Статья

The beamed jet and quasar core of the distant blazar 4C 71.07

C. M. RaiteriINAF, Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese, ItalyM. VillataINAF, Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese, ItalyM. I. CarnereroINAF, Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese, ItalyJ. A. Acosta‐PulidoDepartamento de Astrofisica, Universidad de La Laguna, La Laguna, E-38205 Tenerife, SpainD. O. MirzaqulovUlugh Beg Astronomical Institute, Maidanak Observatory, Tashkent 100052, UzbekistanV. M. LarionovAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaP. RomanoINAF, Osservatorio Astronomico di Brera, Via Emilio Bianchi 46, I-23807 Merate, LC, ItalyS. VercelloneINAF, Osservatorio Astronomico di Brera, Via Emilio Bianchi 46, I-23807 Merate, LC, ItalyI. AgudoInstituto de Astrofísica de Andalucía (CSIC), E-18080 Granada, SpainA. A. ArkharovPulkovo Observatory, 196140 St Petersburg, RussiaU. BachMax-Planck-Insitut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyR. BachevInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, BG-1784 Sofia, BulgariaS. BaitieriDipartimento di Fisica G. Occhialini, Università degli Studi di Milano Bicocca, I-20126 Milano, ItalyГ. А. БорманCrimean Astrophysical Observatory RAS, P/O Nauchny, 298409, RussiaW. BoschinDepartamento de Astrofisica, Universidad de La Laguna, La Laguna, E-38205 Tenerife, SpainV. BozhilovDepartment of Astronomy, Faculty of Physics, University of Sofia, BG-1164 Sofia, BulgariaM. S. ButuzovaCrimean Astrophysical Observatory RAS, P/O Nauchny, 298409, RussiaP. CalcideseOsservatorio Astronomico della Regione Autonoma Valle d’Aosta, I-11020 Nus, ItalyD. CarosatiEPT Observatories, Tijarafe, E-38780 La Palma, SpainC. CasadioMax-Planck-Insitut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, GermanyW.-P. ChenGraduate Institute of Astronomy, National Central University, Jhongli City, Taoyuan County 32001, TaiwanG. DamljanovićAstronomical Observatory, 11060 Belgrade, SerbiaA. Di PaolaINAF, Osservatorio Astronomico di Roma, I-00040 Monte Porzio Catone, ItalyVictor DoroshenkoSternberg Astronomical Institute, M.V. Lomonosov Moscow State University, Moscow 119991, RussiaН. В. ЕфимоваPulkovo Observatory, 196140 St Petersburg, RussiaSh. A. EhgamberdievUlugh Beg Astronomical Institute, Maidanak Observatory, Tashkent 100052, UzbekistanM. GirolettiINAF, Istituto di Radioastronomia, Via Piero Gobetti 93/2, I-40129 Bologna, ItalyJosé L. GómezInstituto de Astrofísica de Andalucía (CSIC), E-18080 Granada, SpainT. S. GrishinaAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaS. IbryamovDepartment of Physics and Astronomy, Faculty of Natural Sciences, University of Shumen, BG-9700 Shumen, BulgariaHelen JermakAstrophysics Research Institute, Liverpool John Moores University, Liverpool L3 5RF, UKSvetlana G. JorstadAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaG. N. KimeridzeAbastumani Observatory, Mt. Kanobili, 0301 Abastumani, GeorgiaS. A. KlimanovPulkovo Observatory, 196140 St Petersburg, RussiaE. N. KopatskayaAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaO. M. KurtanidzeAbastumani Observatory, Mt. Kanobili, 0301 Abastumani, GeorgiaS. O. KurtanidzeAbastumani Observatory, Mt. Kanobili, 0301 Abastumani, GeorgiaA. LähteenmäkiAalto University Metsähovi Radio Observatory, FI-02540 Kylmälä, FinlandЕ. Г. ЛарионоваAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaA P MarscherInstitute for Astrophysical Research, Boston University, Boston, MA 02215, USAB. MihovInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, BG-1784 Sofia, BulgariaM. MinevDepartment of Astronomy, Faculty of Physics, University of Sofia, BG-1164 Sofia, BulgariaS. N. MolinaInstituto de Astrofísica de Andalucía (CSIC), E-18080 Granada, SpainJ. W. MoodyDepartment of Physics and Astronomy, Brigham Young University, Provo, UT 84602, USAD. A. MorozovaAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaS. V. NazarovCrimean Astrophysical Observatory RAS, P/O Nauchny, 298409, RussiaA. A. NikiforovaAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaM. G. NikolashviliAbastumani Observatory, Mt. Kanobili, 0301 Abastumani, GeorgiaE. OvcharovDepartment of Astronomy, Faculty of Physics, University of Sofia, BG-1164 Sofia, BulgariaS. PenevaInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, BG-1784 Sofia, BulgariaS. RighiniINAF, Istituto di Radioastronomia, Via Piero Gobetti 93/2, I-40129 Bologna, ItalyN. RizziA. C. SadunDepartment of Physics, University of Colorado Denver, CO 80217, USAM. R. SamalGraduate Institute of Astronomy, National Central University, Jhongli City, Taoyuan County 32001, TaiwanС. С. СавченкоAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaE. SemkovInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, BG-1784 Sofia, BulgariaL. A. SiguaAbastumani Observatory, Mt. Kanobili, 0301 Abastumani, GeorgiaL. Slavcheva‐MihovaInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, BG-1784 Sofia, BulgariaI. A. SteeleAstrophysics Research Institute, Liverpool John Moores University, Liverpool L3 5RF, UKA. StrigachevInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, BG-1784 Sofia, BulgariaM. TornikoskiAalto University Metsähovi Radio Observatory, FI-02540 Kylmälä, FinlandYu. V. TroitskayaAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaI. S. TroitskyAstronomical Institute, St Petersburg State University, 198504 St Petersburg, RussiaO. VinceAstronomical Observatory, 11060 Belgrade, Serbia

Monthly Notices of the Royal Astronomical Societyjournal2019en

ABI

Аннотация

ABSTRACT The object 4C 71.07 is a high-redshift blazar whose spectral energy distribution shows a prominent big blue bump and a strong Compton dominance. We present the results of a 2-yr multiwavelength campaign led by the Whole Earth Blazar Telescope (WEBT) to study both the quasar core and the beamed jet of this source. The WEBT data are complemented by ultraviolet and X-ray data from Swift, and by γ-ray data by Fermi. The big blue bump is modelled by using optical and near-infrared mean spectra obtained during the campaign, together with optical and ultraviolet quasar templates. We give prescriptions to correct the source photometry in the various bands for the thermal contribution, in order to derive the non-thermal jet flux. The role of the intergalactic medium absorption is analysed in both the ultraviolet and X-ray bands. We provide opacity values to deabsorb ultraviolet data, and derive a best-guess value for the hydrogen column density of $N_{\rm H}^{\rm best}=6.3 \times 10^{20} \rm \, cm^{-2}$ through the analysis of X-ray spectra. We estimate the disc and jet bolometric luminosities, accretion rate, and black hole mass. Light curves do not show persistent correlations among flux changes at different frequencies. We study the polarimetric behaviour and find no correlation between polarization degree and flux, even when correcting for the dilution effect of the big blue bump. Similarly, wide rotations of the electric vector polarization angle do not seem to be connected with the source activity.

Темы

Astrophysics and Cosmic Phenomena Radio Astronomy Observations and Technology Astrophysical Phenomena and Observations

Идентификаторы

DOI: 10.1093/mnras/stz2264

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