Browsing Chapman, Scott by Author "Helou, G."

Now showing items 1-11 of 11

  • The bi-variate luminosity-color distribution of IRAS galaxies, and implications for the high redshift Universe 

    Chapman, S. C., G. Helou, G. F. Lewis, and D. A. Dale. 2003. "The bi-variate luminosity-color distribution of IRAS galaxies, and implications for the high redshift Universe." 588(1): 186-198
    We present a characterization of the local luminosity-color, bi-variate distribution of IRAS galaxies from the 1.2Jy sample, selected at 60 micron. The S60/S100 infrared color is used as the best single parameter description ...

  • Characterization of Extragalactic 24micron Sources in the Spitzer First Look Survey 

    Yan, Lin, G. Helou, D. Fadda, F. R. Marleau, et al. 2004. "Characterization of Extragalactic 24micron Sources in the Spitzer First Look Survey." The Astrophysical Journal Supplement Series 154(1): 60-65
    In this Letter, we present the initial characterization of extragalactic 24um sources in the Spitzer First Look Survey (FLS) by examining their counterparts at 8um and R-band. The color-color diagram of 24-to-8 vs. 24-to-0.7um ...

  • A Deep WSRT 1.4 GHz Radio Survey of the Spitzer Space Telescope FLSv Region 

    Morganti, R., M. A. Garrett, S. Chapman, W. Baan, et al. 2004. "A Deep WSRT 1.4 GHz Radio Survey of the Spitzer Space Telescope FLSv Region." 424(1): 371-378
    The First Look Survey (FLS) is the first scientific product to emerge from the Spitzer Space Telescope. A small region of this field (the verification strip) has been imaged very deeply, permitting the detection of ...

  • Extragalactic Source Counts at 24 Microns in the Spitzer First Look Survey 

    Marleau, Francine R., D. Fadda, L. J. Storrie-Lombardi, G. Helou, et al. 2004. "Extragalactic Source Counts at 24 Microns in the Spitzer First Look Survey." The Astrophysical Journal Supplement Series 154(1): 66-69
    We present the Spitzer MIPS 24 micron source counts in the Extragalactic First Look Survey main, verification and ELAIS-N1 fields. Spitzer's increased sensitivity and efficiency in large areal coverage over previous infrared ...

  • The Far- and Mid-Infrared/Radio Correlations in the Spitzer Extragalactic First Look Survey 

    Appleton, P. N., D. T. Fadda, F. R. Marleau, D. T. Frayer, et al. 2004. "The Far- and Mid-Infrared/Radio Correlations in the Spitzer Extragalactic First Look Survey." 154(1):The Astrophysical Journal Supplement Series 147-150
    Using the SPITZER SPACE TELESCOPE and the VLA, we present the first DIRECT evidence that the well-known far-infrared/radio correlation is valid to cosmologically significant redshift. We also confirm, with improved statistics ...

  • The Infrared Array Camera component of the Spitzer Space Telescope Extragalactic First Look Survey 

    Lacy, M., G. Wilson, F. Masci, L. J. Storrie-Lombardi, et al. 2005. "The Infrared Array Camera component of the Spitzer Space Telescope Extragalactic First Look Survey." The Astrophysical Journal Supplement Series 161(1): 41-52
    We present Infrared Array Camera (IRAC) data and source catalogs from the Spitzer Space Telescope Extragalactic First Look Survey. The data were taken in four broad bands centered at nominal wavelengths of 3.6, 4.5, 5.8 ...

  • Infrared Properties of Radio-Selected Submillimeter Galaxies in the Spitzer First Look Survey Verification Field 

    Frayer, D. T., S. C. Chapman, L. Yan, L. Armus, et al. 2004. "Infrared Properties of Radio-Selected Submillimeter Galaxies in the Spitzer First Look Survey Verification Field." The Astrophysical Journal Supplement Series 154(1): 137-141
    We report on submillimeter and infrared observations of 28 radio-selected galaxies in the Spitzer First Look Survey Verification field (FLSV). All of the radio-selected galaxies that show evidence for emission at 850um ...

  • Mid- to far infrared properties of star-forming galaxies and active galactic nuclei 

    Magdis, G. E., D. Rigopoulou, G. Helou, D. Farrah, et al. 2013. "Mid- to far infrared properties of star-forming galaxies and active galactic nuclei." Astronomy and Astrophysics 558: A136
    We study the mid- to far-IR properties of a 24um-selected flux-limited sample (S24 > 5mJy) of 154 intermediate redshift (~0.15), infrared luminous galaxies, drawn from the 5MUSES survey. By combining existing mid-IR ...

  • Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey 

    Lacy, M., L. J. Storrie-Lombardi, A. Sajina, P. N. Appleton, et al. 2004. "Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey." The Astrophysical Journal 154(1): 166-169
    Selection of active galactic nuclei (AGN) in the infrared allows the discovery of AGN whose optical emission is extinguished by dust. In this paper, we use the Spitzer Space Telescope First Look Survey (FLS) to assess what ...

  • Optically faint counterparts to the ISO-FIRBACK 170 micron population: the discovery of cold, luminous galaxies at high redshift 

    Chapman, S. C., I. Smail, R. J. Ivison, G. Helou, et al. 2002. "Optically faint counterparts to the ISO-FIRBACK 170 micron population: the discovery of cold, luminous galaxies at high redshift." The Astrophysical Journal 573(1): 66-74
    We present Keck spectroscopy and UKIRT near-IR imaging observations of two 170micron-selected sources from the ISO-FIRBACK survey which have faint counterparts in the optical, and r-K~5. Both sources were expected to lie ...

  • The Spitzer Space Telescope Extra-Galactic First Look Survey: 24 micron data reduction, catalog, and source identification 

    Fadda, Dario, F. R. Marleau, L. J. Storrie-Lombardi, D. Makovoz, et al. 2006. "The Spitzer Space Telescope Extra-Galactic First Look Survey: 24 micron data reduction, catalog, and source identification." The Astronomical Journal 131(6): 2859-2876
    We present the reduction of the 24 micron data obtained during the first cosmological survey performed by the Spitzer Space Telescope (First Look Survey, FLS). The survey consists of a shallow observation of 2.5x2 sq deg ...