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Optical Spectropolarimetry of Broad Line Active Galaxies

Giannuzzo, M.E.; Corbett, E.A.; Robinson, A.; Young, S.; Hough, J.; Axon, D.J. (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 ...

Monitoring the Ha Line in BL Lacertae - Evidence for an Accretion Disk

Corbett, E.A.; Robinson, A.; Hough, J.; Axon, D.J. (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

Alexander, D.M.; Hough, J.; Young, S.; Bailey, J.; Heisler, C.A.; Lumsden, S.; Robinson, 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 ...

A Seyfert Nucleus in BL Lacertae

Axon, D.J.; Corbett, E.A.; Robinson, A.; Hough, J. (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

Young, S.; Corbett, S.A.; Giannuzzo, M.E.; Hough, J.; Robinson, A.; Bailey, J.; Axon, D.J. (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 ...

The profiles of polarized broad Hα lines in radio galaxies

Corbett, E.A.; Robinson, A.; Axon, D.J.; Young, S.; Hough, J. (1998)

We present spectropolarimetric observations of seven broad-line radio galaxies. We find significantly polarized broad Hα emission in four objects including two, Arp 102B and 3C 390.3, which have double-peaked line profiles. ...

The appearance of broad H alpha in BL Lacertae

Corbett, E.A.; Robinson, A.; Axon, D.J.; Hough, J.; Jeffries, R.D.; Thurston, M.R.; Young, S. (1996)

We present optical spectropolarimetry confirming Vermeulen et al.'s recent discovery of a broad Hα emission line in BL Lacertae. This feature, which is present at about the same strength in spectra taken two days apart, ...