Astrophysical: Active galactic nuclei

  • Publication
    Modeling an accretion disk in NGC 985
    An optically thick relativistic Keplerian accretion disk model is used to fit the broad component of the H-alpha, H-beta, and He I 5876 A emission line profiles...
  • Publication
    Monitoring of active galacitc nuclei. 4: The Seyfert 1 galaxy NGC 4593
    Results of a five-month campaign of optical monitoring the Seyfert 1 galaxy NGC 4593 are presented. High resolution H-alpha and H-Beta spectra and direct images...
  • Publication
    Monitoring of active galactic nuclei. I - The quasars 1302 - 102 and 1217 + 023
    We present the results of a five-month spectroscopic monitoring campaign of two radio loud quasars, PKS 1217 + 023 and PKS 1302 - 102. There is a pronounced...
  • Publication
    Morphology, kinematics and dynamics of bulges of spirals. 1: Kinematics of the bulge of NGC 5055, A MAGN
    Long-slit spectroscopy at four position angles is performed on the spiral NGC 5055. The nuclear region is very bright and massive and the rotation velocity in...
  • Publication
    Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales
    Due to its peculiar and highly variable nature, the blazar 3C 454.3 has been extensively monitored by the WEBT team. Here, we present for the first time these...
  • Publication
    Multimessenger Characterization of Markarian 501 during Historically Low X-Ray and γ-Ray Activity
    We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude of instruments, involving, among...
  • Publication
    Multiwavelength Observations of the Blazar VER J0521+211 during an Elevated TeV Gamma-Ray State
    We report on a long-lasting, elevated gamma-ray flux state from VER J0521+211 observed by VERITAS, MAGIC, and Fermi-LAT in 2013 and 2014. The peak integral flux...
  • Publication
    Near infrared surface photometry of NGC 1068.
    NGC 1068 has been observed at the near infrared bands J, H, K, L. Near infrared scans of NGC 1068 with 20 and 5 arcsec apertures have been used to isolate the...
  • Publication
    NGC 985 - Interactions and the origin of AGNs
    Observations of the Seyfert galaxy NGC 985 have revealed large-scale extended ionized zones, covering a large fraction of the ring-shaped structure of this...