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Chandra Grating Spectroscopy of the Seyfert Galaxy Ton S180
T. J. Turner, I. M. George, T. Yaqoob +6
This paper presents results from spectral observations of Ton S180 using Chandra and ASCA. The data confirm the presence of the soft excess but the Chandra LETG spectrum reveals it…
STIS Echelle Observations of NGC 4151: Variable Ionization of the Intrinsic UV Absorbers
D. M. Crenshaw, S. B. Kraemer, J. B. Hutchings +5
We present echelle observations of the intrinsic UV absorption lines in the Seyfert galaxy NGC 4151, which were obtained with the Space Telescope Imaging Spectrograph (STIS) on the…
Resolved Spectra of the Narrow-Line Region in NGC 1068. III. Physical Conditions in the Emission-Line Gas
Steven B. Kraemer, D. Michael Crenshaw
The physical conditions in the inner narrow line region (NLR) of the Seyfert 2 galaxy NGC 1068 are examined using HST/STIS ultraviolet and optical spectra and photoionization model…
A Kinematic Model for the Narrow-Line Region in NGC 4151
D. M. Crenshaw, S. B. Kraemer, J. B. Hutchings +6
We present a simple kinematic model for the narrow-line region (NLR) of the Seyfert 1 galaxy NGC 4151, based on our previous observations of extended [O III] emission with the Spac…
Resolved Spectroscopy of the Narrow-Line Region in NGC 1068: Kinematics of the Ionized Gas
D. M. Crenshaw, S. B. Kraemer
We have determined the radial velocities of the [O III] emitting gas in the inner narrow-line region (NLR) of the Seyfert 2 galaxy NGC 1068, along a slit at position angle of 202 d…
On The Reddening in X-ray Absorbed Seyfert 1 Galaxies
S. B. Kraemer, I. M. George, T. J. Turner +1
There are several Seyfert galaxies for which there is a discrepancy between the small column of neutral hydrogen deduced from X-ray observations and the much greater column derived…