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The Ionized Gas and Nuclear Environment in NGC 3783 V. Variability and Modeling of the Intrinsic Ultraviolet Absorption
J. R. Gabel, S. B. Kraemer, D. M. Crenshaw +13
We present results on the location, physical conditions, and geometry of the outflow in the Seyfert 1 galaxy NGC 3783 from a study of the variable intrinsic UV absorption. Based on…
Mapping the Kinematics of the Narrow-Line Region in the Seyfert Galaxy NGC 4151
V. Das, D. M. Crenshaw, J. B. Hutchings +6
Using The Hubble Space Telescope's Space Telescope Imaging Spectrograph HST's STIS, observations of the OIII emission from the narrow-line region (NLR) of NGC 4151 were obtained an…
Probing the Ionizing Continuum of Narrow-Line Seyfert 1 Galaxies. I.Observational Results
M. Dietrich, D. M. Crenshaw, S. B. Kraemer
We present optical spectra and emission-line ratios of 12 Narrow-Line Seyfert 1 (NLS1) galaxies that we observed to study the ionizing EUV continuum. A common feature in the EUV co…
Simultaneous X-ray and UV spectroscopy of the Seyfert 1 galaxy NGC 5548.II. Physical conditions in the X-ray absorber
K. C. Steenbrugge, J. S. Kaastra, D. M. Crenshaw +8
We present the results from a 500 ks Chandra observation of the Seyfert 1 galaxy NGC 5548. We detect broadened emission lines of O VII and C VI in the spectra, similar to those obs…