Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.6202v&link_type=abstract
American Astronomical Society Meeting 210, #62.02; Bulletin of the American Astronomical Society, Vol. 39, p.170
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The Canada-France-Hawaii Telescope Legacy Survey is for France and Canada an unprecedented endeavor in many ways. With 500 nights over five years devoted to a common project, the CFHTLS represents the largest project ever undertaken at CFHT. With a PI-less structure, the survey is steered by a group of scientists representing the two communities and the three institutions dealing with the operation of the survey (CFHT for the observations and pre-processing, TERAPIX for the data processing, CADC for the data archive and distribution). It had to go through a thorough evaluation process by the CFHT Scientific Advisory Council, but was decided by the national Agencies without the advice of the Time Allocation Committees. The survey had a slow start, but the science considered as the most important was relatively well protected from the initial problems encountered with a brand new instrumentation (MegaPrime-MegaCam) and the unusual bad weather experienced on Mauna Kea these past years. Of the three components initially part of the CFHTLS, one of them had to pay the price of this slow start and to be abandoned on the way. This presentation will describe the overall structure of the CFHTLS. It will look back at the hopes and critics it triggered within the two communities involved and how the real world made the survey, its priorities, and its day-to-day operation evolve over the past four years. It will also highlight the unquestionable overall success of the survey, while considering the impact of such a large project, with its many time constraints and high image quality requirements, on the access and operation of an instrument shared half-half between the survey and PI programs on a telescope offered to more than just France and Canada.
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