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Proceedings Paper

CFHT's SkyProbe: a real-time sky-transparency monitor
Author(s): Jean-Charles Cuillandre; Eugene A. Magnier; Sidik Isani; Daniel Sabin; Wiley Knight; Simon Kras; Kamson Lai
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Paper Abstract

We have developed a system at the Canada-France-Hawaii Telescope (CFHT), SkyProbe, which allows for the direct measurement of the true attenuation by clouds once per minute, within a percent, directly on the field pointed by the telescope. It has been possible to make this system relatively inexpensively due to the low-cost CCD cameras from the amateur market. A crucial addition to this hardware is the quite recent availability of a full-sky photometry catalog at the appropriate depth: the Tycho catalog, from the Hipparcos mission. The central element is the automatic data analysis pipeline developed at CFHT, Elixir, for the improved operation of the CFHT wide-field imagers, CFH12K and MegaCam. SkyProbe’s FITS images are processed in real-time and the pipeline output (a zero point attenuation) provides the current sky transmission to the observers and helps immediate decision making. These measurements are also attached to the archived data, adding a key criteria for future use by other astronomers.

Paper Details

Date Published: 2 January 2002
PDF: 7 pages
Proc. SPIE 4844, Observatory Operations to Optimize Scientific Return III, (2 January 2002); doi: 10.1117/12.460613
Show Author Affiliations
Jean-Charles Cuillandre, Canada-France-Hawaii Telescope Corp. (United States)
Eugene A. Magnier, Canada-France-Hawaii Telescope Corp. (United States)
Sidik Isani, Canada-France-Hawaii Telescope Corp. (United States)
Daniel Sabin, Canada-France-Hawaii Telescope Corp. (United States)
Wiley Knight, Canada-France-Hawaii Telescope Corp. (United States)
Simon Kras, Canada-France-Hawaii Telescope Corp. (United States)
Kamson Lai, Canada-France-Hawaii Telescope Corp. (United States)

Published in SPIE Proceedings Vol. 4844:
Observatory Operations to Optimize Scientific Return III
Peter J. Quinn, Editor(s)

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