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@ARTICLE{Aharonian:587331,
      author       = {Aharonian, F. and Benkhali, F. Ait and Aschersleben, J. and
                      Ashkar, H. and Backes, M. and Barbosa Martins, V. and
                      Barnard, J. and Batzofin, R. and Becherini, Y. and Berge, D.
                      and Bernlohr, K. and Bi, B. and de Bony de Lavergne, M. and
                      Bottcher, M. and Boisson, C. and Bolmont, J. and Borowska,
                      J. and Bouyahiaoui, M. and Bradascio, F. and Breuhaus, M.
                      and Brose, R. and Brown, A. M. and Brun, F. and Bruno, B.
                      and Bulik, T. and Burger-Scheidlin, C. and Caroff, S. and
                      Casanova, S. and Cecil, R. and Celic, J. and Cerruti, M. and
                      Chand, T. and Chandra, S. and Chen, A. and Chibueze, J. and
                      Chibueze, O. and Cotter, G. and Mbarubucyeye, J. Damascene
                      and Davids, I. D. and Djannati-Ataï, A. and Dmytriiev, A.
                      and Doroshenko, V. and Egberts, K. and Einecke, S. and
                      Ernenwein, J.-P. and Fegan, S. and Fontaine, G. and
                      Fussling, M. and Funk, S. and Gabici, S. and Ghafourizadeh,
                      S. and Giavitto, G. and Glawion, D. and Glicenstein, J. F.
                      and Goswami, P. and Grolleron, G. and Haerer, L. and
                      Hofmann, W. and Holch, T. L. and Holler, M. and Horns, D.
                      and Jamrozy, M. and Jankowsky, F. and Joshi, V. and
                      Jung-Richardt, I. and Kasai, E. and Katarzynski, K. and
                      Khatoon, R. and Khelifi, B. and Kluzniak, W. and Komin, Nu.
                      and Kosack, K. and Kostunin, D. and Lang, R. G. and Le Stum,
                      S. and Leitl, F. and Lemiere, A. and Lenain, J.-P. and
                      Leuschner, F. and Luashvili, A. and Mackey, J. and Marandon,
                      V. and Marchegiani, P. and Martí-Devesa, G. and Marx, R.
                      and Mehta, Abhay and Meyer, M. and Mitchell, A. and
                      Moderski, R. and Mohrmann, L. and Montanari, A. and Moulin,
                      E. and de Naurois, M. and Niemiec, J. and Noel, A. Priyana
                      and O'Brien, P. and Ohm, S. and Olivera-Nieto, L. and de Ona
                      Wilhelmi, E. and Ostrowski, M. and Panny, S. and Panter, M.
                      and Peron, G. and Prokhorov, D. A. and Puhlhofer, G. and
                      Punch, M. and Quirrenbach, A. and Reichherzer, P. and
                      Reimer, A. and Reimer, O. and Ren, H. and Rieger, F. and
                      Rowell, G. and Rudak, B. and Ricarte, H. Rueda and
                      Ruiz-Velasco, E. and Sahakian, V. and Salzmann, H. and
                      Sanchez, D. A. and Santangelo, A. and Sasaki, M. and
                      Schussler, F. and Schutte, H. M. and Schwanke, U. and
                      Shapopi, J. N. S. and Sol, H. and Specovius, A. and Spencer,
                      S. and Stawarz, Ł. and Steenkamp, R. and Steinmassl, S. and
                      Steppa, C. and Sushch, I. and Suzuki, H. and Takahashi, T.
                      and Tanaka, T. and Terrier, R. and Tsuji, N. and van Eldik,
                      C. and van Soelen, B. and Vecchi, M. and Veh, J. and Vink,
                      J. and Wach, T. and Wagner, S. J. and Wierzcholska, A. and
                      Zacharias, M. and Zargaryan, D. and Zdziarski, A. A. and
                      Zech, A. and Zouari, S. and Zywucka, N. and Buckley, D. A.
                      H. and Cooper, J. and Groenewald, D.},
      collaboration = {H. E. S. S.{ Collaboration}},
      title        = {{T}he vanishing of the primary emission region in {PKS}
                      1510-089},
      reportid     = {PUBDB-2023-04251, arXiv:2307.01692},
      year         = {2023},
      note         = {18 pages, 4 figures, 6 tables; accepted for publication in
                      ApJ Letters; corresponding authors: Joleen Barnard, Markus
                      Boettcher, Hester Schutte, Michael Zacharias},
      abstract     = {In July 2021, PKS 1510-089 exhibited a significant flux
                      drop in the high-energy gamma-ray (by a factor 10) and
                      optical (by a factor 5) bands and remained in this low state
                      throughout 2022. Similarly, the optical polarization in the
                      source vanished, resulting in the optical spectrum being
                      fully explained through the steady flux of the accretion
                      disk and the broad-line region. Unlike the aforementioned
                      bands, the very-high-energy gamma-ray and X-ray fluxes did
                      not exhibit a significant flux drop from year to year. This
                      suggests that the steady-state very-high-energy gamma-ray
                      and X-ray fluxes originate from a different emission region
                      than the vanished parts of the high-energy gamma-ray and
                      optical jet fluxes. The latter component has disappeared
                      through either a swing of the jet away from the
                      line-of-sight or a significant drop in the photon production
                      efficiency of the jet close to the black hole. Either change
                      could become visible in high-resolution radio images.},
      cin          = {$Z_GA$ / $Z_HESS$},
      cid          = {$I:(DE-H253)Z_GA-20210408$ / $I:(DE-H253)Z_HESS-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-H253)HESS-20170101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2307.01692},
      howpublished = {arXiv:2307.01692},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2307.01692;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/587331},
}