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Title: The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays

Abstract

Here, the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes observed S2 0109+22 in 2015 July during its flaring activity in high-energy gamma-rays observed by Fermi-Large Area Telescope. We analyse the MAGIC data to characterize the very high energy (VHE) gamma-ray emission of S2 0109+22, which belongs to the subclass of intermediate synchrotron peak (ISP) BL Lacertae (BL Lac) objects. We study the multifrequency emission in order to investigate the source classification. Finally, we compare the source long-term behaviour to other VHE gamma-ray emitting (TeV) blazars. We performed a temporal and spectral analysis of the data centred around the MAGIC interval of observation (MJD 57225–57231). Long-term radio and optical data have also been investigated using the discrete correlation function. The redshift of the source is estimated through optical host-galaxy imaging and also using the amount of VHE gamma-ray absorption. The quasi-simultaneous multifrequency spectral energy distribution (SED) is modelled with the conventional one-zone synchrotron self-Compton (SSC) model. MAGIC observations resulted in the detection of the source at a significance level of 5.3σ. The VHE gamma-ray emission of S2 0109+22 is variable on a daily time scale. VHE gamma-ray luminosity of the source is lower than the average of TeV BL Lacs. Themore » optical polarization and long-term optical/radio behaviour of the source are different from the general population of TeV blazars. All these findings agree with the classification of the source as an ISP BL Lac object. As a result, we estimate the source redshift as z = 0.36 ± 0.07. The SSC parameters describing the SED are rather typical for blazars.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [12];  [4];  [13];  [7];  [14];  [2];  [15];  [16];  [17] more »;  [18];  [7];  [6];  [16];  [7];  [10];  [9];  [16];  [2];  [16];  [2];  [17];  [2];  [3];  [19];  [20];  [20];  [3];  [9];  [5];  [21];  [3];  [4];  [4]; ORCiD logo [22];  [4];  [3];  [2];  [9];  [3];  [9];  [23];  [7];  [2];  [10];  [14];  [23];  [2];  [5];  [16];  [24];  [7];  [16];  [24];  [10];  [9];  [5];  [24];  [7];  [24];  [24];  [24];  [24];  [2];  [5];  [2];  [22];  [2];  [13];  [9];  [23];  [6];  [25];  [25];  [10];  [21];  [2];  [3];  [16];  [24];  [26];  [4];  [25];  [17];  [7];  [16];  [23];  [16];  [22];  [11];  [9];  [14];  [22];  [16];  [24];  [24];  [16];  [3];  [16];  [7];  [17];  [27];  [14];  [9];  [19];  [28];  [4];  [18];  [3];  [5];  [7];  [4];  [27];  [16];  [2];  [17];  [9];  [24];  [14];  [7];  [11];  [5];  [11];  [2];  [7];  [5];  [2];  [25];  [5];  [26];  [27];  [24];  [10];  [10];  [7];  [16];  [7];  [5];  [29];  [30];  [31];  [31];  [31];  [31];  [31];  [32];  [31];  [33];  [34];  [34];  [35];  [36];  [37];  [36] « less
  1. Università di Udine, and INFN Trieste, I-33100 Udine, Italy; Japanese MAGIC Consortium: ICRR, The University of Tokyo, 277-8582 Chiba, Japan, Department of Physics, Kyoto University, 606-8502 Kyoto, Japan, Tokai University, 259-1292 Kanagawa, Japan, RIKEN, 351-0198 Saitama, Japan
  2. National Institute for Astrophysics (INAF), I-00136 Rome, Italy
  3. Università di Padova and INFN, I-35131 Padova, Italy
  4. Technische Universität Dortmund, D-44221 Dortmund, Germany
  5. Croatian MAGIC Consortium: University of Rijeka, 51000 Rijeka, University of Split – FESB, 21000 Split, University of Zagreb – FER, 10000 Zagreb, University of Osijek, 31000 Osijek, and Rudjer Boskovic Institute, 10000 Zagreb, Croatia
  6. Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Salt Lake, Sector-1, Kolkata 700064, India
  7. Max-Planck-Institut für Physik, D-80805 München, Germany
  8. Max-Planck-Institut für Physik, D-80805 München, Germany; now at Centro Brasileiro de Pesquisas Físicas (CBPF), 22290-180 URCA, Rio de Janeiro (RJ), Brazil
