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COSMOS Observations: Spitzer Space Telescope

S-COSMOS (PI: D. Sanders) is a deep infrared imaging survey of the COSMOS field with the SPITZER space telescope. In Cycle 2, we have obtained deep IRAC and shallow MIPS observations over the full 2 square degree field. In Cycle 3 we have proposed to obtain deep MIPS observation over the entire field.

  • IRAC-Deep: Cycle 2 observations covering the full field
    • 166 hours of observations, covering 2 square degrees in four bands 3.6μm, 4.5μm, 5.8μm and 8.0μm.
    • Data products:
      1. flux calibrated image with absolute astrometry over the full COSMOS field
      2. a source catalog (positions, fluxes, sizes) of nearly 350000 sources (at 3.6μm).
    • Goals:
      • build a large and robust photometric redshift sample at 1<z<5
      • stellar mass evolution
  • MIPS-Shallow: Cycle 2 observations covering the full field
    • 16 hours of observations (cycle 2) covering 2 square degrees in three bands 24μm, 70μm , 160μm.
    • Data products:
      1. flux calibrated image with absolute astrometry over the full COSMOS field
      2. a source catalog of the brightest sources (positions, fluxes, sizes)
    • Goals:
      • identify star forming galaxies at z<0.5
      • AGN identifications at z<0.5
  • MIPS-Deep: Cycle 2 "test" observations covering only 8% of the field
    • 38 hours of observations (cycle 2) covering 0.16 square degrees in three bands 24μm, 70μm, 160μm.
    • Data products:
      1. flux calibrated image with absolute astrometry
      2. a source catalog (positions, fluxes, sizes)
    • Goals:
      • identify star forming galaxies out to z~4
      • AGN identifications out to z~4

Additional observing time has been proposed in Cycle 3 to obtain MIPS-Deep coverage over the entire 2 square degree field.
Additional information on the SPITZER observations can be found on the S-COSMOS website.