229 datasets found

Keywords: seyfert galaxies

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  • AGNs with composite spectra. II.

    We have compiled from the literature 88 emission-line galaxies for which the published line-ratios give indication of a "transition spectrum"; selected objects are located north...
  • NGC 6221 ionized gas kinematics

    Rotation curves and velocity dispersion profiles are presented for both the stellar and gaseous components along five different position angles (PA =5{deg}, 50{deg}, 95{deg},...
  • UV variability of Fairall-9

    This is a study of the UV variability of the galaxy Fairall-9 between 1978 and 1991. Table 1 shows the UV continuum fluxes measured in three "line-free" windows centered at...
  • The Hamburg/ESO survey for bright QSOs. II.

    We report about the first phase of a wide-angle survey for bright QSOs (12.5<~B<~17.5) in the southern hemisphere, based on objective prism plates taken with the ESO...
  • Warm IRAS sources. IV.

    We present a list of objects observed to have extended line emission in our spectroscopic survey of infrared-warm AGN. Slit spectroscopic data were obtained for 225 galaxies...
  • Chandra source identifications in AKARI NEPD

    We present a catalog of optical and infrared identifications (ID) of X-ray sources in the {AKARI} North Ecliptic Pole (NEP) Deep field detected with Chandra covering ~0.34deg^2^...
  • 12CO and HCN datacubes of NGC 253

    Investigating molecular gas tracers, such as hydrogen cyanide (HCN), to probe higher densities than CO emission across nearby galaxies remains challenging. This is due to the...
  • Broad- and narrow-line Seyfert 1 galaxies

    We report here our comparative analysis of the active galactic nucleus (AGN) and star formation (SF) characteristics of a sample of narrow-line Seyfert 1 (NLS1) and broad-line...
  • HST COS spectrum of I Zwicky 1

    We present an analysis of the Hubble Space Telescope Cosmic Origins Spectrograph spectrum of IZw1 aiming to probe the absorbing medium associated with the active galactic...
  • NIR lines for AGN up to z~3

    Optical rest-frame spectroscopic diagnostics are usually employed to distinguish between star formation and active galactic nucleus (AGN) powered emission. However, this method...
  • MCG 08-11-011 narrowband light curves

    We report the results from a photometric reverberation mapping campaign carried out with the C18 telescope at the Wise Observatory from 2019 to 2020, targeting the active...
  • Circinus galaxy N-band VLTI/MATISSE images

    Active galactic nuclei play a key role in the evolution of galaxies, but their inner workings and physical connection to the host are poorly understood due to a lack of angular...
  • Molecular gas prop. in local Seyfert 2 gal.

    We present a multiwavelength study of the molecular gas properties of a sample of local Seyfert 2 galaxies to assess if, and to what extent, the presence of an active galactic...
  • NGC1068 I-HCN(1-0) and I-HCO+(1-0) maps

    The current understanding of star formation (SF) contemplates that the regulation of this phenomenon in galaxy disks reflects a complex balance between processes that operate in...
  • Turin-SyCAT, Seyferts multifrequency catalog

    We present the first release of Turin-SyCAT, a multifrequency catalog of Seyfert galaxies. We selected Seyfert galaxies considering criteria based on radio, infrared, and...
  • Origins of radio emission in NLS1s

    Narrow-line Seyfert 1 galaxies (NLS1s) are believed to be active galactic nuclei (AGN) in the early stages of their evolution. Several dozen of them have been found to host...
  • NGC1808 ALMA datacubes

    We report on Atacama Large Millimeter Array (ALMA) observations of CO(3-2) emission in the Seyfert2/starburst galaxy NGC 1808, at a spatial resolution of 4pc. Our aim is to...
  • 5 Seyferts reduced CO(2-1) cubes

    Active galactic nucleus (AGN) driven outflows are believed to play an important role in regulating the growth of galaxies, mostly via negative feedback. However, their effects...
  • X-ray absorption in INTEGRAL AGN

    In this work the INTEGRAL hard X-ray selected sample of AGN has been used to investigate the possible contribution of absorbing material distributed within the host galaxies to...
  • NGC 3516 optical flare

    We present observations from the short-term intensive optical campaign (from September 2019 to January 2020) of the changing-look Seyfert NGC 3516. This active galactic nucleus...
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