Clarke, D. and Neumayer, D. (2002) Experiments with a novel CCD stellar polarimeter. Astronomy and Astrophysics, 383(1), pp. 360-366. (doi: 10.1051/0004-6361:20011717)
|
Text
28162.pdf 332kB |
Publisher's URL: http://dx.doi.org/10.1051/0004-6361:20011717
Abstract
Experiments and observations have been undertaken with "bread-board" equipment to explore the potential of a "ring" stellar polarimeter with a CCD camera, rather than photographic plates used in Treanor's (1968) original instrument. By spreading the polarimetric signal over a large number of pixels on the detector, design prediction suggests that the polarimetric accuracy could be ~Δρ±0.00001 or ±0.001% per frame or even better. Although the photon accumulations suggest that this was achieved, instabilities in the employed crude modulator system provided frame to frame measurements with a greater than expected scatter. Software was developed to reduce the data in a simple way. With a design using more professional components and perhaps with more sophisticated reduction procedures, the full potential of the method should be achievable with the prospect of high precision polarimetry of the brighter stars. As an experimental bonus, the employed CCD chip was found to be free from any measurable polarizational sensitivity.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Clarke, Dr David |
Authors: | Clarke, D., and Neumayer, D. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Astronomy and Astrophysics |
Publisher: | EDP Sciences |
ISSN: | 0004-6361 |
ISSN (Online): | 1432-0746 |
Copyright Holders: | Copyright © 2002 EDP Sciences |
First Published: | First published in Astronomy and Astrophysics 383(1):360-366 |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
University Staff: Request a correction | Enlighten Editors: Update this record