TeV flaring activity of the AGN PKS 0625-354 in November 2018

Aharonian, F.; Stawarz, Ł.; Hinton, J. A.; Boisson, C.; H. E. S. S. Collaboration; Moulin, E.; de Bony de Lavergne, M.; Khélifi, B.; Leitl, F.; Bradascio, F.; Rieger, F.; Reimer, A.; Olivera-Nieto, L.; Streil, K.; Shapopi, J. N. S.; O'Brien, P.; Marx, R.; Venter, C.; Bolmont, J.; Montanari, A.; Berge, D.; Einecke, S.; Tanaka, T.; Ohm, S.; Klúzniak, W.; Mbarubucyeye, J. Damascene; Kostunin, D.; Sanchez, D. A.; de Ona Wilhelmi, E.; Chibueze, O.; Reichherzer, P.; Böttcher, M.; Sushch, I.; Bruno, B.; Grolleron, G.; Davids, I. D.; Backes, M.; Le Stum, S.; Punch, M.; Giavitto, G.; Holler, M.; Zdziarski, A. A.; Glawion, D.; Prokhorov, D. A.; Wagner, S. J.; Egberts, K.; Ghafourizadeh, S.; Bernlöhr, K.; Steinmassl, S.; Zywucka, N.; Chand, T.; Bulik, T.; Cotter, G.; Rudak, B.; Haerer, L.; Aschersleben, J.; Meyer, M.; Djuvsland, J.; Kasai, E.; Brose, R.; Reimer, O.; Holch, T. L.; Quirrenbach, A.; Takahashi, T.; Mitchell, A.; Sol, H.; Schutte, H. M.; Veh, J.; Katarzynski, K.; Funk, S.; Burger-Scheidlin, C.; Pita, S.; Bi, B.; Jung-Richardt, I.; Steenkamp, R.; Salzmann, H.; Dmytriiev, A.; Zargaryan, D.; de Naurois, M.; Parsons, R. D.; Moderski, R.; Chen, A.; Doroshenko, V.; Casanova, S.; Ashkar, H.; Celic, J.; Mackey, J.; Zouari, S.; Ren, H.; Joshi, V.; Cecil, R.; Pühlhofer, G.; Panny, S.; Niemiec, J.; Ostrowski, M.; Sasaki, M.; Caroff, S.; Brun, F.; Leuschner, F.; Komin, Nu.; Chandra, S.; Baktash, A.; Zech, A.; Batzofin, R.; Jamrozy, M.; van Eldik, C.; Mehta, Abhay; Jankowsky, F.; Fontaine, G.; Chibueze, J.; Horns, D.; Ait Benkhali, F.; Ernenwein, J.-P.; Füßling, M.; Lenain, J.-P.; Bylund, T.; Kosack, K.; Borowska, J.; Barnard, J.; Breuhaus, M.; Suzuki, H.; Brown, A.; Wierzcholska, A.; Becherini, Y.; Vecchi, M.; Gabici, S.; Glicenstein, J. F.; Specovius, A.; Lang, R. G.; Lemière, A.; Cerruti, M.; Schüssler, F.; Luashvili, A.; Spencer, S.; Zacharias, M.; Goswami, P.; Sahakian, V.; Khatoon, R.; Glombitza, J.; Martins, V. Barbosa

