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Extragalactic abstracts - IRSA - California Institute of Technology

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Mar 25, 10 16:24 Spitzer_Approved_<strong>Extragalactic</strong> Page 241/742<br />

population <strong>of</strong> Compton−obscured AGN, and to calibrate the use <strong>of</strong> 24 micron data<br />

for studying high redshift galaxy evolution.<br />

Spitzer_Approved_<strong>Extragalactic</strong><br />

Printed_by_SSC<br />

Mar 25, 10 16:24 Page 242/742<br />

Spitzer Space Telescope − General Observer Proposal #30823<br />

Pushing the Far−IR Capability <strong>of</strong> Spitzer in the Study <strong>of</strong> High−Redshift ULIRGs<br />

Principal Investigator: Charles Dowell<br />

Institution: Jet Propulsion Laboratory<br />

Technical Contact: Charles Dowell, Jet Propulsion Laboratory<br />

Co−Investigators:<br />

Colin Borys, University <strong>of</strong> Toronto (Canada)<br />

Eiichi Egami, University <strong>of</strong> Arizona<br />

Michael Zemcov, Cardiff University (UK)<br />

Science Category: high−z galaxies (z>0.5)<br />

Observing Modes: MipsPhot<br />

Hours Approved: 60.4<br />

Abstract:<br />

We propose deep MIPS 70 and 160 micron observations <strong>of</strong> a sample <strong>of</strong><br />

submillimeter−selected high−redshift ultraluminous infrared galaxies (ULIRGs).<br />

For the first time, we will explore the diversity <strong>of</strong> their far−infrared spectral<br />

distributions −− in particular, on the Wien side <strong>of</strong> the graybody peak −− and<br />

measure accurately the integrated infrared luminosity. The targets are drawn<br />

from a sample <strong>of</strong> 850 micron sources at z > 1 amplified by foreground galaxy<br />

clusters, where the lensing allows us to measure galaxies which would otherwise<br />

be too faint for detection and may also lower the confusion noise. Our program<br />

is complemented by ground−based 350 micron imaging, which quantifies the<br />

graybody spectrum.<br />

Thursday March 25, 2010 xgal_covers.txt<br />

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