Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80066r&link_type=abstract
Spitzer Proposal ID #80066
Astronomy and Astrophysics
Astronomy
Scientific paper
``The Herschel Lensing Survey'' (HLS; PI: E. Egami; 292.3 hrs) is imaging a sample of 44 massive galaxy clusters in five far-infrared bands 100-500 um. The goal is to surpass the nominal confusion-limited depth of Herschel observations by taking advantage of the gravitational lensing power of massive clusters. IRAC imaging enables a simple and robust method of excluding low redshift interlopers from the lensing sample, provides two additional datapoints for full photometric redshifts and offers a measure of the stellar mass for cluster sources. Furthermore, IRAC provides an intermediate band with relatively precise source astrometry, which is useful for locating the optical counterparts of Herschel-detected galaxies, and hence facilitates the short-wavelength follow-up spectroscopy necessary for redshifts. This is crucial, as our ability to accurately determine galaxy dust properties, and hence total infrared luminosity, from the Herschel SEDs is curtailed by the degeneracy between dust temperature and galaxy redshift. Forty-two HLS clusters already have existing IRAC data. Here we propose a short (2 hour) program to complete the IRAC coverage by observing the remaining two clusters (A368, A3088).
Egami Eiichi E.
Rawle Tim
Rex Marie
Richard Johan
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