  9. Unidad de Partículas y Cosmología (UPARCOS), Universidad Complutense, E-28040 Madrid, Spain
  10. Inst. de Astrofísica de Canarias, E-38200 La Laguna, and Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain
  11. Department of Astrophysics, University of Łódź, PL-90236 Łódź, Poland
  12. Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany; Institut für Physik, Humboldt University of Berlin, D-12489 Berlin, Germany
  13. Università di Udine, and INFN Trieste, I-33100 Udine, Italy; also at Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy
  14. Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany
  15. ETH Zurich, CH-8093 Zurich, Switzerland
  16. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), E-08193 Bellaterra (Barcelona), Spain
  17. Università di Siena and INFN Pisa, I-53100 Siena, Italy
  18. Università di Pisa, and INFN Pisa, I-56126 Pisa, Italy
  19. Università di Udine, and INFN Trieste, I-33100 Udine, Italy
  20. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), E-08193 Bellaterra (Barcelona), Spain; also at Port d’Informació Científica (PIC), E-08193 Bellaterra (Barcelona), Spain
  21. Universität Würzburg, D-97074 Würzburg, Germany
  22. Finnish MAGIC Consortium: Tuorla Observatory (Department of Physics and Astronomy) and Finnish Centre of Astronomy with ESO (FINCA), University of Turku, FIN-20014 Turku, Finland, Astronomy Division, University of Oulu, FIN-90014 Oulu, Finland
  23. Departament de Física, and CERES-IEEC, Universitat Autónoma de Barcelona, E-08193 Bellaterra, Spain
  24. Japanese MAGIC Consortium: ICRR, The University of Tokyo, 277-8582 Chiba, Japan, Department of Physics, Kyoto University, 606-8502 Kyoto, Japan, Tokai University, 259-1292 Kanagawa, Japan, RIKEN, 351-0198 Saitama, Japan
  25. Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784 Sofia, Bulgaria
  26. Japanese MAGIC Consortium: ICRR, The University of Tokyo, 277-8582 Chiba, Japan, Department of Physics, Kyoto University, 606-8502 Kyoto, Japan, Tokai University, 259-1292 Kanagawa, Japan, RIKEN, 351-0198 Saitama, Japan; Max-Planck-Institut für Physik, D-80805 München, Germany
  27. Universitat de Barcelona, ICC, IEEC-UB, E-08028 Barcelona, Spain
  28. Università di Udine, and INFN Trieste, I-33100 Udine, Italy; INAF-Trieste and Department of Physics and Astronomy, University of Bologna, 40126 Bologna, Italy
  29. (Fermi-LAT Collaboration), S. [Agenzia Spaziale Italiana (ASI), Space Science Data Center, I-00133 Roma, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia, I-06123 Perugia, Italy
  30. (Fermi-LAT Collaboration), R. [Università di Udine, and INFN Trieste, I-33100 Udine, Italy
  31. Tuorla Observatory, Department of Physics and Astronomy, University of Turku, FIN-20014 Turku, Finland
  32. Astrophysical Sciences Division, BARC, Mumbai-400085, India
  33. Metsähovi Radio Observatory, Aalto University, Metsähovintie 114, FI-02540 Kylmälä, Finland; Department of Electronics and Nanoengineering, Aalto University, PO Box 15500, FI-00076 Aalto, Finland; Tartu Observatory, Observatooriumi 1, 61602 Tõravere, Estonia
  34. Metsähovi Radio Observatory, Aalto University, Metsähovintie 114, FI-02540 Kylmälä, Finland
  35. Metsähovi Radio Observatory, Aalto University, Metsähovintie 114, FI-02540 Kylmälä, Finland; Department of Electronics and Nanoengineering, Aalto University, PO Box 15500, FI-00076 Aalto, Finland
  36. Owens Valley Radio Observatory, California Institute of Technology, Pasadena, CA 91125, USA
  37. Departmento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
MAGIC Collaboration
OSTI Identifier:
1475024
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 480; Journal Issue: 1; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: active; BL Lacertae objects: individual: S2 0109+22; galaxies: jets; gamma-rays: galaxies

