IRS Observations of a Strongly Lensed LIRG Behind the Bullet Cluster

Details IRS Observations of a Strongly Lensed LIRG Behind the Bullet Cluster IRS Observations of a Strongly Lensed LIRG Behind the Bullet Cluster

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop..496g&link_type=abstract

Spitzer Proposal ID #496

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Scientific paper

We propose to observe a luminous infrared galaxy at z~2.7 that is highly lensed (factor of ~50 magnification) by the Bullet Cluster. This galaxy is a strong 24 micron and submillimeter source due to this magnification, yet the intrinsic infrared luminosity of this galaxy is lower than any other obscured galaxies previously observed with IRS at these redshifts. We will use IRS spectra and peak-up imaging to (1) obtain a spectroscopic redshift, (2) quantify the AGN contribution to the observed 24 micron emission, and (3) determine the star-formation rate from the Paschen alpha line. IRS is required because there is no other means of achieving these objectives; DDT is required because the 24 micron data on which this program is based was obtained after the Cycle 5 deadline.

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