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

Authors :
Collaboration, H. E. S. S.
Abdalla, H.
Adam, R.
Aharonian, F.
Benkhali, F. Ait
Angüner, E. O.
Arakawa, M.
Arcaro, C.
Armand, C.
Armstrong, T.
Ashkar, H.
Backes, M.
Baghmanyan, V.
Martins, V. Barbosa
Barnacka, A.
Barnard, M.
Becherini, Y.
Berge, D.
Bernlöhr, K.
Böttcher, M.
Boisson, C.
Bolmont, J.
Bonnefoy, S.
Bregeon, J.
Breuhaus, M.
Brun, F.
Brun, P.
Bryan, M.
Büchele, M.
Bulik, T.
Bylund, T.
Caroff, S.
Carosi, A.
Casanova, S.
Chand, T.
Chandra, S.
Chen, A.
Cotter, G.
Curyło, M.
Davids, I. D.
Davies, J.
Deil, C.
Devin, J.
deWilt, P.
Dirson, L.
Djannati-Ataï, A.
Dmytriiev, A.
Donath, A.
Doroshenko, V.
Dyks, J.
Egberts, K.
Eichhorn, F.
Emery, G.
Ernenwein, J. -P.
Feijen, K.
Fegan, S.
Fiasson, A.
Fontaine, G.
Funk, S.
Füßling, M.
Gabici, S.
Gallant, Y. A.
Giavitto, G.
Giunti, L.
Glawion, D.
Glicenstein, J. F.
Gottschall, D.
Grondin, M. -H.
Hahn, J.
Haupt, M.
Hermann, G.
Hinton, J. A.
Hofmann, W.
Hoischen, C.
Holch, T. L.
Holler, M.
H{\"}orbe, M.
Horns, D.
Huber, D.
Iwasaki, H.
Jamrozy, M.
Jankowsky, D.
Jankowsky, F.
Jardin-Blicq, A.
Joshi, V.
Jung-Richardt, I.
Kastendieck, M. A.
Katarzynski, K.
Katsuragawa, M.
Katz, U.
Khangulyan, D.
Khélifi, B.
Klepser, S.
Kluzniak, W.
Komin, Nu.
Konno, R.
Kosack, K.
Kostunin, D.
Kreter, M.
Lamanna, G.
Lemière, A.
Lemoine-Goumard, M.
Lenain, J. -P.
Leser, E.
Levy, C.
Lohse, T.
Lypova, I.
Mackey, J.
Majumdar, J.
Malyshev, D.
Marandon, V.
Marchegiani, P.
Marcowith, A.
Mares, A.
Martí-Devesa, G.
Marx, R.
Maurin, G.
Meintjes, P. J.
Moderski, R.
Mohamed, M.
Mohrmann, L.
Moore, C.
Morris, P.
Moulin, E.
Muller, J.
Murach, T.
Nakashima, S.
Nakashima, K.
de Naurois, M.
Ndiyavala, H.
Niederwanger, F.
Niemiec, J.
Oakes, L.
O'Brien, P.
Odaka, H.
Ohm, S.
Wilhelmi, E. de Ona
Ostrowski, M.
Panter, M.
Parsons, R. D.
Peyaud, B.
Piel, Q.
Pita, S.
Poireau, V.
Noel, A. Priyana
Prokhorov, D. A.
Prokoph, H.
Pühlhofer, G.
Punch, M.
Quirrenbach, A.
Raab, S.
Rauth, R.
Reimer, A.
Reimer, O.
Remy, Q.
Renaud, M.
Rieger, F.
Rinchiuso, L.
Romoli, C.
Rowell, G.
Rudak, B.
Ruiz-Velasco, E.
Sahakian, V.
Sailer, S.
Saito, S.
Sanchez, D. A.
Santangelo, A.
Sasaki, M.
Scalici, M.
Schüssler, F.
Schutte, H. M.
Schwanke, U.
Schwemmer, S.
Seglar-Arroyo, M.
Senniappan, M.
Seyffert, A. S.
Shafi, N.
Shiningayamwe, K.
Simoni, R.
Sinha, A.
Sol, H.
Specovius, A.
Spencer, S.
Spir-Jacob, M.
Stawarz, Ł.
Steenkamp, R.
Stegmann, C.
Steppa, C.
Takahashi, T.
Tavernier, T.
Taylor, A. M.
Terrier, R.
Tiziani, D.
Tluczykont, M.
Tomankova, L.
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.
Völk, H. J.
Vuillaume, T.
Wadiasingh, Z.
Wagner, S. J.
Watson, J.
Werner, F.
White, R.
Wierzcholska, A.
Yang, R.
Yoneda, H.
Zacharias, M.
Zanin, R.
Zargaryan, D.
Zdziarski, A. A.
Zech, A.
Zhu, S. J.
Zorn, J.
Żywucka, N.
Cerruti, M.
Publication Year :
2020

Abstract

We report on the detection of very-high-energy (VHE; $E > 100$ GeV) $\gamma$-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 multi-wavelength observations with Fermi/LAT, XRT and UVOT on board the Swift satellite, and ATOM. Based on an extrapolation of the Fermi/LAT spectrum towards the VHE $\gamma$-ray regime, we deduce a 95% 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 $0.51 \leq z < 0.98$ and for PKS 1440-389 to $0.14 \lessapprox z < 0.53$.<br />Comment: Accepted for publication in MNRAS. 13 pages, 4 figures

Subjects

Subjects :
Astrophysics - High Energy Astrophysical Phenomena

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2004.03306
Document Type :
Working Paper
Full Text :
https://doi.org/10.1093/mnras/staa999
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