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Studies of broad emission line profiles in QSOs - II. Properties of a large, predominantly radio selected sample
(Oxford University Press (OUP), 1986)
Emission line parameters for 214 QSOs are reported. The majority were originally selected according to the flatness of their radio spectra from the Parkes 2700, 5000 MHz surveys. The optical spectra of these objects were ...
The H-beta emission line profile of Arakelian 120
(IOP Publishing, 1983)
A high-quality (S/N in the range from 30 to 100), high-resolution (approximately 1.8 A) spectrum of the photometrically and spectroscopically variable Seyfert 1 galaxy Arakelian 120 has been obtained in the wavelength ...
The diversity of soft X-ray spectra in quasars
(IOP Publishing, 1985)
Soft X-ray spectra for three quasars obtained with the Einstein Imaging Proportional Counter covering the 0.1-4.0 keV band are reported. Power-law fits to these spectra have best-fit energy indices of 1.2 +0.6 or -0.2, for ...
The variability of the spectrum of Arakelian 120. II - Evidence for a small broad line emitting region
(IOP Publishing, 1985)
The results of four years of spectroscopic and photometric observations of the Seyfert galaxy Akn 120 are reported. The observations were carried out using the image dissector scanner attached to the Perkins 1.8-meter ...
Quasar energy distributions. I - Soft X-ray spectra of quasars
(IOP Publishing, 1987)
As the initial stage of a study of quasar energy distributions (QEDs), Einstein IPC spectra of 24 quasars are presented. These are combined with previously reported IPC spectra to form a sample of 33 quasars with well-determined ...
Is optical Fe II emission related to the soft X-ray properties of quasars?
(IOP Publishing, 1987)
Radio-quiet quasars generally show broad, blended multiplets of Fe II emission in their optical and UV spectra. Radio-loud quasars also show UV Fe II emission, but their optical Fe II emission is generally weaker. No ...
PG0946 + 301 - A low-redshift, broad absorption line QSO
(IOP Publishing, 1985)
The discovery of a new broad absorption line (BAL) QSO with the lowest emisson-line redshift to date (z = 1.216) is reported. The data provide evidence for complex broad absorption up to velocities ≡14,500 km s-1 relative ...
Studies of broad emission line profiles in QSOs - I. Observed, high-resolution profiles
(Oxford University Press (OUP), 1984)
High-resolution spectra of nine high-redshift QSOs are presented. The various emission line profiles of each QSO are intercompared in order to gain information on the kinematics of the emitting gas in the broad-line region ...
Accurate galactic N(H) values towards quasars and AGN
(IOP Publishing, 1989)
Integrated Galactic 21-cm column densities toward about 174 quasars and AGN are presented. The data are corrected for stray radiation, using the technique of Lockman et al. (1986). Because of the 21-arcmin beam size of the ...
Damped Lyman-alpha absorption by disk galaxies with large redshifts. III - Intermediate-resolution spectroscopy
(IOP Publishing, 1989)
New intermediate-resolution spectroscopy for six members of a sample of 68 moderate- to high-redshift QSOs is presented. Evidence is reported which indicates that seven strong absorption features in the QSO spectra are due ...