H.E.S.S. observations of the flaring gravitationally lensed galaxy PKS 1830–211. Issue 3 (20th April 2019)

• Record Type: Journal Article
• Authors: Abdalla, H; Aharonian, F; Ait Benkhali, F; Angüner, E O; Arakawa, M; Arcaro, C; Armand, C; Arrieta, M; Backes, M; Barnard, M; Becherini, Y; Becker Tjus, J; Berge, D; Bernlöhr, K; Blackwell, R; Böttcher, M; Boisson, C; Bolmont, J; Bonnefoy, S; Bordas, P; Bregeon, J; Brun, F; Brun, P; Bryan, M; Büchele, M; Bulik, T; Bylund, T; Capasso, M; Caroff, S; Carosi, A; Casanova, S; Cerruti, M; Chakraborty, N; Chand, T; Chandra, S; Chaves, R C G; Chen, A; Colafrancesco, S; Condon, B; Davids, I D; Deil, C; Devin, J; deWilt, P; Dirson, L; Djannati-Ataï, A; Dmytriiev, A; Donath, A; Doroshenko, V; Drury, L O'C; Dyks, J; Egberts, K; Emery, G; Ernenwein, J-P; Eschbach, S; Fegan, S; Fiasson, A; Fontaine, G; Funk, S; Füßling, M; Gabici, S; Gallant, Y A; Gaté, F; Giavitto, G; Glawion, D; Glicenstein, J F; Gottschall, D; Grondin, M-H; Hahn, J; Haupt, M; Heinzelmann, G; Henri, G; Hermann, G; Hinton, J A; Hofmann, W; Hoischen, C; Holch, T L; Holler, M; Horns, D; Huber, D; Iwasaki, H; Jacholkowska, A; Jamrozy, M; Jankowsky, D; Jankowsky, F; Jouvin, L; Jung-Richardt, I; Kastendieck, M A; Katarzyński, K; Katsuragawa, M; Katz, U; Khangulyan, D; Khélifi, B; King, J; Klepser, S; Kluźniak, W; Komin, Nu; Kosack, K; Kraus, M; Lamanna, G; Lau, J; Lefaucheur, J; Lemière, A; Lemoine-Goumard, M; Lenain, J-P; Leser, E; Lohse, T; López-Coto, R; Lorentz, M; Lypova, I; Malyshev, D; Marandon, V; Marcowith, A; Mariaud, C; Martí-Devesa, G; Marx, R; Maurin, G; Meintjes, P J; Mitchell, A M W; Moderski, R; Mohamed, M; Mohrmann, L; Moore, C; Moulin, E; Murach, T; Nakashima, S; de Naurois, M; Ndiyavala, H; Niederwanger, F; Niemiec, J; Oakes, L; O'Brien, P; Odaka, H; Ohm, S; Ostrowski, M; Oya, I; Panter, M; Parsons, R D; Perennes, C; Petrucci, P-O; Peyaud, B; Piel, Q; Pita, S; Poireau, V; Priyana Noel, A; Prokhorov, D A; Prokoph, H; Pühlhofer, G; Punch, M; Quirrenbach, A; Raab, S; Rauth, R; Reimer, A; Reimer, O; Renaud, M; Rieger, F; Rinchiuso, L; Romoli, C; Rowell, G; Rudak, B; Ruiz-Velasco, E; Sahakian, V; Saito, S; Sanchez, D A; Santangelo, A; Sasaki, M; Schlickeiser, R; Schüssler, F; Schulz, A; Schutte, H; Schwanke, U; Schwemmer, S; Seglar-Arroyo, M; Senniappan, M; Seyffert, A S; Shafi, N; Shilon, I; Shiningayamwe, K; Simoni, R; Sinha, A; Sol, H; Specovius, A; Spir-Jacob, M; Stawarz, Ł; Steenkamp, R; Stegmann, C; Steppa, C; Takahashi, T; Tavernet, J-P; Tavernier, T; Taylor, A M; Terrier, R; Tiziani, D; Tluczykont, M; Trichard, C; Tsirou, M; Tsuji, N; Tuffs, R; Uchiyama, Y; van der Walt, D J; van Eldik, C; van Rensburg, C; van Soelen, B; Vasileiadis, G; Veh, J; Venter, C; Vincent, P; Vink, J; Voisin, F; Völk, H J; Vuillaume, T; Wadiasingh, Z; Wagner, S J; Wagner, R M; White, R; Wierzcholska, A; Yang, R; Yoneda, H; Zaborov, D; Zacharias, M; Zanin, R; Zdziarski, A A; Zech, A; Ziegler, A; Zorn, J; Żywucka, N;
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 486:Issue 3(2019)
• Page Start: 3886
• Page End: 3891
• Publication Date: 2019-04-20
• Subjects: gravitational lensing: strong -- diffuse radiation -- gamma-rays: galaxies; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stz1031
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: PKS 1830–211 is a known macrolensed quasar located at a redshift of z = 2.5. Its high-energy gamma-ray emission has been detected with the Fermi- Large Area Telescope (LAT) instrument and evidence for lensing was obtained by several authors from its high-energy data. Observations of PKS 1830–211 were taken with the High Energy Stereoscopic System (H.E.S.S.) array of Imaging Atmospheric Cherenkov Telescopes in 2014 August, following a flare alert by the Fermi- LAT Collaboration. The H.E.S.S observations were aimed at detecting a gamma-ray flare delayed by 20–27 d from the alert flare, as expected from observations at other wavelengths. More than 12 h of good-quality data were taken with an analysis threshold of ∼67 GeV. The significance of a potential signal is computed as a function of the date and the average significance over the whole period. Data are compared to simultaneous observations by Fermi- LAT. No photon excess or significant signal is detected. An upper limit on PKS 1830–211 flux above 67 GeV is computed and compared to the extrapolation of the Fermi- LAT flare spectrum.