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Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance

  • H. Abdalla
  • , R. Adam
  • , F. Aharonian
  • , F. Ait Benkhali
  • , E. O. Angüner
  • , M. Arakawa
  • , C. Arcaro
  • , C. Armand
  • , T. Armstrong
  • , H. Ashkar
  • , M. Backes
  • , V. Baghmanyan
  • , V. Barbosa Martins
  • , A. Barnacka
  • , M. Barnard
  • , Y. Becherini
  • , D. Berge
  • , K. Bernlöhr
  • , M. Böttcher
  • , C. Boisson
  • J. Bolmont, S. Bonnefoy, J. Bregeon, M. Breuhaus, F. Brun, P. Brun, M. Bryan, M. Büchele, T. Bulik, T. Bylund, S. Caroff, A. Carosi, S. Casanova, T. Chand, S. Chandra, A. Chen, G. Cotter, M. Curyło, I. D. Davids, J. Davies, C. Deil, J. Devin, P. Dewilt, L. Dirson, A. Djannati-Ataï, A. Dmytriiev, A. Donath, V. Doroshenko, J. Dyks, K. Egberts, F. Eichhorn, G. Emery, J. P. Ernenwein, K. Feijen, S. Fegan, A. Fiasson, G. Fontaine, S. Funk, M. Füßling, S. Gabici, Y. A. Gallant, G. Giavitto, L. Giunti, D. Glawion, J. F. Glicenstein, D. Gottschall, M. H. Grondin, J. Hahn, M. Haupt, G. Hermann, J. A. Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, M. Hörbe, D. Horns, D. Huber, H. Iwasaki, M. Jamrozy, D. Jankowsky, F. Jankowsky, A. Jardin-Blicq, V. Joshi, I. Jung-Richardt, M. A. Kastendieck, K. Katarzyński, M. Katsuragawa, U. Katz, D. Khangulyan, B. Khélifi, S. Klepser, W. Kluźniak, Nu Komin, R. Konno, K. Kosack, D. Kostunin, M. Kreter, G. Lamanna, A. Lemière, M. Lemoine-Goumard, J. P. Lenain, E. Leser, C. Levy, T. Lohse, I. Lypova, J. Mackey, J. Majumdar, D. Malyshev, D. Malyshev, V. Marandon, P. Marchegiani, A. Marcowith, A. Mares, G. Martí-Devesa, R. Marx, G. Maurin, P. J. Meintjes, R. Moderski, M. Mohamed, L. Mohrmann, C. Moore, P. Morris, E. Moulin, J. Muller, T. Murach, S. Nakashima, K. Nakashima, M. De Naurois, H. Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, P. O'brien, H. Odaka, S. Ohm, E. De Oña Wilhelmi, M. Ostrowski, M. Panter, R. D. Parsons, B. Peyaud, Q. Piel, S. Pita, V. Poireau, A. P. Noel, D. A. Prokhorov, H. Prokoph, G. Pühlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V. Sahakian, S. Sailer, S. Saito, D. A. Sanchez, A. Santangelo, M. Sasaki, M. Scalici, F. Schüssler, H. M. Schutte, U. Schwanke, S. Schwemmer, M. Seglar-Arroyo, M. Senniappan, A. S. Seyffert, N. Shafi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, A. Specovius, S. Spencer, M. Spir-Jacob, L. Stawarz, R. Steenkamp, C. Stegmann, C. Steppa, T. Takahashi, T. Tavernier, A. M. Taylor, R. Terrier, D. Tiziani, M. Tluczykont, L. Tomankova, C. Trichard, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, D. J. Van Der Walt, C. Van Eldik, C. Van Rensburg, B. Van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, J. Vink, H. J. Völk, T. Vuillaume, Z. Wadiasingh, S. J. Wagner, J. Watson, F. Werner, R. White, A. Wierzcholska, R. Yang, H. Yoneda, M. Zacharias, R. Zanin, D. Zargaryan, A. A. Zdziarski, A. Zech, S. J. Zhu, J. Zorn, N. Zywucka, M. Cerruti
  • North-West University
  • Max-Planck-Institut für Kernphysik
  • Dublin Institute for Advanced Studies
  • Russian-Armenian University
  • Aix Marseille Université
  • Rikkyo University
  • LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
  • University of Oxford
  • Université Paris-Saclay
  • University of Namibia
  • Institute for Nuclear Physics
  • c/o DESY
  • Jagiellonian University
  • Linnaeus University, Växjö
  • Sorbonne Univ.
  • Sorbonne Université
  • Laboratoire Univers et Particules de Montpellier
  • University of Amsterdam
  • Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
  • University of Warsaw
  • University of the Witwatersrand, Johannesburg
  • Univ. Bordeaux
  • University of Adelaide
  • Universität Hamburg
  • Laboratoire de Probabilités et Modèles Aléatoires
  • University of Tübingen
  • Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
  • University of Potsdam
  • Landessternwarte Heidelberg
  • Humboldt-Universität zu Berlin
  • University of Innsbruck
  • Nicolaus Copernicus University
  • University of Tokyo
  • University of the Free State
  • University of Leicester
  • Riken
  • Yerevan Physics Institute
  • Ruhr-University Bochum
  • University of Barcelona

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

We report on the detection of very high energy (VHE; E > 100 GeV) γ-ray emission from the BL Lac objects KUV 00311-1938 and PKS 1440-389 with the High Energy Stereoscopic System (H.E.S.S.). H.E.S.S. observations were accompanied or preceded by multiwavelength observations with Fermi/LAT, XRT and UVOT onboard the Swift satellite, and ATOM. Based on an extrapolation of the Fermi/LAT spectrum towards the VHE γ-ray regime, we deduce a 95 per cent confidence level upper limit on the unknown redshift of KUV 00311-1938 of z < 0.98 and of PKS 1440-389 of z < 0.53. When combined with previous spectroscopy results, the redshift of KUV 00311-1938 is constrained to 0.51 ≤ z < 0.98 and of PKS 1440-389 to 0.14 z < 0.53.

langue originaleAnglais
Pages (de - à)5590-5602
Nombre de pages13
journalMonthly Notices of the Royal Astronomical Society
Volume494
Numéro de publication4
Les DOIs
étatPublié - 1 juin 2020

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