Thompson, SJ;
Doel, AP;
Bingham, RG;
Charalambous, A;
Myers, RM;
Bissonauth, N;
Clark, P;
(2005)
Results from the adaptive optics coronagraph at the William Herschel Telescope.
Monthly Notices of the Royal Astronomical Society
, 364
(4)
1203 - 1210.
10.1111/j.1365-2966.2005.09628.x.
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Abstract
Described here is the design and commissioning of a coronagraph facility for the 4.2-m William Herschel Telescope (WHT) and its Nasmyth Adaptive Optics for Multi-purpose Instrumentation (NAOMI). The use of the NAOMI system gives an improved image resolution of similar to 0.15 arcsec at a wavelength of 2.2 mu m. This enables the Optimised Stellar Coronagraph for Adaptive optics (OSCA) to suppress stellar light using smaller occulting masks and thus allows regions closer to bright astronomical objects to be imaged. OSCA provides a selection of 10 different occulting masks with sizes of 0.25-2.0 arcsec in diameter, including two with full grey-scale Gaussian profiles. There is also a choice of different sized and shaped Lyot stops (pupil plane masks). Computer simulations of the different coronagraphic options with the NAOMI segmented mirror have relevance for the next generation of highly segmented extremely large telescopes.
| Type: | Article |
|---|---|
| Title: | Results from the adaptive optics coronagraph at the William Herschel Telescope |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/j.1365-2966.2005.09628.x |
| Publisher version: | https://doi.org/10.1111/j.1365-2966.2005.09628.x |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | instrumentation : adaptive optics, instrumentation : miscellaneous, STELLAR CORONAGRAPH |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/9447 |
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