J.
- Rob, L.
- Rolland, L.
- Rosier-Lees, S.
- Rowell, G.
- Rudak, B.
- Ruppel, J.
- Sahakian, V.
- Santangelo, A.
- Schlickeiser, R.
- Schock, F.
- Schroder, R.
- Schwanke, U.
- Schwarzburg, S.
- Schwemmer, S.
- Shalchi, A.
- Sol, H.
- Spangler, D.
- Stawarz, L.
- Steenkamp, R.
- Stegmann, C.
- Superina, G.
- Tam, P.H.
- Tavernet, J.-P.
- Terrier, R.
- van Eldik, C.
- Vasileiadis, G.
- Venter, C.
- Vialle, J.P.
- Vincent, P.
- Vivier, M.
- Volk, H.J.
- Volpe, F.
- Wagner, S.J.
- Ward, M.
- Zdziarski, A.A.
- Zech, A.
DOIAbstract
9 pages, 12 Figures; Accepted for publication in Astronomy & AstrophysicsAIMS: The properties of the very high energy (VHE; E>100 GeV) gamma-ray emission from the high-frequency peaked BL Lac PG 1553+113 are investigated. An attempt is made to measure the currently unknown redshift of this object. METHODS: VHE Observations of PG 1553+113 were made with the High Energy Stereoscopic System (HESS) in 2005 and 2006. H+K (1.45-2.45 micron) spectroscopy of PG 1553+113 was performed in March 2006 with SINFONI, an integral field spectrometer of the ESO Very Large Telescope (VLT) in Chile. RESULTS: A VHE signal, ~10 standard deviations, is detected by HESS during the 2 years of observations (24.8 hours live time). The integral flux above 300 GeV is ...
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