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COSMOS XMM Data                                                 Version 1.0
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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 year of the XMM X-ray observations,
including 25 pointings across the entire two square degrees.

The key characteristics of these data:

	Instrument:		XMM European Photon Imaging Camera (EPIC)
	Dates of observations:	AO-3 (Dec 2003 - Jun 2005)
	Observing time:		~30 ksec / pointing
	Energy range:		0.5 - 10.0 keV
	Area:			~2 sq deg
	Resolution:		4"/pixel

The data products available here include:

  (1) Three exposure sets, created from the original
      X-ray photon event files, filtered by photon energy:

	xmm_0520_*_10.fits	0.5 keV < e <  2.0 keV
	xmm_2045_*_10.fits	2.0 keV < e <  4.5 keV
	xmm_45100_*_10.fits	4.5 keV < e < 10.0 keV

      Each exposure set contains eight images, where the "*"
      in the file name pattern shown above is:

	[none] - background subtracted image
        c      - background subtracted, exposure corrected
                  image in units of MOS1 counts/sec
        err    - corresponding error file
        exp    - exposure map in units of effective MOS1 seconds
        wv     - wavelet reconstruction in units of MOS1 counts/sec
	hswv, s2, s2ns2 - other files

  (2) A pair of 3-color PNG files produced by combining the
      above images (xmm_wv_rgb_10.png, xmm_s2n_10.png).

Further information may be obtained from the XMM-COSMOS web page:

	http://www.mpe.mpg.de/~matute/XMMCosmos/index.html

or the main COSMOS web page:

	http://cosmos.astro.caltech.edu/

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The COSMOS Team, Patrick Shopbell (Archive Lead), and Alexis Finoguenov
pls@astro.caltech.edu, alexis@xray.mpe.mpg.de

July 15, 2005
pls@astro.caltech.edu