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High Resolution 2-D Imaging Polarimetry of the Jet of M87, in the Light of U, B and V

Published online by Cambridge University Press:  25 April 2016

N. Visvanathan  and
A. J. Pickles
N. Visvanathan
Affiliation:
Mt Stromlo Siding Spring Observatories, A.N.U.
A. J. Pickles
Affiliation:
Mt Stromlo Siding Spring Observatories, A.N.U.
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Extract

The polarisation observations of the central region (containing the jet) of the galaxy M87 were obtained in May 1980, with the polarimeter (Visvanathan 1972) attached to the f/15 cassegrain focus of the AAT. The IPCS was used in direct mode to record the images of the field. Figure 1 shows a single, raw image of M87 in the light of B (the image shown is 90 arcsec square). The knots referred to in the text are marked. One complete observation consists of 12 images of the object field, corresponding to the 12 selected position angles of the polaroid filter, rotated from 0° to 330° in 30° increments. The Taurus software (Taylor and Atherton 1980) was used to increment the data to the relevant memory location. The data were stored on tape after a sufficient number of complete rotations of the polaroid were completed.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 4 , Issue 2 , 1981 , pp. 177 - 180
Copyright
Copyright © Astronomical Society of Australia 1981

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