Browsing by Author "Mingaliev M."

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  • 37 GHz observations of narrow-line Seyfert 1 galaxies 
    Lähteenmäki A.; Järvelä E.; Hovatta T.; Tornikoski M.; Harrison D.; López-Caniego M.; Max-Moerbeck W.; Mingaliev M.; Pearson T.; Ramakrishnan V.; Readhead A.; Reeves R.; Richards J.; Sotnikova Y.; Tammi J. (2017)
    © ESO 2017. Observations performed at Metsähovi Radio Observatory at 37 GHz are presented for a sample of 78 radio-loud and radio-quiet narrow-line Seyfert 1 (NLS1) galaxies, together with additional lower and higher ...
  • A study of the synchrotron component in the blazar spectral energy distributions 
    Mingaliev M.; Sotnikova Y.; Mufakharov T.; Erkenov A.; Udovitskiy R. (2015)
    © Pleiades Publishing, Ltd., 2015. We study the synchrotron component of nonthermal radiation of blazars using the spectral energy distribution (SED). The sample contains a total of 877 blazars, including 423 flat-spectrum ...
  • Automated system for reduction of observational data on RATAN-600 radio telescope 
    Udovitskiy R.; Sotnikova Y.; Mingaliev M.; Tsybulev P.; Zhekanis G.; Nizhelskij N. (2016)
    © 2016, Pleiades Publishing, Ltd.We present the automated systemfor estimating the parameters of radio sources observed on all available continuum radiometers (two receiving facilities of secondary mirrors No. 1 and No. 2 ...
  • Circumzenithal sky region survey at the frequency of 30 GHz with 32-element radiometer matrix of the RATAN-600 
    Parijskij Y.; Bursov N.; Berlin A.; Mingaliev M.; Nizhelskij N.; Stolyarov V.; Tsybulev P.; Semenova T.; Khaikin V.; Grechkin A. (2013)
    We report the preliminary results of a deep sky survey in the field of 00h < RA < 24h, 40.° 5 < 42.°5 with the RATAN-600 and its new focal 32-feed receiver matrix at the limiting radio frequency of 30 GHz, with the resolution ...
  • Flux density variability of radio sources at declinations 10°-12°30′ (J2000) on time scales less than a month 
    Gorshkov A.; Konnikova V.; Mingaliev M. (2013)
    Results of a search for and study of variability in a complete sample of flat-spectrum radio sources (83 objects) on time scales longer than a day are reported. The data were obtained in six series of daily observations ...
  • Flux-density measurements of the high-redshift blazar PSO J047.4478+27.2992 at 4.7 and 8.2 GHz with RATAN-600 
    Mufakharov T.; Mikhailov A.; Sotnikova Y.; Mingaliev M.; Stolyarov V.; Erkenov A.; Nizhelskij N.; Tsybulev P. (2021)
    We report the first detection at 4.7 and 8.2 GHz with the RATAN-600 radio telescope of the source PSO J047.4478+27.2992, which has been announced as a blazar at z = 6.1. The average flux densities are 12 ± 3 and 8 ± 4 mJy ...
  • Flux-density variability of the blazar S5 1803+784 (J1800+7828) on a timescale of a month 
    Gorshkov A.; Konnikova V.; Mingaliev M.; Erkenov A. (2013)
    The variability of the blazar S5 1803+784 (J1800+7828) on a timescale of a month is analyzed using daily RATAN-600 observations in 2009 (a total of 154 observations) at five frequences from 2.3 to 21.7 GHz. Cyclic variability ...
  • Gigahertz-peaked spectrum (GPS) galaxies and quasars 
    Mingaliev M.; Sotnikova Y.; Mufakharov T.; Erkenov A.; Udovitskiy R. (2013)
    The results of a comprehensive analysis of continuous radio spectra of a sample of Gigahertz-Peaked Spectrum (GPS) sources are reported. The sources are selected from a flux-density-complete sample (S ν ≥ 200 mJy at 4.8 ...
  • High-redshift quasars at z ≥ 3 - I. Radio spectra 
    Sotnikova Y.; Mikhailov A.; Mufakharov T.; Mingaliev M.; Bursov N.; Semenova T.; Stolyarov V.; Udovitskiy R.; Kudryashova A.; Erkenov A. (2021)
    We present the radio properties of optically selected quasars with z ≥ 3. The complete sample consists of 102 quasars with a flux density level S1.4 ≥ 100 mJy in a declination range -35° ≤ Dec. ≤ +49°. The observations ...
