A MMT/Hectospec Redshift Survey of 24 Micron Sources in the Spitzer First Look Survey

Details A MMT/Hectospec Redshift Survey of 24 Micron Sources in the Spitzer First Look Survey A MMT/Hectospec Redshift Survey of 24 Micron Sources in the Spitzer First Look Survey

2005-12-28

arxiv.org/abs/astro-ph/0512623v2

Astron.J.132:231-241,2006

Astronomy and Astrophysics

Astrophysics

Accepted for publication in the Astronomical Journal, AASTEX format, 23 pages, 7 figures (some in color). This replacement is

Scientific paper

10.1086/504598

We present a spectroscopic survey using the MMT/Hectospec fiber spectrograph of 24 micron sources selected with the Spitzer Space Telescope in the Spitzer First Look Survey. We report 1296 new redshifts for 24 micron sources, including 599 with f(24micron) > 1 mJy. Combined with 291 additional redshifts for sources from the Sloan Digital Sky Survey (SDSS), our observing program was highly efficient and is ~90% complete for i' < 21 mag and f(24micron) > 1 mJy, and is 35% complete for i' < 20.5 mag and 0.3 mJy < f(24micron) < 1 mJy. Our Hectospec survey includes 1078 and 168 objects spectroscopically classified as galaxies and QSOs, respectively. Combining the Hectospec and SDSS samples, we find 24 micron-selected galaxies to z < 0.98 and QSOs to z < 3.6, with mean redshifts of = 0.27 and =1.1. As part of this publication, we include the redshift catalogs and the reduced spectra; these are also available online (http://mips.as.arizona.edu/~papovich/fls) and through the NASA/IPAC Infrared Science Archive (http://irsa.ipac.caltech.edu).

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