11 papers · 1 filter
PHL 1811: The Local Prototype of the Lineless High-z SDSS QSOs
Karen M. Leighly, Jules P. Halpern, Edward B. Jenkins
Abridged) In the SDSS, several unusual QSOs have been discovered that have very blue rest-frame UV spectra but no discernible emission lines. Their UV spectra strongly resemble tha…
Modeling AGN spectra with PHOENIX: a self-consistent approach
Darrin Casebeer, Edward A. Baron, David Branch +1
We find that spectra of certain Iron Low Ionization Broad Absorption Line (FeLOBAL) QSOs, which are characterized by low--ionization emission and blue shifted absorption lines, can…
A Chandra Observation of the Luminous NLS1 1H 0707-495
Karen M. Leighly, Andrzej A. Zdziarski, Toshihiro Kawaguchi +1
We present preliminary results from a long Chandra HETG observation of the luminous Narrow-line Seyfert 1 galaxy 1H 0707-495. We find a complex X-ray spectrum comprised of a two-co…
Extreme X-ray Behavior in the Low-Luminosity Active Nucleus of NGC 4395
E. C. Moran, M. Eracleous, K. M. Leighly +4
We present the results of a 17 ks Chandra observation of the nearby dwarf spiral galaxy NGC 4395, focusing on the X-ray properties of the moderate-mass black hole that resides in i…
STIS Ultraviolet Spectral Evidence for Outflows in Extreme Narrow-Line Seyfert 1 Galaxies
Karen M. Leighly
(abridged) I present and discuss the results of HST STIS observations of IRAS 13224-3809 and 1H 0707-495, two narrow-line Seyfert 1 (NLS1) galaxies. We discovered that high-ionizat…
The enigmatic soft X-ray NLS1 RX J0134.2-4258
D. Grupe, K. M. Leighly, H. -C. Thomas +1
We report the discovery and analysis of the follow-up ROSAT pointed observation, an ASCA observation and optical and radio observations of the enigmatic Narrow-Line Seyfert 1 galax…