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A Seyfert Nucleus in BL Lacertae
(Astronomical Society of the Pacific, 1999)
We have obtained spectroscopic observations of the broad Ha line in BL Lacertae over a period of 30 months. These data show that the line equivalent width is anti-correlated with the continuum flux implying that the broad ...
A time-variable scattered component to broad Hα in the Seyfert 1 galaxy Mrk 509
(1999)
We present optical spectropolarimetry data for the Seyfert 1 galaxy Mrk 509 for three epochs: 1996 August and 1997 May and August. We confirm previous findings that broad Hα has a significantly greater width in the polarized ...
Monitoring the Ha Line in BL Lacertae - Evidence for an Accretion Disk
(Astronomical Society of the Pacific, 1999)
We present new spectroscopic observations of the recently discovered broad Ha line in BL Lacertae. These data, obtained over a period of 30 months, indicate that the line equivalent width is anti-correlated with the continuum ...
Searching for the hidden broad-line region in Centaurus A
(1999)
We present the first near-infrared (K-band) spectropolarimetric observations of the nuclear region of Centaurus A. Although the data are of high signal-to-noise ratio, polarized broad Brγ is not detected and we place a 3σ ...
Optical Spectropolarimetry of Broad Line Active Galaxies
(Astronomical Society of the Pacific, 1999)
We present new optical spectropolarimetry of two bright type 1 AGNs. The observations are part of a project on broad line active galaxies in which, through data analysis and modelling, we aim to identify the polarization ...