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Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. VIII. an Intensive HST, IUE, and Ground-based Study of NGC 5548
Veilleux, S.; Shull, J. M.; Malkan, M. A. +109 more
We present the data and initial results from a combined HST/IUE/groundbased spectroscopic monitoring campaign on the Seyfert 1 galaxy NGC 5548 that was undertaken in order to address questions that require both higher temporal resolution and higher signal-to-noise ratios than were obtained in our previous multiwavelength monitoring of this galaxy …
The Ultraviolet Emission Properties of 13 Quasars
Laor, Ari; Schneider, Donald P.; Green, Richard F. +2 more
We analyze the ultraviolet (UV) emission properties of a sample of 13 quasars studied with the Hubble Space Telescope (HST). The quasars redshifts are in the range 0.165 <= z <= 2.06, and their absolute magnitudes are in the range -30.1 <= M_v_ <= -24.4. The data were obtained with the Faint Object Spectrograph and have a spectral reso…
Ultraviolet Observations of SN 1987A with the IUE Satellite
Pun, Chun S. J.; Cassatella, Angelo; Gilmozzi, Roberto +12 more
Ultraviolet (λ: 1150-3300 A) observations of SN 1987A with the IUE satellite provide a unique data set. Observations started the day after discovery, 1987 February 24 (day 1.6), and a total of 751 spectra were obtained through 1992 June 9 (day 1567). The data have been processed to generate a complete catalog of SN 1987A ultraviolet spectra. The d…
Hubble Space Telescope Images of the Nuclear Star-forming Region in the Interacting Galaxy NGC 5930
Bower, Gary A.; Wilson, Andrew S.
High-resolution images of the spiral galaxy NGC 5930 have been obtained with the Planetary Camera aboard the Hubble Space Telescope in the emission lines of [O III] λλ4959, 5007 + Hβ and Hα + [N II] λλ6548, 6583, and their adjacent continua. NGC 5930 is the interacting companion of the Type 2 Seyfert galaxy NGC 5929. Five bright continuum knots, w…