231 datasets found

Keywords: seyfert galaxies

Filter Results
  • NGC 5548 Profile variability

    Optical emission line intensities of the variable Seyfert 1 galaxy NGC 5548 are presented.
  • An Ultraviolet Atlas of Quasar and Blazar Spectra

    This atlas contains the ultraviolet spectra of 70 quasars, blazars, and Seyfert 1 galaxies that were produced by combining over 100 low resolution spectra from the International...
  • 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...
  • TESS light curve of AGN NGC 4395

    We present optical light curves from the Transiting Exoplanet Survey Satellite (TESS) for the archetypical dwarf active galactic nucleus (AGN) in the nearby galaxy NGC 4395...
  • X-ray properties of Seyfert 1 galaxies

    We use publicly available XMM-Newton data to systematically compare the hard X-ray photon indices, {Gamma}2-10keV, and the iron K{alpha} emission lines of narrow- and broad-line...
  • NGC 5548 BR photometry

    Deep Hubble Space Telescope Wide Field Camera (WFC-1) imaging of a region 3.7' east of the V=13mag Seyfert galaxy NGC 5548 in the F555W and F785LP bands, and deep ground-based V...
  • Long-term variability of AGN at hard X-rays

    Variability at all observed wavelengths is a distinctive property of active galactic nuclei (AGN). Hard X-rays provide us with a view of the innermost regions of AGN, mostly...
  • PMN J0948+0022 radio-to-gamma-ray monitoring

    We present more than three years of observations at different frequencies, from radio to high-energy gamma-rays, of the Narrow-Line Seyfert 1 (NLS1) Galaxy PMN J0948+0022...
  • AGNs from RXTE 3-20keV All-Sky Survey

    We compiled a sample of 95 AGNs serendipitously detected in the 3-20keV band at Galactic latitude |b|>10deg during the RXTE slew survey (XSS, Revnivtsev et al., Cat. ), and...
  • Sasmirala Subarcsecond mid-infrared atlas of local AGN

    These FITS images were generated with the IDL package MIRphot [Asmus2014] by extraction (and combination) of the sub-images from the chopped/nodded total images from COMICS,...
  • Sasmirala Subarcsecond mid-infrared atlas of local AGN, Cone Search

    The Subarcsecond mid-infrared (MIR) atlas of local active galactic nuclei (AGN) is a collection of all available N- and Q-band images obtained at ground-based 8-meter class...
You can also access this registry using the API (see API Docs).