229 datasets found

Keywords: seyfert galaxies

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  • Spectropolarimetry of active galaxy 3C 390.3

    Here we present the spectropolarimetric observations of the radio-loud active galaxy 3C 390.3 in the period 2009-2014 (24 epochs). The galaxy has been observed with the 6-m...
  • Spectral parameters for Mrk 335 and Ark 564

    We present a comprehensive flux-resolved spectral analysis of the bright narrow-line Seyfert 1 AGNs, Mrk 335 and Ark 564 using observations by XMM-Newton satellite. The mean and...
  • X-ray sources in the AKARI NEP deep field

    We present data products from the 300ks Chandra survey in the AKARI North Ecliptic Pole (NEP) deep field. This field has a unique set of 9-band infrared photometry covering 2-24...
  • Subarcsecond mid-infrared atlas of local AGN

    We present the first subarcsecond-resolution mid-infrared (MIR) atlas of local active galactic nuclei (AGN). Our atlas contains 253 AGN with a median redshift of z=0.016, and...
  • PKS 0558-504 UVOT and XRT monitoring

    PKS 0558-504 is a highly-variable, X-ray-bright, radio-loud, narrow-line Seyfert 1 galaxy with super-Eddington accretion rate and extended jets that do not dominate the emission...
  • Type 1 AGN at low z. III.

    We present the optical narrow-line ratios in a Sloan Digital Sky Survey (SDSS) based sample of 3175 broad H{alpha} selected type 1 active galactic nuclei (AGN), and explore...
  • Mrk 6 H{alpha}, H{beta} and H{gamma} spectra

    We present the results of optical spectral and photometric observations of the nucleus of Markarian 6 made with the 2.6-m Shajn telescope at the Crimean Astrophysical...
  • FeK lines in Seyfert 1 galaxies

    We construct full broad-band models in an analysis of Suzaku observations of nearby Seyfert 1 active galactic nuclei (AGN) (z<=0.2) with exposures >50ks and with greater...
  • Emission-line properties of Seyfert 2 nuclei

    This is the third paper of a series devoted to the study of the global properties of Joguet's sample (2001A&A...380...19J) of 79 nearby galaxies observable from the southern...
  • Radio galaxies in the 2dFGRS

    We use redshift determinations and spectral analysis of galaxies in the 2dF Galaxy Redshift Survey () to study the properties of local radio sources with S>=1mJy. 557 objects...
  • Universidad Complutense de Madrid list 1

    A low dispersion objective-prism survey for low-redshift emission-line galaxies (ELGs) is being carried out by the University Complutense de Madrid with the Schmidt telescope at...
  • IRAS 1Jy sample of ultraluminous galaxies. II.

    An R and K' atlas of the IRAS 1 Jy sample of 118 ultraluminous infrared galaxies (ULIGs) was presented in a companion paper (our Paper I, Kim et al., 2002, Cat. ). The present...
  • IRAS 1Jy sample of ultraluminous galaxies. I.

    An imaging survey of the IRAS 1Jy sample of 118 ultraluminous infrared galaxies was conducted at optical (R) and near-infrared (K') wavelengths using the University of Hawaii...
  • VLA radio continuum survey of Seyfert galaxies

    We have used the Very Large Array (VLA) to conduct a survey for radio continuum emission in the sample of 52 Seyfert nuclei selected from the optical spectroscopic galaxy...
  • Universidad Complutense de Madrid list 3

    A new low-dispersion objective-prism search for low-redshift (z<0.045) emission-line galaxies (ELGs) has been carried out by the Universidad Complutense de Madrid using the...
  • A diagnostic diagram for Seyfert 2 Galaxies

    We present and discuss a three-dimensional diagnostic diagram for Seyfert 2 galaxies obtained using X-ray and [O III] data on a large sample of objects (reported in the...
  • H II Regions in Nearby Seyfert Galaxies

    Continuum-subtracted Halpha images of 17 nearby Seyfert galaxies are presented. The images are calibrated astrometrically using the Hubble Space Telescope Guide Star Catalog...
  • Universidad Complutense de Madrid list 2

    A low dispersion objective-prism survey for low-redshift emission-line galaxies (ELGs) is being carried out by the University Complutense de Madrid with the Schmidt telescope at...
  • H II Regions in Seyfert galaxies. I.

    Data on positions, effective diameters, and absolute fluxes of H II regions on 21 Seyfert spiral galaxies are presented together with the H{alpha} + [N II] images and...
  • Chandra X-ray sources of NGC 1068

    We present an analysis of the compact X-ray source population in the Seyfert 2 galaxy NGC 1068, imaged with a 50ks Chandra observation. We find a total of 84 compact sources on...
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