MAGIC reveals a complex morphology within the unidentified gamma-ray source HESS J1857+026
- Aleksića, J
- Ansoldi, S.
- Antonelli, L.A.
- Antoranz, P.
- Babic, A.
- Bangale, P.
- De Almeida, U. Barres
- Barrio, J.A.
- González, J. Becerra
- Bednarek, W.
- Bernardini, E.
- Biland, A.
- Blanch, O.
- Bonnefoy, S.
- Bonnoli, G.
- Borracci, F.
- Bretz, T.
- Carmona, E.
- Carosi, A.
- Fidalgo, D. Carreto
- Colin, P.
- Colombo, E.
- Contreras, J.L.
- Cortina, J.
- Covino, S.
- Da Vela, P.
- Dazzi, F.
- De Angelis, A.
- De Caneva, G.
- De Lotto, B.
- Mendez, C. Delgado
- Doert, M.
- Domínguez, A.
- Prester, D. Dominis
- Dorner, D.
- Doro, M.
- Einecke, S.
- Eisenacher, D.
- Elsaesser, D.
- Farina, E.
- Ferenc, D.
- Fonseca, M.V.
- Font, L.
- Frantzen, K.
- Fruck, C.
- López, R.J. García
- Garczarczyk, M.
- Terrats, D. Garrido
- Gaug, M.
- Godinović, N.
- Muñoz, A. González
- Gozzini, S.R.
- Hadasch, D.
- Hayashida, M.
- Herrera, J.
- Herrero, A.
- Hildebrand, D.
- Hose, J.
- Hrupec, D.
- Idec, W.
- Kadenius, V.
- Kellermann, H.
- Klepser, S.
- Kodani, K.
- Konno, Y.
- Krause, J.
- Kubo, H.
- Kushida, J.
- La Barbera, A.
- Lelas, D.
- Lewandowska, N.
- Lindfors, E.
- Lombardi, S.
- López, M.
- López-Coto, R.
- López-Oramas, A.
- Lorenz, E.
- Lozano, I.
- Makariev, M.
- Mallot, K.
- Maneva, G.
- Mankuzhiyi, N.
- Mannheim, K.
- Maraschi, L.
- Marcote, B.
- Mariotti, M.
- Martínez, M.
- Mazin, D.
- Menze, U.
- Meucci, M.
- Miranda, J.M.
- Mirzoyan, R.
- Moralejo, A.
- Munar-Adrover, P.
- Nakajima, D.
- Niedzwiecki, A.
- Nilsson, K.
- Nishijima, K.
- Noda, K.
- Nowak, N.
- De Oñawilhelmi, E.
- Orito, R.
- Overkemping, A.
- Paiano, S.
- Palatiello, M.
- Paneque, D.
- Paoletti, R.
- Paredes, J.M.
- Paredes-Fortuny, X.
- Partini, S.
- Persic, M.
- Prada, F.
- Moroni, P.G. Prada
- Prandini, E.
- Preziuso, S.
- Puljak, I.
- Reinthal, R.
- Rhode, W.
- Ribó, M.
- Rico, J.
- Garcia, J. Rodriguez
- Rügamer, S.
- Saggion, A.
- Saito, T.
- Saito, K.
- Satalecka, K.
- Scalzotto, V.
- Scapin, V.
- Schultz, C.
- Schweizer, T.
- Shore, S.N.
- Sillanpää, A.
- Sitarek, J.
- Snidaric, I.
- Sobczynska, D.
- Spanier, F.
- Stamatescu, V.
- Stamerra, A.
- Steinbring, T.
- Storz, J.
- Strzys, M.
- Sun, S.
- Surić, T.
- Takalo, L.
- Takami, H.
- Tavecchio, F.
- Temnikov, P.
- Terzić, T.
- Tescaro, D.
- Teshima, M.
- Thaele, J.
- Tibolla, O.
- Torres, D.F.
- Toyama, T.
- Treves, A.
- Uellenbeck, M.
- Vogler, P.
- Wagner, R.M.
- Zandanel, F.
- Zanin, R.
DOIAbstract
Aims: HESS J1857+026 is an extended TeV gamma-ray source that was discovered by H.E.S.S. as part of its Galactic plane survey. Given its broadband spectral energy distribution and its spatial coincidence with the young energetic pulsar PSR J1856+0245, the source has been put forward as a pulsar wind nebula (PWN) candidate. MAGIC has performed follow-up observations aimed at mapping the source down to energies approaching 100 GeV in order to better understand its complex morphology. Methods: HESS J1857+026 was observed by MAGIC in 2010, yielding 29 h of good quality stereoscopic data that allowed us to map the source region in two separate ranges of energy. Results: We detected very-high-energy gamma-ray emission from HESS J1857+026 with...
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