J/other/AstBu/79.548 Radio measurements of PKS 1614+051 (Sotnikova+, 2024) ================================================================================ Radio and Optical Properties of the Blazar PKS 1614+051 at z = 3.21. Sotnikova Yu.V., Mikhailov A.G., Volvach A.E., Kudryavtsev D.O., Mufakharov T.V., Vlasyuk V.V., Khabibullina M.L., Kudryashova A.A., Mingaliev M.G., Erkenov A.K., Kovalev Yu.A., Kovalev Y.Y., Kharinov M.A., Semenova T.A., Udovitskiy R.Yu., Bursov N.N., Trushkin S.A., Spiridonova O.I., Popkov A.V., Tsybulev P.G., Volvach L.N., Nizhelsky N.A., Zhekanis G.V., Iuzhanina K.V. =2024AstBu..79..546S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: QSOs ; Active gal. nuclei ; Photometry ; Radio continuum ; Optical Keywords: galaxies: active - galaxies: high-redshift - blazars: individual: PKS 1614+051 - radio continuum: quasars Abstract: We present a study of the radio and optical properties of the high-frequency peaker (HFP) blazar PKS 1614+051 at z=3.21 based on the data covering the time period of 1997-2024. The radio data are represented by the almost instantaneous 1-22GHz measurements from the SAO RAS RATAN-600 radio telescope, the 5 and 8GHz data from the IAA RAS RT-32 telescopes, and the 37GHz data from the RT-22 telescope of CrAO RAS. The optical measurements in the R band were collected with the SAO RAS 1-m Zeiss-1000 and 0.5-m AS-500/2 telescopes, and the ZTF archive data. We have found low overall variability indices (0.1-0.2) and a median spectral peak at 4.6GHz, which is stable during the long-term period of monitoring. An analysis of the radio light curves reveals significant time delays (0.6 to 6.4 yrs) between the radio frequencies along with variability timescales ranging from 0.2 to 1.8 yrs in the source's rest frame, which is similar to the blazars at lower redshifts. Spectral modeling suggests the presence of both synchrotron self-absorption (SSA) and free-free absorption (FFA) processes. Based on the SSA model, we provide estimates of the magnetic field strength which peaks at approximately 100mG. A spectroscopic study with the BTA SCORPIO-1 spectrograph has found evidence of the regular motion of a neutral hydrogen envelope around the blazar center, which confirms the presence of enough gaseous matter to form an external FFA screen. The results highlight the importance of multi-wavelength and long-term monitoring to understand the physical mechanisms driving the variability in high-redshift blazars. Description: We present the multi-frequency flux density measurements for the blazar PKS 1614+051 obtained at the RATAN-600 radio telescope (1, 2, 5, 8, 11, 22 GHz) of the SAO RAS, the RT-32 radio telescope of the IAA RAS (37 GHz), and the RT-22 radio telescope of the CrAO RAS (5 and 8 GHz). Tables are numerated as in the publication. Objects: --------------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------------- 16 16 37.56 +04 59 32.74 PKS 1614+051 = QSO B1614+051 --------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table4.dat 148 119 PKS 1614+051 flux densities at 1-22GHz table5.dat 38 337 PKS 1614+051 flux densities at 5GHz table6.dat 44 179 PKS 1614+051 flux densities at 37GHz -------------------------------------------------------------------------------- See also: J/A+A/544/A25 : GPS radio sources multifrequency study (Mingaliev+, 2012) J/other/AstBu/74.348 : 164 GHz-peaked spectrum sources (Sotnikova+, 2019) J/MNRAS/508/2798 : Sample of 102 distant quasars (Sotnikova+, 2021) Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 "date" Date Observing date in a format YYYY.MM.DD 11 A1 --- n_Date [*] Note on Date (1) 14- 20 F7.2 yr Year Observing date in a format YYYY.YY 26- 29 F4.2 Jy S22 ?=- Flux density at 22GHz 36- 39 F4.2 Jy e_S22 ?=- Mean error of flux density at 22GHz 45- 48 F4.2 Jy S11 ?=- Flux density at 11GHz 55- 58 F4.2 Jy e_S11 ?=- Mean error of flux density at 11GHz 64- 67 F4.2 Jy S8 ?=- Flux density at 8GHz 74- 77 F4.2 Jy e_S8 ?=- Mean error of flux density at 8GHz 83- 86 F4.2 Jy S5 ?=- Flux density at 5GHz 93- 96 F4.2 Jy e_S5 ?=- Mean error of flux density at 5GHz 102-105 F4.2 Jy S2 ?=- Flux density at 2GHz 111-115 F5.2 Jy e_S2 ?=- Mean error of flux density at 2GHz 121-124 F4.2 Jy S1 ?=- Flux density at 1GHz 131-134 F4.2 Jy e_S1 ?=- Mean error of flux density at 1GHz 140-148 A9 -- Inst Observing telescope (RATAN-600 or RT-32) -------------------------------------------------------------------------------- Note (1): Asterisk corresponds to the data previously published in Mingaliev et al., 2012A&A...544A..25M, Cat. J/A+A/544/A25, Sotnikova et al., 2019AstBu..74..348S, Cat. J/other/AstBu/74.348, Sotnikova et al., 2021MNRAS.508.2798S, Cat. J/MNRAS/508/2798. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 "date" Date Observing date in a format YYYY.MM.DD 14- 20 F7.2 yr Year Observing date in a format YYYY.YY 26- 29 F4.2 Jy S5 Flux density at 5GHz 35- 38 F4.2 Jy e_S5 Measurement error of flux density at 5GHz -------------------------------------------------------------------------------- Byte-by-byte Description of file: table6.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 "date" Date Observing date in a format YYYY.MM.DD 16- 22 F7.2 yr Year Observing date in a format YYYY.YY 28- 31 F4.2 Jy S37 Flux density at 37GHz 41- 44 F4.2 Jy e_S37 Measurement error of flux density at 37GHz -------------------------------------------------------------------------------- Acknowledgements: Timur Mufakharov, timur.mufakharov(at)gmail.com ================================================================================ (End) Patricia Vannier [CDS] 28-Jan-2025