Filling the IRAC Gap in a Deep MIPS 24-micron Field

Details Filling the IRAC Gap in a Deep MIPS 24-micron Field Filling the IRAC Gap in a Deep MIPS 24-micron Field

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3407y&link_type=abstract

Spitzer Proposal ID #3407

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Scientific paper

As a validation test of the GOODS MIPS program, the Spitzer Space Telescope has obtained a very deep 24-micron exposure covering four MIPS pointings in the ELAIS-N1 field (80 minutes per pointing). These data are public and will be released to the community in the context of the First Look Survey. These observations constitute the deepest ever image of the 24-micron sky to date, and will remain as one of the deepest other than the GOODS observations themselves. This 24-micron field is uniquely important, especially in addressing the mass assembly history of typical luminosity galaxies 1 < z < 2. The MIPS observations are already complemented by deep IRAC data (2 hours per pointing --- also the deepest non-GOODS public data set), but with only 2-band coverage at each position. We propose to complete the full, 4-channel IRAC coverage over the entire MIPS 24-micron field. With the full spectral coverage provided by the IRAC, we will be able to provide redshift estimates for the vast majority of the 24-micron sources. A significant fraction of the 24-micron sources have no R-band counterparts to AB=24.7 mag, which means optical spectroscopic redshifts for these objects are presently impossible. With this IRAC data set, we will greatly boost the diagnostic power of the unique 24-micron data. The proposed observation can be finished in 4.4 hours, including overhead. We request no proprietary period and the data will be released to the public as part of the First Look Survey.

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