=========================================================================== COSMOS Chandra Merged Image Data (X-ray band) Version 1.0 =========================================================================== 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, NASA's Chandra X-ray Observatory and the Japanese 8-meter Subaru telescope in Hawaii. These data are part of the first public release of the COSMOS observations from the ACIS instrument on Chandra. Included in this release dataset are merged images and effective exposure maps representing the X-ray energy bands 0.5 - 2 keV (soft), 2 keV - 7 keV (hard), and 0.5 - 7 keV (full). Each image and exposure map covers the entire 0.9 sq deg field of the Chandra-COSMOS survey. The key characteristics of these data: Instrument: Chandra ACIS-I Dates of observations: (Nov 2006 - Jun 2007) Observing time: 1.8 Msec Energy band: 0.5 - 7 keV Area: 0.9 sq deg Resolution: 1.0"/pixel These data were generated by Nico Cappelluti. The data products include: (1) CC_img.fits.gz - Merged X-ray image files (counts) (2) CC_expmap.fits.gz - Corresponding effective exposure maps (sec) Here is 0520, 2070, or 0570 corresponding to the soft, hard, and full energy bands respectively. Further information may be obtained from the main COSMOS web page: http://cosmos.astro.caltech.edu/ and the Chandra-COSMOS web page: http://chandracosmos.cfa.harvard.edu/ =========================================================================== The COSMOS Team, Patrick Shopbell (Archive Lead), and Tom Aldcroft pls@astro.caltech.edu, taldcroft@cfa.harvard.edu July 22, 2008