Astrophysical: Active galactic nuclei

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    Spectrophotometric monitoring of high luminosity active galactic nuceli. I - The methods and data
    The 2.5-m Isaac Newton telescope has been used in a spectrophotometric monitoring program of high-luminosity AGN. The data acquisition and analysis techniques...
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    Spectroscopic monitoring of active galactic nuclei. 3: Size of the broad line region in NGC 3227
    We present in this work the results of a five-month monitoring campaign of the active galactic nucleus in NGC 3227. Both the Balmer H-beta and H-alpha emission...
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    Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516
    We present results of a five month spectroscopic monitoring campaign of the Seyfert-1 galaxy NGC 3516. Using a new calibration method and applying a correction...
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    Star formation and AGN
    We analyze the data from narrow band H-alpha and forbidden O III CCD imaging of a sample of nearby spiral galaxies with active nuclei. The results show that the...
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    Star formation in stellar systems
    The present volume on stellar formation discusses basic physical principles relevant to such processes, regions of recent star formation, galaxy formation and...
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    Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. 5: Variability of the ultraviolet continuum and emission lines of NGC 3783
    We report on the results of intensive ultraviolet spectral monitoring of the Seyfert 1 galaxy NGC 3783. The nucleus of NGC 3783 was observed with the...
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    Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. 6: Variability of NGC 3783 from ground-based data
    The Seyfert 1 galaxy NGC 3783 was intensely monitored in several bands between 1991 December and 1992 August. This paper presents the results from the ground...
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    Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. I - an 8 month campaign of monitoring NGC 5548 with IUE
    Emission-line and UV continuum observations of the type I Seyfert galaxy NGC 5548 were carried out for a period of 8 months with the IUE satellite. It was found...
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    Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. II - an intensive study of NGC 5548 at optical wavelengths
    A large, international program of ground-based optical spectroscopy and photometry of the variable Seyfert 1 galaxy NGC 5548 undertaken in support of an IUE...