=========================================================================== COSMOS CFHT Data Version 5.0 =========================================================================== The Cosmic Evolution Survey (COSMOS) is an HST Treasury Project to survey a 2 square degree equatorial field, centered on RA=10:00:28.6 and DEC=+02:12:21.0, using the ACS camera. The project also incorporates major commitments from other observatories around the world, including the VLA radio telescope, ESO's VLT in Chile, ESA's XMM X-ray satellite, and the Japanese 8-meter Subaru telescope in Hawaii. These data represent the first four years of imaging on CFHT in u* band. These data are NOT psf homogenized. The filter transmission profile is included in the file CFHT_filter_u.txt. If you use these data in your work, please cite it as follows as follows: McCracken, H.J., Capak, P., Salvato, M., et al. 2010, ApJ, 708, 202 The key characteristics of these data are: Telescope: Canada-France-Hawaii 3.6m Telescope Instrument: MegaPrime Effective Wavelength: 379.8nm Filter Width: 72.0nm Flux unit: nJy Zero Point 31.4 Area: ~4 sq degrees Resolution: 0.15"/pix Seeing: 0.9" PSF Homogenized: NO The data products available here include the following at each of 144 tiled positions: 1) an image in units of nJy 2) a map of the image RMS in units of nJy A tile diagram is included with the data. These data were reduced by Henry J. McCracken (hjmcc@iap.fr) and the TERAPIX team (terapix@iap.fr) using the ELIXIR and TERAPIX pipelines. SWarp v.2.16 and Terapix software from 2006-08-09 were used for the reduction. Information on Elixir can be found at: http://www.cfht.hawaii.edu/Instruments/Elixir/ Information on Terapix can be found at: http://terapix.iap.fr/ These data were prepared for release by: Peter Capak (capak@astro.caltech.edu) Patrick Shopbell (pls@astro.caltech.edu) Further information may be obtained from the COSMOS web page: http://cosmos.astro.caltech.edu/ =========================================================================== May 1, 2008