An MMT Hectospec Redshift Survey of 24 m Sources in the Spitzer First Look Survey**This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under NASA contract 1407. Academic Article uri icon


  • We present a spectroscopic survey using the MMT Hectospec fiber spectrograph of 24 m sources selected with the Spitzer Space Telescope in the Spitzer First Look Survey. We report 1296 new redshifts for 24 m sources, including 599 with f(24 m) 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(24 m) 1 mJy and 35% complete for i 20.5 mag and 0.3 mJy f(24 m) < 1.0 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 m-selected galaxies to z gal 0.98 and QSOs to Z QSO 3.6, with mean redshifts of z gal = 0.27 and (Z QSO) = 1.1. As part of this publication, we include the redshift catalogs and the reduced spectra; these are also available through the NASA/IPAC Infrared Science Archive. 2006. The American Astronomical Society. All rights reserved.

published proceedings

  • The Astronomical Journal

author list (cited authors)

  • Papovich, C., Cool, R., Eisenstein, D., Le Floch, E., Fan, X., Kennicutt, R. C., ... Vestergaard, M.

citation count

  • 47

complete list of authors

  • Papovich, Casey||Cool, Richard||Eisenstein, Daniel||Le Floc’h, Emeric||Fan, Xiaohui||Kennicutt, Robert C||Smith, JDT||Rieke, GH||Vestergaard, Marianne

publication date

  • July 2006