Citation Formats

Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berse, R. Ch, Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Konno, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Pfrang, K., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Ciprini , Desiante , Barcewicz, S., Hovatta, T., Jormanainen, J., Takalo, L., Reinthal, R., Mankuzhiyil, N., Wierda, F., Lähteenmäki, A., Tammi, J., Tornikoski, M., Vera, R. J. C., Kiehlmann, S., Max-Moerbeck, W., and Readhead, A. C. S. The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays. United States: N. p., 2018. Web. doi:10.1093/mnras/sty1753.
Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berse, R. Ch, Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Konno, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Pfrang, K., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Ciprini , Desiante , Barcewicz, S., Hovatta, T., Jormanainen, J., Takalo, L., Reinthal, R., Mankuzhiyil, N., Wierda, F., Lähteenmäki, A., Tammi, J., Tornikoski, M., Vera, R. J. C., Kiehlmann, S., Max-Moerbeck, W., & Readhead, A. C. S. The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays. United States. doi:10.1093/mnras/sty1753.
Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berse, R. Ch, Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Konno, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Pfrang, K., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Ciprini , Desiante , Barcewicz, S., Hovatta, T., Jormanainen, J., Takalo, L., Reinthal, R., Mankuzhiyil, N., Wierda, F., Lähteenmäki, A., Tammi, J., Tornikoski, M., Vera, R. J. C., Kiehlmann, S., Max-Moerbeck, W., and Readhead, A. C. S. Thu . "The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays". United States. doi:10.1093/mnras/sty1753. https://www.osti.gov/servlets/purl/1475024.
@article{osti_1475024,
title = {The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays},
author = {Ansoldi, S. and Antonelli, L. A. and Arcaro, C. and Baack, D. and Babić, A. and Banerjee, B. and Bangale, P. and Barres de Almeida, U. and Barrio, J. A. and Becerra González, J. and Bednarek, W. and Bernardini, E. and Berse, R. Ch and Berti, A. and Besenrieder, J. and Bhattacharyya, W. and Bigongiari, C. and Biland, A. and Blanch, O. and Bonnoli, G. and Carosi, R. and Ceribella, G. and Chatterjee, A. and Colak, S. M. and Colin, P. and Colombo, E. and Contreras, J. L. and Cortina, J. and Covino, S. and Cumani, P. and D’Elia, V. and Da Vela, P. and Dazzi, F. and De Angelis, A. and De Lotto, B. and Delfino, M. and Delgado, J. and Di Pierro, F. and Domínguez, A. and Dominis Prester, D. and Dorner, D. and Doro, M. and Einecke, S. and Elsaesser, D. and Fallah Ramazani, V. and Fattorini, A. and Fernández-Barral, A. and Ferrara, G. and Fidalgo, D. and Foffano, L. and Fonseca, M. V. and Font, L. and Fruck, C. and Gallozzi, S. and García López, R. J. and Garczarczyk, M. and Gaug, M. and Giammaria, P. and Godinović, N. and Guberman, D. and Hadasch, D. and Hahn, A. and Hassan, T. and Hayashida, M. and Herrera, J. and Hoang, J. and Hrupec, D. and Inoue, S. and Ishio, K. and Iwamura, Y. and Konno, Y. and Kubo, H. and Kushida, J. and Lamastra, A. and Lelas, D. and Leone, F. and Lindfors, E. and Lombardi, S. and Longo, F. and López, M. and Maggio, C. and Majumdar, P. and Makariev, M. and Maneva, G. and Manganaro, M. and Mannheim, K. and Maraschi, L. and Mariotti, M. and Martínez, M. and Masuda, S. and Mazin, D. and Mielke, K. and Minev, M. and Miranda, J. M. and Mirzoyan, R. and Moralejo, A. and Moreno, V. and Moretti, E. and Neustroev, V. and Niedzwiecki, A. and Nievas Rosillo, M. and Nigro, C. and Nilsson, K. and Ninci, D. and Nishijima, K. and Noda, K. and Nogués, L. and Paiano, S. and Palacio, J. and Paneque, D. and Paoletti, R. and Paredes, J. M. and Pedaletti, G. and Peñil, P. and Peresano, M. and Persic, M. and Pfrang, K. and Prada Moroni, P. G. and Prandini, E. and Puljak, I. and Garcia, J. R. and Rhode, W. and Ribó, M. and Rico, J. and Righi, C. and Rugliancich, A. and Saha, L. and Saito, T. and Satalecka, K. and Schweizer, T. and Sitarek, J. and Šnidarić, I. and Sobczynska, D. and Stamerra, A. and Strzys, M. and Surić, T. and Tavecchio, F. and Temnikov, P. and Terzić, T. and Teshima, M. and Torres-Albà, N. and Tsujimoto, S. and Vanzo, G. and Vazquez Acosta, M. and Vovk, I. and Ward, J. E. and Will, M. and Zarić, D. and Ciprini  and Desiante  and Barcewicz, S. and Hovatta, T. and Jormanainen, J. and Takalo, L. and Reinthal, R. and Mankuzhiyil, N. and Wierda, F. and Lähteenmäki, A. and Tammi, J. and Tornikoski, M. and Vera, R. J. C. and Kiehlmann, S. and Max-Moerbeck, W. and Readhead, A. C. S.},
abstractNote = {Here, the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes observed S2 0109+22 in 2015 July during its flaring activity in high-energy gamma-rays observed by Fermi-Large Area Telescope. We analyse the MAGIC data to characterize the very high energy (VHE) gamma-ray emission of S2 0109+22, which belongs to the subclass of intermediate synchrotron peak (ISP) BL Lacertae (BL Lac) objects. We study the multifrequency emission in order to investigate the source classification. Finally, we compare the source long-term behaviour to other VHE gamma-ray emitting (TeV) blazars. We performed a temporal and spectral analysis of the data centred around the MAGIC interval of observation (MJD 57225–57231). Long-term radio and optical data have also been investigated using the discrete correlation function. The redshift of the source is estimated through optical host-galaxy imaging and also using the amount of VHE gamma-ray absorption. The quasi-simultaneous multifrequency spectral energy distribution (SED) is modelled with the conventional one-zone synchrotron self-Compton (SSC) model. MAGIC observations resulted in the detection of the source at a significance level of 5.3σ. The VHE gamma-ray emission of S2 0109+22 is variable on a daily time scale. VHE gamma-ray luminosity of the source is lower than the average of TeV BL Lacs. The optical polarization and long-term optical/radio behaviour of the source are different from the general population of TeV blazars. All these findings agree with the classification of the source as an ISP BL Lac object. As a result, we estimate the source redshift as z = 0.36 ± 0.07. The SSC parameters describing the SED are rather typical for blazars.},
doi = {10.1093/mnras/sty1753},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 480,
place = {United States},
year = {2018},
month = {7}
}

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