First detection of VHE gamma-ray emission from TXS 1515–273, study of its X-ray variability and spectral energy distribution
- Acciari, V. A.
- Ansoldi, S.
- Barrio, J. A.
- Loporchio, S.
- Fraga, B. Machado de Oliveira
- Maggio, C.
- Majumdar, P.
- Makariev, M.
- Mallamaci, M.
- Maneva, G.
- Manganaro, M.
- Mannheim, K.
- Maraschi, L.
- Batković, I.
- Mariotti, M.
- Martínez, M.
- Mazin, D.
- Menchiari, S.
- Mender, S.
- Mićanović, S.
- Miceli, D.
- Miener, T.
- Minev, M.
- Miranda, J. M.
- González, J. Becerra
- Mirzoyan, R.
- Molina, E.
- Moralejo, A.
- Morcuende, D.
- Moreno, V.
- Moretti, E.
- Neustroev, V.
- Nigro, C.
- Nilsson, K.
- Nishijima, K.
- Bednarek, W.
- Noda, K.
- Nozaki, S.
- Ohtani, Y.
- Oka, T.
- Otero-Santos, J.
- Paiano, S.
- Palatiello, M.
- Paneque, D.
- Paoletti, R.
- Paredes, J. M.
- Bellizzi, L.
- Pavletić, L.
- Peñil, P.
- Perennes, C.
- Persic, M.
- Moroni, P. G. Prada
- Prandini, E.
- Priyadarshi, C.
- Puljak, I.
- Rhode, W.
- Ribó, M.
- Bernardini, E.
- Rico, J.
- Righi, C.
- Rugliancich, A.
- Saha, L.
- Sahakyan, N.
- Saito, T.
- Sakurai, S.
- Satalecka, K.
- Saturni, F. G.
- Schleicher, B.
- Bernardos, M.
- Schmidt, K.
- Schweizer, T.
- Sitarek, J.
- Šnidarić, I.
- Sobczynska, D.
- Spolon, A.
- Stamerra, A.
- Strom, D.
- Strzys, M.
- Suda, Y.
- Berti, A.
- Surić, T.
- Takahashi, M.
- Tavecchio, F.
- Temnikov, P.
- Terzić, T.
- Teshima, M.
- Tosti, L.
- Truzzi, S.
- Tutone, A.
- Ubach, S.
- Besenrieder, J.
- van Scherpenberg, J.
- Vanzo, G.
- Acosta, M. Vazquez
- Ventura, S.
- Verguilov, V.
- Vigorito, C. F.
- Vitale, V.
- Vovk, I.
- Will, M.
- Wunderlich, C.
- Bhattacharyya, W.
- Zaric, D.
- Bissaldi, E.
- Bonnoli, G.
- Cutini, S.
- D'Ammando, F.
- Nabizadeh, A.
- Marchini, A.
- Orienti, M.
- MAGIC Collaboration
- Antonelli, L. A.
- Bigongiari, C.
- Biland, A.
- Blanch, O.
- Bošnjak, Ž.
- Busetto, G.
- Carosi, R.
- Ceribella, G.
- Cerruti, M.
- Chai, Y.
- Chilingarian, A.
- Engels, A. Arbet
- Cikota, S.
- Colak, S. M.
- Colombo, E.
- Contreras, J. L.
- Cortina, J.
- Covino, S.
- D'Amico, G.
- D'Elia, V.
- Da Vela, P.
- Dazzi, F.
- Artero, M.
- De Angelis, A.
- De Lotto, B.
- Delfino, M.
- Delgado, J.
- Mendez, C. Delgado
- Depaoli, D.
- Di Pierro, F.
- Di Venere, L.
- Espiñeira, E. Do Souto
- Prester, D. Dominis
- Asano, K.
- Donini, A.
- Dorner, D.
- Doro, M.
- Elsaesser, D.
- Ramazani, V. Fallah
- Fattorini, A.
- Ferrara, G.
- Fonseca, M. V.
- Font, L.
- Fruck, C.
- Baack, D.
- Fukami, S.
- López, R. J. García
- Garczarczyk, Markus
- Gasparyan, S.
- Gaug, M.
- Giglietto, N.
- Giordano, F.
- Gliwny, P.
- Godinović, N.
- Green, J. G.
- Babić, A.
- Green, D.
- Hadasch, D.
- Hahn, A.
- Heckmann, L.
- Herrera, J.
- Hoang, J.
- Hrupec, D.
- Hütten, M.
- Inada, T.
- Inoue, S.
- Baquero, A.
- Ishio, K.
- Iwamura, Y.
- Jiménez, I.
- Jormanainen, J.
- Jouvin, L.
- Kajiwara, Y.
- Karjalainen, M.
- Kerszberg, D.
- Kobayashi, Y.
- Kubo, H.
- de Almeida, U. Barres
- Kushida, J.
- Lamastra, A.
- Lelas, D.
- Leone, F.
- Lindfors, E.
- Lombardi, S.
- Longo, F.
- López-Coto, R.
- López-Moya, M.
- López-Oramas, A.
DOIAbstract
We report here on the first multiwavelength (MWL) campaign on the blazar TXS 1515–273, undertaken in 2019 and extending from radio to very-high-energy gamma-rays (VHE). Up until now, this blazar had not been the subject of any detailed MWL observations. It has a rather hard photon index at GeV energies and was considered a candidate extreme high-synchrotron-peaked source. MAGIC observations resulted in the first-time detection of the source in VHE with a statistical significance of 7.6σ. The average integral VHE flux of the source is 6 ± 1 per cent of the Crab nebula flux above 400 GeV. X-ray coverage was provided by Swift-XRT, XMM–Newton, and NuSTAR. The long continuous X-ray observations were separated by ∼9 h, both showing clear hour sca...
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