Preprint

PUBDB-2024-00633

TeV flaring activity of the AGN PKS 0625-354 in November 2018

Aharonian, F. ; Ait Benkhali, F. ; Aschersleben, J. ; Ashkar, H. ; Backes, M. ; Baktash, A. ; Martins, V. B.Extern*DESY* ; Barnard, J. ; Batzofin, R. ; Becherini, Y. ; Berge, D.DESY* ; Bernlöhr, K. ; Bi, B. ; Böttcher, M. ; Boisson, C. ; Bolmont, J. ; de Bony de Lavergne, M. ; Borowska, J. ; Bradascio, F. ; Breuhaus, M. ; Brose, R. ; Brown, A. ; Brun, F. ; Bruno, B. ; Bulik, T. ; Burger-Scheidlin, C. ; Bylund, T. ; Caroff, S. ; Casanova, S. ; Cecil, R. ; Celic, J. ; Cerruti, M. ; Chand, T. ; Chandra, S. ; Chen, A. ; Chibueze, J. ; Chibueze, O. ; Cotter, G. ; Mbarubucyeye, J. D.DESY* ; Davids, I. D. ; Djuvsland, J. ; Dmytriiev, A. ; Doroshenko, V. ; Egberts, K. ; Einecke, S. ; Ernenwein, J.-P. ; Fontaine, G. ; Füßling, M.Extern* ; Funk, S. ; Gabici, S. ; Ghafourizadeh, S. ; Giavitto, G.DESY* ; Glawion, D. ; Glicenstein, J. F. ; Glombitza, J. ; Goswami, P. ; Grolleron, G. ; Haerer, L. ; Hinton, J. A. ; Holch, T. L.DESY* ; Holler, M. ; Horns, D. ; Jamrozy, M. ; Jankowsky, F. ; Joshi, V. ; Jung-Richardt, I. ; Kasai, E. ; Katarzynski, K. ; Khatoon, R. ; Khélifi, B. ; Klúzniak, W. ; Komin, N. ; Kosack, K. ; Kostunin, D.DESY* ; Lang, R. G. ; Le Stum, S. ; Leitl, F. ; Lemière, A. ; Lenain, J.-P. ; Leuschner, F. ; Luashvili, A. ; Mackey, J. ; Marx, R. ; Mehta, A.DESY* ; Meyer, M. ; Mitchell, A. ; Moderski, R. ; Montanari, A. ; Moulin, E. ; de Naurois, M. ; Niemiec, J. ; O'Brien, P. ; Ohm, S.DESY* ; Olivera-Nieto, L. ; de Ona Wilhelmi, E.DESY* ; Ostrowski, M. ; Panny, S. ; Parsons, R. D. ; Pita, S. ; Prokhorov, D. A. ; Pühlhofer, G. ; Punch, M. ; Quirrenbach, A. ; Reichherzer, P. ; Reimer, A. ; Reimer, O. ; Ren, H. ; Rieger, F. ; Rudak, B. ; Sahakian, V. ; Salzmann, H. ; Sanchez, D. A. ; Sasaki, M. ; Schüssler, F. ; Schutte, H. M. ; Shapopi, J. N. S. ; Sol, H. ; Specovius, A. ; Spencer, S. ; Stawarz, Ł. ; Steenkamp, R. ; Steinmassl, S. ; Streil, K. ; Sushch, I. ; Suzuki, H. ; Takahashi, T. ; Tanaka, T. ; van Eldik, C. ; Vecchi, M. ; Veh, J. ; Venter, C. ; Wagner, S. J. ; Wierzcholska, A. (Corresponding author)Extern* ; Zacharias, M. ; Zargaryan, D. ; Zdziarski, A. A. ; Zech, A. ; Zouari, S. ; Zywucka, N. ; H. E. S. S. Collaboration (Collaboration author)

2024

This record in other databases:

Report No.: arXiv:2401.07071

Abstract: Most $\gamma$-ray detected active galactic nuclei are blazars with one of their relativistic jets pointing towards the Earth. Only a few objects belong to the class of radio galaxies or misaligned blazars. Here, we investigate the nature of the object PKS 0625-354, its $\gamma$-ray flux and spectral variability and its broad-band spectral emission with observations from H.E.S.S., Fermi-LAT, Swift-XRT, and UVOT taken in November 2018. The H.E.S.S. light curve above 200 GeV shows an outburst in the first night of observations followed by a declining flux with a halving time scale of 5.9h. The $\gamma\gamma$-opacity constrains the upper limit of the angle between the jet and the line of sight to $\sim10^\circ$. The broad-band spectral energy distribution shows two humps and can be well fitted with a single-zone synchrotron self Compton emission model. We conclude that PKS 0625-354, as an object showing clear features of both blazars and radio galaxies, can be classified as an intermediate active galactic nuclei. Multi-wavelength studies of such intermediate objects exhibiting features of both blazars and radio galaxies are sparse but crucial for the understanding of the broad-band emission of $\gamma$-ray detected active galactic nuclei in general.

Keyword(s): galaxy, radio wave ; jet, relativistic ; emission, model ; AGN ; blazar ; spectral ; flux ; HESS ; GeV ; variability ; spectral energy distribution ; GLAST ; synchrotron ; TeV