  • Long-term and rapid variability of the radio source J1603+1105 
    Konnikova V.; Mingaliev M.; Erkenov A. (2017)
    © 2017, Pleiades Publishing, Ltd. We present the long-term light curve of the radio source J1603+1105 and results of the study of its variability on timescales from several days to several weeks. From 2007, a flare with ...
  • Long-term variability of a complete sample of flat-spectrum radio sources at declinations 10°-12°30′ (J2000) 
    Gorshkov A.; Konnikova V.; Mingaliev M. (2012)
    The paper reports the results of ten-year centimeter-wavelength observations with the RATAN-600 radio telescope of a complete sample of 83 flat-spectrum sources from the GB6 catalog of the MGB Survey, with S 4.85 < 200 mJy ...
  • Long-term variability of the radio source J0010+1058 in 2000–2013 
    Gorshkov A.; Konnikova V.; Mingaliev M.; Kratov D. (2015)
    © 2015, Pleiades Publishing, Ltd. During thirteen-year monitoring of the source J0010+1058, four bursts have been observed with an amplitude greater than 1 Jy on a frequency of 21.7 GHz. Using autocorrelation functions, ...
  • MARS-3 matrix radiometric system for RATAN-600 
    Berlin A.; Parijskij Y.; Nizhelskij N.; Mingaliev M.; Tsybulev P.; Kratov D.; Udovitskiy R.; Smirnov V.; Pylypenko O. (2012)
    The MARS-3 third-generation matrix radiometric system has been developed, manufactured, and is currently being used in observations within the framework of the "Cosmological Gene" program. The system is based on new hardware ...
  • Multifrequency quasi-simultaneous observations of six low-synchrotron peaked blazars 
    Mufakharov T.; Sotnikova Y.; Mingaliev M.; Erkenov A. (2015)
    © Pleiades Publishing, Ltd., 2015. We made an estimation of the synchrotron peak frequency (ν<sup>s</sup><inf>peak</inf>) of the spectral energy distribution (SED) for six blazars. These objects were selected as ...
  • Multifrequency Study of GHz-peaked Spectrum Sources 
    Sotnikova Y.; Mufakharov T.; Majorova E.; Mingaliev M.; Udovitskii R.; Bursov N.; Semenova T. (2019)
    © 2019, Pleiades Publishing, Ltd. Gigahertz-Peaked spectrum (GPS) sources are compact active galactic nuclei, presumably young precursors of bright radio sources. The study of GPS radio properties provides information about ...
  • Multifrequency study of GHz-peaked spectrum sources and candidates with the RATAN-600 radio telescope 
    Mingaliev M.; Sotnikova Y.; Torniainen I.; Tornikoski M.; Udovitskiy R. (2012)
    Context. Gigahertz peaked spectrum (GPS) radio sources are a class of extragalactic radio sources characterized by a spectral peak in the gigahertz domain. They are a mixed class of quasars and galaxies. A large proportion ...
  • Multifrequency study of gigahertz-peaked spectrum sources with RATAN-600 
    Sotnikova Y.; Mufakharov T.; Mingaliev M.; Mikhailov A. (2021)
    We report the radio continuum properties for several samples of peaked spectrum (PS) radio sources. Broadband spectra of the objects were analyzed using the RATAN-600 six-frequency (1.2–22 GHz) observations and available ...
  • Radio flux variations of the quasar J1159+2914 (S5 1156+295) in 2010–2013 
    Gorshkov A.; Ipatov A.; Konnikova V.; Mardyshkin V.; Mingaliev M.; Kharinov M. (2014)
    © 2014, Pleiades Publishing, Ltd. Results of the observations of the blazar J1159+2914 (S1156+295) in 2010–2013 are reported. The observations were carried out on the RATAN-600 radio telescope (Special Astrophysical ...
  • RATAN-600 multi-frequency data for the BL Lacertae objects 
    Mingaliev M.; Sotnikova Y.; Udovitskiy R.; Mufakharov T.; Nieppola E.; Erkenov A. (2014)
    © ESO, 2014. Aims. We present a new catalogue of the RATAN-600 multi-frequency measurements for BL Lac objects. The purpose of this catalogue is to compile the BL Lac multi-frequency data that is acquired with the RATAN-600 ...
  • Short variability of the radio flux density from the blazar J0530+1331 
    Gorshkov A.; Ipatov A.; Ipatova I.; Konnikova V.; Mardyshkin V.; Mingaliev M.; Kharinov M.; Evstigneev A. (2016)
    © 2016, Pleiades Publishing, Inc.The results of observations of the quasar J0530+1331 (B0528+134) with the radio telescopes RATAN-600 at frequencies of 4.6, 8.2, 11.2, 21.7 GHz and RT-32 at the Zelenchukskaya and Badary ...

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